To see the other types of publications on this topic, follow the link: Iron Age; South Africa.
Dissertations / Theses on the topic 'Iron Age; South Africa'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Iron Age; South Africa.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
1
Karating, Robin-lea. "Exhumations, reburials and history making in post-apartheid South Africa." University of the Western Cape, 2018. http://hdl.handle.net/11394/6651.
Full textAbstract:
Magister Artium - MAThis mini-thesis, ‘Exhumation, Reburial and History Making in South Africa’, is concerned with an analysis of the practices of exhumation and reburial through discussing the case studies of the Iron-Age archaeological site of Mapungubwe, the Vergelegen Wine Estate in Somerset West and the reburials carried out by the Missing Persons Task Team (MPPT) from the National Prosecuting Authority (NPA), particularly its unsuccessful attempt at exhumations at the Stikland Cemetery, in an attempt to understand how they form part of the production of history. These case studies conceive of the times of the precolonial, slavery and apartheid, and are all linked temporally to an envisaged future through ideas of nation building and nationalism. As narratives produced through these exhumations and reburials, they contribute to the notion of making the post-apartheid by remaking history and reconstituting nation. Each of these case studies are significant as they in some way have been utilized in a manner that is relevant to us in the new democratic South Africa. This mini-thesis aims at rethinking the role of archaeologists, the exhumation and reburial processes, the construction of ethnicity, how the dead are used to construct narratives of struggle against apartheid and in general the implications each of these have on the re-making of history. It also thinks about what the practices of exhumation and reburial mean conceptually and how they relate to the concept of missingness, which I refer to as the process of making absence or invisibility. Thinking about exhumations and reburial in this way has allowed reflection on the purpose of the practices, in terms of who it’s for and how it’s perceived by the stakeholders involved in each case. Through dissecting each of these issues one may be able to trace how the remains to be reburied become missing. Therefore, the question of exhumation and reburial is essential in thinking about what it does for the human remains and how their identity is either shaped or lost. This thesis mainly argues that the remains in each of the case studies go through various phases of missingness and that their reburials and memorialization, or in the case of Stikland the spiritual repatriation, inscribes them further into narratives of the times that they emerged from.
2
Fumiko, Ohinata. "Archaeology of iron-using farming communities in Swaziland : pots, people and life during the first and second millennia AD." Thesis, University of Oxford, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.391069.
Full text
3
Antonites, Alexander. "The salt of Baleni : an archaeological investigation into the organization of production during the early iron age of South Africa." Pretoria : [s.n.], 2005. http://upetd.up.ac.za/thesis/available/etd-01312006-123257/.
Full text
4
Mathoho, Ndivhuho Eric. "Archaeology and archaeometallurgy in Limpopo province of South Africa: case studies of early iron age sites of Mutoti and Thomo." Doctoral thesis, Faculty of Science, 2021. http://hdl.handle.net/11427/33794.
Full textAbstract:
Decades of archaeological research have established the chronology of the history of culture by farmers in northern South Africa from the beginning of the first millennium AD to the recent past (1900). This thesis sought to explore the archaeology and archaeometallurgy of the early inhabitants of the Lowveld region. Rigorous methodological and theoretical approaches, which include Ethno-Historical, archaeological and archaeometallurgical studies, were employed to acquire the relevant information required to address research problems. Ceramic typology and settlement pattern studies were used to establish the culture-history to contextualise Iron Age sites, while Optical Microscopy, X-Ray Fluorescence analysis (XRF) and Scanning Electron Microscopy (SEM) were used to investigate the metallurgical remains to understand metal production technology. Both Mutoti and Thomo sites share several similarities, namely, they are situated near the perennial streams, the presence of metal-production sites and the predominant pottery types, consisting of short and long neck vessels dominated by comb stamping, incision and punctate decorations on the rim, neck and shoulder of the vessels. Ceramic tradition analysis revealed that both Mut 2 and Thomo combine ceramic designs and attributes that appeared in the region near the beginning of the first Millennium AD, that is the Urewe and the Kalundu traditions. Garonga Phase tradition developed from the Urewe tradition which represent the first facie, represented by the Silver Leaves sites of the Kwale branch ceramic tradition which dates to AD 280- 420 and the Kalundu tradition (which starts from Happy Rest and progresses to Diamant - Phase 2) which dates from the sixth century AD, both traditions share distinctive ceramics styles and decoration attributes (Burrett, 2007; Huffman, 2007). The radiocarbon-based chronology suggests that Mut 2 and Thomo sites were occupied contemporaneously and dated to AD 650-850. Analysis of the distribution of materials objects across Mut 2 site revealed active participation in both local and international trade network (Soapstone and Islamic ceramics) operated at a village status. Some of the craft production related evidence include metal production, eggshell beads and cloth manufacturing. Metal production was regarded as signature of power and authority in Iron Age period (Herbert, 1996). More research may strengthen this observation.
5
Bandama, Foreman. "The archaeology and technology of metal production in the Late Iron Age of the Southern Waterberg, Limpopo Province, South Africa." Doctoral thesis, University of Cape Town, 2013. http://hdl.handle.net/11427/10000.
Full textAbstract:
Includes abstract.The inception of metallurgy in southern Africa was relatively late, compared to other regions in Africa, and as a result, this part of the sub-continent was mistakenly thought to have been less innovative during the Iron Age. On the contrary, dedicated materials analyses are showing that starting from the terminal first millennium AD, southern Africa is replete with innovations that include the growth of state systems, specialised long-distance trading, the re-melting of glass beads, the working of ivory, and the weaving of cotton using ceramic spindle whorls. Additionally, the appearance of gold and tin production, against a background of on-going iron and copper metallurgy, has been interpreted by some as intimating innovation in metal technology. While some research energy has been invested into these novelties, there has only been incidental concern with the innovation in tin and bronze production. This study investigates the context of this novelty in the metallurgy of the Southern Waterberg, an area that hosts one of the unequivocal cases of pre-colonial tin mining in southern Africa. Recent trace element studies have indicated that bronzes from several elite sites in the region, were produced using tin that was sourced from the Southern Waterberg. The current chronology from the Southern Waterberg does not capture the full tin sequence that is implicated by the trace-element analyses of tin and bronze from dated contexts elsewhere and falls short by at two centuries. To bridge this gap, the present study sought, to explore the visibility of tin production in the Southern Waterberg at sites that are contemporary with the appearance of tin and bronze in southern Africa, and to investigate how this innovation was integrated into on-going iron and copper production. Rigorous methodological and theoretical approaches that include ethno-historical, archaeological and archaeometallurgical studies were employed in order to glean relevant information required to address these issues. Ceramic typological and settlement pattern studies were used to establish the culture-historical context, while Optical Microscopy, X-ray Fluorescence Analysis and Scanning Electron Microscopy of metallurgical remains were used to identify the metals and techniques that were employed. Ceramic technological studies were used to establish relationships between the metallurgy and the ceramic typological identities. The results suggest that the Southern Waterberg may have participated in the innovation of tin production in southern Africa. More research may strengthen this observation but it is entirely appropriate, in view of several metallurgical and non-metallurgical innovations that were on-going in societies throughout the region at large. Researchers now need to engage more with innovations and actively explore the various novelties that southern Africa exhibited during the Iron Age.
6
Pretorius, Antoinette E. "‘To eke out the vocabulary of old age’ : literary representations of ageing in transitional and post-transitional South Africa." Thesis, University of Pretoria, 2014. http://hdl.handle.net/2263/45906.
Full textAbstract:
This thesis investigates the depiction of ageing and old age in several key works of South African literature of the transitional and post-transitional period. The study covers texts set both in the transitional period prior to the 1994 democratic elections and in the years following that historical watershed. I examine how the literary representation of the ageing individual operates within the rhetoric of transition and new beginnings that characterizes the contemporary political and ideological climate of South Africa. The study includes a close examination of two novels (Age of Iron by J.M. Coetzee, and Agaat by Marlene van Niekerk), a collection of short stories (The Mistress’s Dog by David Medalie), and a volume of poetry (Body Bereft by Antjie Krog). My reading of these texts centres on exploring how the authors depict their ageing protagonists in relation to ideas of time, place and the body. Using Julia Kristeva’s theories on abjection, I analyse whether or not a degree of agency can be found in the abject depiction of older age. Similarly, I examine the ways in which reading older age through the lens of Mikhail Bakhtin’s idea of the grotesque allows for a liberation from reductive understandings of the embodiment of ageing individuals. Because both Agaat and Body Bereft are translated from Afrikaans, I also explore the ways in which translation intersects with the socio-political ideologies of the periods in which these texts are set, as well as how this may have an impact upon the representation of older age. Through examining the tension between the nostalgic, backward-looking perspective usually attributed to old age, and the progressive, forward-looking sentiment of modern South Africa, I investigate the ways in which these writers – Coetzee and Van Niekerk in particular – associate the ageing body with political concerns. I also show how, in their different ways, all four writers counteract stereotypes associated with senescence.Thesis (DLitt)--University of Pretoria, 2014.
tm2015
English
DLitt
Unrestricted
7
Tshitaudzi, Gilbert Tshimangadzo. "Nutritional status of pregnant women (under 20 years of age) with special emphasis on iron and folic acid status." Thesis, Stellenbosch : Stellenbosch University, 2003. http://hdl.handle.net/10019.1/53529.
Full textAbstract:
Thesis (Mnutr)--University of Stellenbosch, 2003.ENGLISH ABSTRACT: Pregnancy and growth have been found to have a detrimental effect on the micronutrient status of adolescent girls. Dietary studies in adolescents have shown serious shortfalls in their dietary iron and folate intake. The competition for nutrients between the fetus and a pregnant adolescent may carry the risk of complications such as intrauterine growth retardation, pre-eclampsia, both maternal and fetal intrapartum mortality, the increased risk of birth injuries and low birth weight. The aim of the study was to assess the nutritional status of rural black, pregnant teenagers attending the antenatal clinic at Siloam Hospital in the Limpopo Province, with special emphasis on iron and folic acid intake, and evaluation of the newborn babies in terms of weight status and neural tube defects. The nutritional status was determined in 40 pregnant and 40 non-pregnant adolescent girls. The pregnant girls were selected during their first visit to the antenatal clinic, and the non-pregnant girls were selected from nearby schools. The demographic and dietary history questionnaires were used to collect information from the subjects. The dietary intake of the subjects was collected by the completion of a pre-tested quantified food frequency questionnaire. The anthropometric questionnaire was used to get information from the pregnant adolescents and the control group. The infant anthropometric measurements questionnaire provided information on the infant and the outcome of birth. Blood was collected from the pregnant adolescent girls and the control subjects. Anaemia was observed in 57.5% of the pregnant and 27.5% of the non-pregnant adolescents (haemoglobin
8
Gilbert, Cheryl Lee. "Diet and subsistence patterns in the later iron age of South Africa : an analysis of stable carbon and nitrogen isotopes and the incidence of dental caries." Master's thesis, University of Cape Town, 1995. http://hdl.handle.net/11427/21403.
Full textAbstract:
Bibliography: pages 103-116.Current archaeological perspectives on the change in Later Iron Age diet and subsistence patterns and the subsequent affect on the economy, are re-examined using isotopic and caries analyses. Existing perspectives have focused mainly on material archaeological evidence and are not reflective of diet at the individual level. Consequently, the focus of archaeological research has been biased towards the importance of cattle in subsistence patterns and the economy, and the role of agriculture has not been as thoroughly investigated. In order to address this problem the isotopic signatures of 72skeletal remains, and the pattern of carious lesions of 44 of those individuals, were examined. The samples were drawn from different ethnic groups and geographical/climatic regions. Skeletons were analysed for both ᵟ¹³C and ᵟ¹⁵ N values in order to better reflect both the level of cultigen consumption and the relative importance of animal protein in the diet. The results were initially examined at an individual level, within the biomes from which they were drawn, to determine subsistence type. The diets of persons and ethnic groups was then compared to archaeological and ethnographical research. Combination of results demonstrates a trend towards more enriched ᵟ¹³C values over time. Although there were differences between individuals diets, there is an overall increasing consumption (and therefore reliance) on domesticated grains, whilst the consumptive levels of animal protein remain relatively constant over the last 1000 years. Consequently, the context of previously undated skeletal material was founded on the trend towards increasing ᵟ¹³C values during the second millennium. The creation of a set of criteria based on pattern, type and extent on carious lesions, has provided a further means of assessing the carbohydrate intake level of individuals. An increase in both ᵟ¹³C values and the incidence of caries during the 18th century, may reflect the introduction of maize in the interior of South Africa, via Delagoa Bay. It is suggested that population growth and increased demand resulted in maize replacing indigenous African cultigens to become a staple food source after this period. In conclusion it is postulated that further re-examination of the current outlook should be undertaken as it is clear from this study that the Later Iron Age is heterogenous with comparable but distinct dietary levels.
9
Machemedze, Takwanisa. "Old age mortality in South Africa." Master's thesis, University of Cape Town, 2009. http://hdl.handle.net/11427/8980.
Full textAbstract:
Includes bibliographical references (leaves 71-74).This study estimates the mortality of the South African oldest old age population (in five year age groups from age 75 up to the open age interval 100 and above) and in the process re-estimates the numbers of people in the population at these ages at the time of the 1996 and 2001 censuses, and the 2007 Community Survey. In countries where the data on the old age population have been verified, it has been observed that the data are marred by errors in the form of age exaggeration, age digit preference, relative under/over count of the population and under-registration of deaths. These errors have been observed to have the net effect of underestimating mortality of the oldest old age groups. The current research applies the method of extinct generations to estimate indirectly the population numbers at the oldest old age groups (75 up to 100 and above) using data on reported deaths alone. Age heaping and year of birth preference in the reported deaths are assessed using ratios of the probability of death estimated from the data. Age exaggeration in the data on reported deaths is assessed using ratios of deaths compared with same ratios from a standard population. Age heaping and year of birth preference in the census/survey population is assessed using the modified Whipple's Index of age accuracy. The Generalized Growth Balance (GGB) and Synthetic Extinct Generations (SEG+delta) methods are applied to adjust for under reporting of deaths and to assess patterns of age exaggeration in the census/survey population. The difference between the estimates of the completeness of reporting of deaths from the two methods is small (less than 1 per cent) and has been observed to have little impact on the mortality estimates. Final estimates of the completeness of reporting of deaths used are those derived using the SEG+delta method. After re-estimating the population numbers and adjusting for completeness of reporting of deaths, mortality rates were then estimated. Results obtained from the method of extinct generations suggest that there is no systematic difference between the census/ survey population and the population numbers estimated from deaths except at ages 95 and above. Measures of age accuracy show that there are patterns of preferring 1910, 1914, 1918, 1920 and 1930 as the years of birth in the census/survey population and these patterns are also found in the registered deaths. The impact of these errors was investigated and the results show that preference of certain years of birth cause fluctuations in the mortality rates. Patterns observed after applying the SEG+delta method suggest that the completeness of reporting of deaths falls with age at the advanced ages (from age 90 and above) and as a result, the estimated mortality rates above this age are lower than those estimated from the United Nations Population Division (UNPD) and US Census Bureau (USCB) population projections, and Dorrington, Moultrie and Timaeus (2004). Conclusions reached are that the mortality rates for the age groups 75 to 89 derived after re-estimating the population numbers and after allowing for the fall in the completeness of reporting of deaths are lower but not significantly different from those inferred from the UNPD and USCB population projections, and estimates derived by Dorrington, Moultrie and Timaeus (2004). The research recommends mortality estimates from the UNPD since they are the closest to the estimates derived using the published census population numbers for the whole period between the nights of 9-10 October 1996 and 9-10 October 2001. However, the research produced better estimates of the oldest old age population numbers relative to the census/survey numbers.
10
Walker, Ellen Jeanine. "Iron age decorative metalwork in southern Africa: an archival study." Doctoral thesis, University of Cape Town, 2016. http://hdl.handle.net/11427/20643.
Full textAbstract:
This thesis addresses continuity and change in the manufacture and use of decorative metalwork in the Iron Age (200-1900 AD) of southern Africa, within a framework of archival studies and artefact studies theory. The thesis adopted a direct historical approach which exploited the huge database of existing information to create typologies of objects and processing techniques that are prominent in ethno-historical sources of the 19th and 20th centuries. This process enabled for the first time, a comprehensive mapping of object typologies and techniques of manufacture by ethnic groups thereby allowing cross cultural comparisons. Subsequently, the study explored the typology of objects utilized further back in the time of the Early Iron Age using archaeological evidence. It demonstrated that most of the objects used in the Iron Age were similar to those that were used in the 19th century. However, new innovations were made along the way with metals and alloys being constantly added to the range of materials worked. A dedicated visual study of fabrication techniques employed in the manufacture of ethnographic materials housed at Iziko Museum of Cape Town was carried out. The techniques gleaned from the macroscopic study were compared with those metallographically documented in the literature for the manufacture of Iron Age objects, further exposing continuity and change in metal fabrication. The social, economic and political role of decorative metalwork was hardly static, and varied from context to context and group to group.
11
Inall, Yvonne Louise. "A typological assessment of Iron Age weapons in South Italy." University of Sydney, 2009. http://hdl.handle.net/2123/5464.
Full textAbstract:
Master of Philosophy (MPhil)Typologies, especially of spearheads, have been decried as inadequate by the archaeological community. They have prevented the synthetic study of ancient weapons and obscured cultural contacts, changes in form and distribution, and changes in fighting style. This thesis presents new typologies of spearheads and swords which are not based on aesthetics or the need to communicate a large amount of material succinctly in the limited space of a site report. Rather, these typologies attempt to perceive the functional characteristics of these weapon classes. The thesis surveys a range of sites in Daunia, Basilicata and Southern Campania applying these new typologies to large suites of weapons. From this assessment a number of conclusions have flowed regarding cultural contacts between indigenous Southern Italic groups and with immigrating groups of Villanovan and Greek origin. The assessment reveals the variety of weapon forms in use and tracks changes over time. These changes expose cultural transformations and alterations in fighting styles. The tracking of paraphernalia often associated with weapons in modern scholarship has also revealed some nuances in patterns of association with weapons which were not previously apparent.
12
Inall, Yvonne L. "A typological assessment of Iron Age weapons in South Italy." Connect to full text, 2009. http://hdl.handle.net/2123/5464.
Full textAbstract:
Thesis (M. Phil.)--University of Sydney, 2009.Title from title screen (viewed October 26, 2009) Submitted in fulfilment of the requirements for the degree of Master of Philosophy to the School of Philosophical and Historical Inquiry, Dept. of Archaeology, Faculty of Arts. Includes bliographical references. Also available in print form.
13
Allen, Caitlin Shannon. "Firm Size, Age and Growth in South Africa." Master's thesis, University of Cape Town, 2018. http://hdl.handle.net/11427/29416.
Full textAbstract:
The relationship between a firm’s size, age and proportional growth rate is examined using multiple samples of South African firm-level data from the early to mid-2000s. The foundation of this study is Gibrat’s Law of Proportionate Effect (Gibrat, 1931), which states that a firm’s proportional growth rate is independent of its absolute size at the start of a given period. It is assumed that firm growth follows a random walk and, therefore, should not be affected by firm size. An implication of Gibrat’s Law of Proportionate Effect is that the firm size distribution is lognormal. However, based on both empirical and theoretical literature, this theory of firm growth has fallen out of favour and been replaced by the proposal that there is an inverse relationship between a firm’s proportional growth rate and both its size and age. Two questions are evaluated in this research using the samples of South African firms. The first is whether the firm size distribution is lognormal. If this is not the case then Gibrat’s Law of Proportionate Effect can be rejected. However, this approach cannot confirm that Gibrat’s theory is valid and will, therefore, be referred to in this paper as a partial test. It was shown that the log firm size distribution was not normal, but rather right-skewed with a Pareto distribution characterising the upper tail. Consequently, Gibrat’s Law of Proportionate Effect was rejected for the datasets of South African firms. This evidence is largely observational and does not explicitly assess the relationship between proportional growth rates and firm size. Therefore, the second question is whether Gibrat’s Law of Proportionate Effect holds. This was investigated by testing conditions derived from Gibrat’s Law of Proportionate Effect, the results of which can lead to either the rejection or acceptance of this proposition. This study extends Gibrat’s research in order to determine the relationship between firm age and proportional growth. Statistical methods, such as Ordinary Least Squares regressions, considering only firms that survived the period under consideration, were used. The results revealed that Gibrat’s Law of Proportionate Effect was invalid and there was a systematic tendency for the smaller, younger South African firms in the datasets to grow proportionally faster than the larger, older firms. This finding supports the view that firm growth is not entirely random.
14
Richman, Ronald David. "Old age mortality in South Africa, 1985-2011." Master's thesis, University of Cape Town, 2017. http://hdl.handle.net/11427/27486.
Full textAbstract:
Estimating the level and trend in population mortality rates at advanced ages in South Africa is complicated by problems with both the population and death data. Population and death data, particularly in developing countries, often suffer from age misreporting - age exaggeration and digit preference. Also, censuses may under- or overestimate the population and registration of deaths is usually incomplete in developing countries (Dorrington, Moultrie and Timæus 2004). To avoid these problems, the research in this dissertation relies on the method of extinct generations and its extensions (Thatcher, Kannisto and Andreev 2002) to re-estimate the population using only the death data, which is often recorded more accurately than the population data. Since deaths are not reported completely in South Africa, the death data must be corrected before use. Death Distribution Methods (Moultrie, Dorrington, Hill et al. 2013) are used to correct the death data for incomplete registration of deaths. After correction, Near Extinct Generation methods (NEG) are used to re-estimate the population by projecting future deaths of nearly extinct cohorts. After showing that mortality rates produced using the original NEG methods are biased because of age and year of birth heaping present in the South African death data, the NEG methods are adapted to the South African context. The adapted NEG model smooths the age and year of birth heaping in the death data and produces mortality rates that are less biased than the original NEG methods. This model - referred to as the NEG-GAM model in this research - is used to re-estimate the population at each age from 70 and above and to calculate mortality rates since 1985. The population estimates aged 70+ produced using the NEG-GAM model match those from the 2011 census well. It is found that both the population and death data suffer from the same pattern of heaping, that the population and death data are affected by age exaggeration and that the death data are less affected by age exaggeration than the population data. The level and trend in mortality rates calculated using the NEG-GAM model are discussed and compared to the mortality rates in the Human Mortality Database and other studies of South African mortality. The mortality rates produced for the African and Coloured population groups appear too low at the older ages due to age exaggeration in the death data, while those for the Indian and White population groups appear to be reasonable over the entire age range. Mortality appears to be improving in the age range 70-79 for the Coloured, Indian and White population groups and deteriorating slowly for the African population group.
15
Haselgrove, Colin. "Iron Age coin finds in South-East England : the archaeological context." Thesis, University of Cambridge, 1986. https://www.repository.cam.ac.uk/handle/1810/273112.
Full text
16
Wurz, Sarah (Sarah Jacoba Deborah). "The middle stone age at Klasies River, South Africa." Thesis, Stellenbosch : Stellenbosch University, 2000. http://hdl.handle.net/10019.1/51998.
Full textAbstract:
Thesis (D Phil)--Stellenbosch University, 2000.ENGLISH ABSTRACT: The Late Pleistocene, Middle Stone Age artefact sequence at the Klasies River main site, was studied to establish what information this held for inferences on the emergence of symbolic thought and communication. The approach adopted was to complement traditional typological analysis by a technological study of artefact production within the framework of the chafne opératoire. The results show that technology was aimed at producing preformed blanks. In the choice of materials, the technique and method of blank production and the retouch of blanks, arbitrary or stylistic choices were made. Changes in stylistic conventions can be documented through the sequence. Changing conventions in artefact production show that the lives of the people who made the artefacts were structured in a symbolic web. These results together with evidence from evolutionary biology, show that by at least 115 000 years ago, people were able to think and speak symbolically. This African archaeological evidence for the emergence of symbolism, a defining attribute of modem peoples, is much older than previously considered. KEYWORDS: Klasies River, Middle Stone Age, technology, symbolic communication, human evolution.
AFRIKAANSE OPSOMMING: Die Latere Pleistoseen, Middel Steentydperk artefakte by Klasiesrivier vindplaas is bestudeer om te bepaal watter kennis ingewin kan word aangaande die ontstaan van simboliese denkwyse en kommunikasie. Die benadering wat gevolg is, was om tradisionele tipologiese analise te komplementeer met 'n tegnologiese studie van artefak produksie binne die raamwerk van die chafne opératoire. Die resultate demonstreer dat tegnologie gemik was op die produksie van voorafgevormde skilfers. Die keuse van roumateriaal, die tegniek en metode van produksie en die herafwerk van skilfers is gelei deur arbitrêre stilistiese keuses. Veranderinge in hierdie konvensies kan gedokumenteer word deur die hele sekwens. Hierdie verandering is tipies van mense wie se lewens gestruktureer word deur 'n simboliese web. Dié resultate, en dié van evolusionêre biologie, dui daarop dat mense reeds teen 115 000 jaar gelede simboliese denke en spraak magtig was. Hierdie bewyse vanuit Afrika vir die ontstaan van simboliese gedrag is veel vroeër as vantevore gereken. SLEUTEL WOORDE: Klasiesrivier, Middel Steentydperk, tegnologie, simboliese kommunikasie, menslike evolusie.
17
Barrell, Howard. "Conscripts to their age African National Congress operational strategy, 1976-1986 /." Thesis, [Pretoria, South Africa : South African History Online], 1993. http://www.sahistory.org.za/pages/sources/barrel%5Fthesis/.
Full textAbstract:
Originally issued as a Ph. D. thesis from the University of Oxford, 1993.Title from introductory page (SAHO website, viewed July 28, 2005). Includes bibliographical references. HTML version of the print thesis.
18
Popa, Cătălin Nicolae. "Uncovering group identity in the Late Iron Age of South-East Europe." Thesis, University of Cambridge, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.648861.
Full text
19
Reid, D. A. M. "The role of cattle in the later Iron Age communities of southern Uganda." Thesis, University of Cambridge, 1991. https://www.repository.cam.ac.uk/handle/1810/271918.
Full text
20
Thompson, David Martin Ogilvie. "Unfair discrimination and dismissal based on age." Thesis, Nelson Mandela Metropolitan University, 2010. http://hdl.handle.net/10948/1287.
Full textAbstract:
Section 187(2)(b) of the Labour Relations Act sets out certain justifications for what may seem to be unfair discrimination in the workplace. The purpose of this note is to discuss the provisions of Age Discrimination, with specific focus on the rights of older employees, who have reached, what some might term, the ‘normal or agreed retirement age’. In the discuss which follows reference will be made to the Constitution of the Republic of South Africa1 in order to investigate the provisions of our new democratic era, and what is said therein about discrimination, and age discrimination in particular. In our new Constitutional dispensation there have also been circumstances where certain kinds of discrimination have become accepted on society, for example Affirmative Action, and an enquiry into the difference between discrimination and differentiation will therefore also be necessary. The provisions of the Employment Equity Act,2 which deal specifically with eliminating unfair discrimination in the workplace, and the Labour Relations Act,3 which deals primarily with the rights of employees, employers and trade unions, and seeks to harmonize employer-employee relations will be discussed wherein specific reference will be made to section 187(2)(b) of the LRA. A further discussion will outline the circumstances of what is meant by dismissal in the context of age based dismissals, and whether such a dismissal is infact a dismissal and whether, within the requirements of the LRA such a dismissal, or termination of employment contract, is infact fair. Furthermore, a comparative perspective of other jurisdictions will give a more complete understanding of the issue of age-based dismissals within the current context. However, to refer to legislation and foreign decisions alone, while being of important reference, is not enough and a enquiry into our own case law will be of significant importance to determine a path of direction one can expect when faced with a question of dismissals based on mandatory retirement ages, and in particular, a dismissal which has been so executed with recourse to section 187(2)(b) of the LRA. In the various cases the reasoning and rationale behind the decision making will shed light on a seemingly unresolved area of labour law, and in reading further not only in the judgments but also in various articles, one will see that there are many arguments for and against the use of a mandatory retirement age, the most important of which will be highlighted.
21
Phillips, David. "Mineralogy and petrology of the Townlands iron-rich ultramafic pegmatite." Thesis, Rhodes University, 1985. http://hdl.handle.net/10962/d1007617.
Full textAbstract:
The Townlands iron-rich ultramafic pegmatite is a relatively large pipelike body situated in the western corner of Rustenburg Section, Rustenburg Platinum Mines. It is characterised by a strong negative magnetic signature and transgresses the noritic layered sequence of the upper critical zone of the Bushveld Complex. The layered rocks are downwarped in the vicinity of the pipe and are in sharp contact with the pegmatitic material. The pegmatite varies in composition between dunite and wehrlite, with the marginal zones being more wehrlitic in composition. Olivine (Fo₃₀ - Fo₅₂) and clinopyroxene (Wo₄₅En₃₀Fs₂₅ - Wo₄₅En₃₇Fs₁₈) are the dominant constituents and accessory phases include ilmenite, Ti -magnetite, apatite, amphiboles, chlorite-group minerals, biotite, ilvaite and a host of unusual ore minerals. The Fe-Ti oxides exhibit exsolution textures typically found in slowly cooled igneous rocks and temperatures of formati on are consi dered to be in excess of 800°C. The UG2 chromitite leader layers intersected by borehole TLP.l are enriched in Fe and Ti and exhibit compositions intermediate between chromite and Ti-magnetite. The ore mineral assemblage includes a primary sulphide assemblage consisting of troilite, chalcopyrite, cubanite and pentlandite, and an array of unusual phases formed by late-stage secondary processes. The unusual sulphides mooihoekite and haycockite, that occur in certain parts of the pegmatite, are considered to have formed by partial replacement of the primary assemblage and a possible paragenetic sequence is discussed. Mineral compositions and whole rock geochemical data are consistent with an origin for the pegmatite by crystallization from a fractionated melt. It is suggested that intercumulus fluids, trapped during the crystallization of the noritic layered sequence, accumulated in an area of structural weakness, in response to an increasing overburden pressure and/or tectonic activity. Evidence is also presented that indicates that the Townlands pegmatite may consist of at least two separate, but adjoining pegmatite bodies.KMBT_363
Adobe Acrobat 9.54 Paper Capture Plug-in
22
Karega-Munene. "Neolithic/Iron Age subsidence economies in the Lake Victoria Basin of East Africa." Thesis, University of Cambridge, 1993. https://www.repository.cam.ac.uk/handle/1810/272552.
Full text
23
Maxwell, Mhairi Louise. "Out of the ordinary : the materiality of the south-east Scottish Iron Age." Thesis, University of Bradford, 2012. http://hdl.handle.net/10454/5737.
Full textAbstract:
A materiality approach is developed in this thesis in order to understand social-material relationships during the south-east Scottish Iron Age. The focus is on everyday objects, traditionally lesser studied in terms of cosmological value, made of bone and antler, stone, clay/pottery and metal (copper alloy and iron) from the Broxmouth Hillfort assemblage and other excavated Iron Age sites in East Lothian. This study sets out to move away from typology to examine the connections between these materials through their sourcing, affordances (signative and pragmatic), design, manufacture, use and deposition. In addition to the archaeological evidence, a range of analytical methods are employed; including laser scanning confocal microscopy, raman spectroscopy, and residue and isotopic analysis. It becomes evident that the materials studied, despite their predominantly local availability, were invested with meaning in appropriation, making, and were deliberately curated and maintained in use, assembling rich personal biographies. Identities were tied up with making, using and depositing of materials in turn embodying beliefs of fertility, renewal and productivity which were central to Iron Age cosmology, continuing into the Roman Iron Age. These results contribute to our understanding of the construction and practice of society in the Iron Age of Britain, with implications for how we may design our own 21st Century material worlds. It is proposed that social relations in the Iron Age of south-east Scotland were heterarchical.
24
Maxwell, Mhairi L. "Out of the ordinary. The materiality of the south-east Scottish Iron Age." Thesis, University of Bradford, 2012. http://hdl.handle.net/10454/5737.
Full textAbstract:
A materiality approach is developed in this thesis in order to understand social-material
relationships during the south-east Scottish Iron Age. The focus is on everyday objects,
traditionally lesser studied in terms of cosmological value, made of bone and antler,
stone, clay/pottery and metal (copper alloy and iron) from the Broxmouth Hillfort
assemblage and other excavated Iron Age sites in East Lothian. This study sets out to
move away from typology to examine the connections between these materials through
their sourcing, affordances (signative and pragmatic), design, manufacture, use and
deposition. In addition to the archaeological evidence, a range of analytical methods are
employed; including laser scanning confocal microscopy, raman spectroscopy, and
residue and isotopic analysis.
It becomes evident that the materials studied, despite their predominantly local
availability, were invested with meaning in appropriation, making, and were
deliberately curated and maintained in use, assembling rich personal biographies.
Identities were tied up with making, using and depositing of materials in turn
embodying beliefs of fertility, renewal and productivity which were central to Iron Age
cosmology, continuing into the Roman Iron Age. These results contribute to our
understanding of the construction and practice of society in the Iron Age of Britain, with
implications for how we may design our own 21st Century material worlds. It is
proposed that social relations in the Iron Age of south-east Scotland were heterarchical.Society of Antiquaries of Scotland
25
Tsikos, Harilaos. "The mineralogy and geochemistry of the Voëlwater banded iron-formation, Northern Cape Province." Thesis, Rhodes University, 1995. http://hdl.handle.net/10962/d1005589.
Full textAbstract:
Banded iron-formations (BIFs) are chemically precipitated sedimentary rocks in which Fe-rich bands or laminae alternate with Fe-poor ones. They formed within a specific time-span of the geological record. Their occurrence is restricted between 2.3 and 1.9 Ga, and characterises virtually all the major Precambrian-aged sedimentary basins of the world. The Precambrian Transvaal Basin in Griqualand West, South Africa, is noted for its well-developed BIF units. The Kuruman and Griquatown BIFs comprising the Asbesheuwels Subgroup (up to 1000m thick) are the best known and thickest of these. As far as metallogenesis is concerned, the Kuruman BIF is of major importance, for it carries the world's largest crocidolite (blue asbestos) deposits. The uppermost, youngest member of iron-formation deposition in the Griqualand West Sequence is represented by the Voëlwater BIF. The direct association between the latter and the giant Mn-deposits of the Kalahari Field, renders the Voëlwater association unusual, if not unique, in the geological record. The Voëlwater BIF represents a typical example of the so-called "Superior-type", and in the area of study it has undergone late-diagennetic to low-grade metamorphic processes. This is evident from the mineralogical composition and textural signature of the various BIF lithologies. Specifically, the minerals that make up the Voëlwater BIF are mainly chert(quartz), Fe-oxides (magnetite and hematite), Fe-silicates (greenalite, stilpnomelane, minnesotaite, riebeckite, Fe-mica), Fe-carbonates (members of the dolomite-ankerite series and siderite), calcite and pyrite. Soft-sediment deformation structures and shear-stress indicators are abundant in carbonate-rich and granular, silicate-rich BIF lithologies respectively. The bulk chemical composition of the study rocks is relatively simple and is characterised by the abundance of essentially three elements, namely Si, Fe, and Ca, which make up more than 90% of the total chemical composition of the Voëlwater BIFs. The detrital component of the study rocks is negligible. Mn-enrichments characterise all the transitional lithologies towards the interbedded Mn-orebodies, as well as the well-developed, hematitic BIF-unit between the Ongeluk lavas and the lower Mn-horizon. In terms of trace element composition, no significant enrichments or depletions, were encountered, except for some unusually high values of Sr and Ba and Co in carbonate-rich and Mn-rich lithologies respectively. Geochemical comparisons on the basis of major, trace and light rare-earth element composition verified the similarity between the Voëlwater BIF and other major Superior-type BIFs of the world (e.g. Kuruman, Griquatown, Sokoman, Biwabik, Gunflint, Mara-Mamba, Brockman, etc.). The processes that led to the formation of the Voëlwater BIFs may have been very similar to the ones described in various genetic models proposed in recent years. They would have involved a combination of: i. hydrothermal processes related to mid-ocean ridge (MOR) or hot-spot activity that acted as major iron suppliers; ii. storm-mixing in stratified oceans (bottom, anoxic, Fe⁺² reservoir-thermo- pycnocline zone-upper, mixed, SiO₂-saturated layer), largely dictated by seasonal changes and contemporaneous volcanism; iii. periodic, convection-driven upwelling mechanisms acting as major Fe-precipitators; and, iv. organic carbon productivity that was responsible for the anoxic diagenesis of the initial sediment. However, the origin of Fe and Mn for the genesis of the Voëlwater sediments was difficult to explain with typical convection-cell models in active mid-ocean ridges, in contrast to previous hypotheses. Instead, large-scale endogenous processes in the form of magma convection, underplating, differentiation and associated degassing, may have played a critical role in the supply of metals for the formation of large amounts of BIFs in the Precambrian. The present study of the Voëlwater BIF also bears strong implications regarding the metallogenesis of Mn in the Precambrian. The common association of Mn with carbonate-bearing sediments, the transitional character of the Voëlwater BIF towards carbonate lithologies (Mooidraai dolomites) and the critical timing of the deposition of the former in terms of the Precambrian atmospheric-lithospheric- hydrospheric evolution, may be important indicators for the exploration of large Mn-deposits in Precambrian sedimentary basins of the world.
26
Allen, Dean. "'Logan's Golden Age' : cricket, politics and empire, South Africa 1888-1910." Thesis, University of Brighton, 2008. https://research.brighton.ac.uk/en/studentTheses/f7e36da5-3b84-497d-8cbb-3d4777056491.
Full textAbstract:
Cecil John Rhodes is on record as saying he had only met two creators in South Africa, one being himself and the other James Douglas Logan. The orchestrator of the 190I South African cricket tour to England, J.D. Logan was born in Reston, Scotland on November 26, 1857. The son of a Borders Railwayman, Logan had emigrated to South Africa where, with an entrepreneurial mind, he quickly made his fortune within South Africa's burgeoning colonial society. Affectionately referred to by the South African press as the 'Laird of Matjiesfontein', after the small Karoo town he had developed, Logan's deep affection for cricket undoubtedly helped to popularise the game in South Africa. An important figure culturally as well as politically, Logan's life and contribution to the game is the focus ofthis socio-historical study. In order to explore the processes and events that shaped South African cricket between 1888 and 1910, a wealth of original data was collected from archives in the United Kingdom and South Africa predominantly. A range of secondary sources were also used. The study examines the links between the development of the 'empire game' in South Africa and the social and political environment of the time, with particular reference to the role of James Logan. In many respects, Logan's involvement in politics and the early cricket tours reflected wider processes at work in South Africa's colonial society. This pugnacious Scotsman epitomised the process of cultural imperialism forged between Britain and Her far-flung colonies. His is a story of sport, politics and opportunity and is a distinctive contribution to any history of cricket and colonialism in late nineteenth century South Africa.
27
Samson, Anne Margaret. "Britain, South Africa and the east Africa campaign, 1914-1918 : the union comes of age." Thesis, University of London, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.406863.
Full text
28
Samson, Anne Margaret. "Britain, South Africa and the East Africa campaign, 1914-1918 : the Union comes of age /." London ; New York : Tauris Academic Studies, 2006. http://catalogue.bnf.fr/ark:/12148/cb402257351.
Full text
29
Booley, Fadwah. "Analysis of genes implicated in iron regulation in individuals presenting with primary iron overload in the South African population." Thesis, Stellenbosch : University of Stellenbosch, 2007. http://hdl.handle.net/10019.1/2220.
Full textAbstract:
Thesis (MSc (Genetics))—University of Stellenbosch, 2007.Hereditary haemochromatosis (HH), a common autosomal recessive disease, is characterized by increased iron absorption leading to progressive iron accumulation in organs such as the liver, heart and pancreas. In the South African population the disease is prevalent in individuals of Caucasian origin, with a carrier frequency of one in six for the C282Y mutation in the HFE gene. We investigated the role of genes implicated in iron metabolism, including the high-iron gene (HFE), haem oxgenase-1 gene (HMOX1), solute carrier family 40 (iron-regulated transporter) member 1 gene (SLC40A1), cytochrome b reductase gene (CYBRD1), hepcidin antimicrobial peptide gene (HAMP) and the hemojuvelin gene (HJV) in a patient cohort with non-HFE iron overload. DNA analysis was performed on samples from 36 unrelated South African Caucasian patients presenting with primary iron overload, who tested either negative or heterozygous for C282Y. In this study, mutation screening was performed by PCR amplification and HEX-SSCP analysis. Sixteen previously described and two novel variants were identified by semi-automated DNA sequencing. Common variants identified in the HFE gene included C282Y, H63D, IVS2+4T→C, IVS4-44T→C, IVS4+48G→A and IVS5-47G→A. The Q127H mutation in exon 3 of the HFE gene was identified in one patient, who tested negative for both C282Y and H63D. Mutation S65C was identified only in the population-matched controls and was absent in the patient group. Other previously described polymorphisms identified included the IVS5+51delTGGCTGTCTGACT deletion in HMOX1, I109 and V221 in SLC40A1, IVS1-4C→G, IVS2+8T→C and S266N, in the CYBRD1 gene and, S264 and A310G in the HJV gene. The novel variants, -89C→T, in the promoter region of the CYBRD1 gene, was detected in only one patient, while S333 in exon 4 of the HJV gene was present in three patients. These variants were not identified in any of the population-matched controls screened and could explain the non-HFE iron overload presented by these patients. This study clearly demonstrates the importance of modifier genes in patients with iron overload that cannot be explained by the common C282Y mutation. Studies on iron-related genes and the identification of mutations in these genes in non-HFE patients could lead to improved diagnosis and counselling of South African patients presenting with primary iron overload.
30
Scholfield, Jordan Ryan. "Exploring Networks of Interaction at the Iron Age Site of Mtanye, South Western Zimbabwe." Master's thesis, Faculty of Science, 2019. https://hdl.handle.net/11427/31815.
Full textAbstract:
Networks of interaction as well as community formation have been widely researched within Southern Zambezian archaeology of the early second millennium A.D. Despite this, research into these communities is often asymmetrical with objects delegated a passive role in the formation of not only networks of interaction but also socio-material development. Further, research tends to focus on society as the source of action in these processes. Using the site of Mtanye, the aim of this study is to create a relational ontology in which agency is distributed among heterogenous entities. Moreover, this study attempts to demonstrate how networks of interaction might have shaped this community. Mtanye is a Leopard’s Kopje phase 2 site with stratified Transitional K2 (1200-1250 A.D.) and Mapungubwe (1250-1300) deposit. This site has further been placed into the wider conventional narrative as being evidence for the expansion of the Mapungubwe state. In order to recreate the networks of interaction that were present at Mtanye, Actor-Network Theory informed in part by the ethno-historical record was enlisted. The results of this study show that Mtanye has hill occupation, stone walling and access to prestige goods, characteristics conventionally not ascribed to periphery sites. Further, the results of this study suggest that it is more prudent to view the socio-material development of Mtanye, not in terms of the political or economic expansion of a hegemonic power but rather as a product of heterogeneous networks of interaction. This study may further provide a framework for understanding socio-material development and networks of interaction during the early second millennium A.D. in Southern Zambezia.
31
Oosthuizen, Tania. "Discrimination based on age in labour law." Thesis, Nelson Mandela Metropolitan University, 2017. http://hdl.handle.net/10948/19484.
Full textAbstract:
This piece aims to prove that a compulsory retirement age can no longer be justified in South Africa as a constitutional state. In times where people are gradually reaching older ages due to advances in a variety of fields, it seemed that the concept of a compulsory retirement age requires an in depth consideration. This is especially measured against the backdrop of equality and discrimination legislation within The Republic of South Africa. The development of social security law provides the larger framework in which to understand the concept and intentions around retirement. Discrimination and equality legislation demonstrates that age as a listed ground for discrimination does not necessarily simplify the jurisprudence pertaining to it, especially where alternatives have been developed for continued employment. The main point of reference in the South African justice system concerning discrimination disputes is the Harksen v Lane test, whereas the principle encapsulated in Waco v Schweitzer, relates particularly to discrimination based on age. These judgements and subsequent application will be illustrated and considered during the course of this research. The influence of fund rules and fixed-term contracts on the situation will aim to show the reality of the situation. In an effort to show that the problem of an ageing workforce and retirement is not localised to South Africa, an international overview of other constitutional countries is included for context. The comparison goes further to include non-constitutional countries to illustrate the global issue. This comparison was also included in an effort to find alternative strategies that may be utilised in South Africa for retirement and age discrimination legislations and social policies.
32
Badenhorst, Jaco Cornelis. "The precambrian iron-formations in the Limpopo belt as represented by the magnetite quartzite deposits at Moonlight, Koedoesrand area, Northern Transvaal." Thesis, Rhodes University, 1991. http://hdl.handle.net/10962/d1013309.
Full textAbstract:
This dissertation is based largely on data that was accumulated during the execution of an exploration program by Iscor Ltd in the Northern Transvaal. The program included geological mapping, geophysical surveys and drilling, on Precambrian iron-formations in the Central Zone of the Limpopo Belt. The structure, stratigraphy, metamorphism, and economic importance of the magnetite quartzites and associated lithologies of the Moonlight prospect are discussed. The lithologies underlying the Moonlight prospect area consist of various pink- and grey-banded gneisses and pink granulite, together with a variety of metasedimentary supracrustal rock-types and concordant serpentinite bodies. The gneissic rock-types consist of chlorite-quartz-feldspar gneiss, chlorite-quartz-feldspar augen gneiss, hornblende-quartz-feldspar gneiss, biotite-quartz-feldspar gneiss, felsic and mafic granulite, and foliated amphibolite. The metasedimentary lithologies are represented by calc-silicates and marble, white quartz-feldspar granulite, magnetite quartzite, metaquartzite and garnet-bearing granulite and gneiss (metapelites). The concordant ultramafic bodies consist of serpentinite with lesser amphibolite, dunite, and chromitite. Intrusive pegmatites and diabase dykes are also present in the prospect area. Metamorphism reached granulite-facies, and more than one retrqgrade metamorphic event is recognized . Amphibolite-facies assemblages are present, but it is uncertain whether they represent another retrograde event . Polyphase deformation has produced intense and complex folding , resulting in irregular magnetite quartzite orebodies. The high metamorphic grades have resulted in medium- grained recrystallization of the magnetite-quartzites with a loss of prominent banding often associated with these rock-types . The magnetite quartzite occurs as three seperate but related ore zones, consisting of one or more ore-bands seperated by other lithologies. All three zones form poor outcrops and suboutcrops in a generally flat lying and sand covered area. · Although representing a low-grade iron ore (32% total Fe), the magnetite quartzite deposits at Moonlight are regarded as potentially viable due to the large opencast tonnages available at low stripping ratios, and the relatively cheap and easy beneficiation process needed to produce a magnetite concentrate with 69-70% total Fe.
33
Gwatinetsa, Demand. "Distribution of iron-titanium oxides in the vanadiferous main magnetite seam of the upper zone : Northern limb, Bushveld complex." Thesis, Rhodes University, 2014. http://hdl.handle.net/10962/d1013281.
Full textAbstract:
The main magnetite seam of the Upper Zone of the Rustenburg Layered Suite (SACS, 1980) on the Bushveld Complex is known to host the world‘s largest vanadium bearing titaniferous iron ores. The vanadiferous titanomagnetites, contain vanadium in sufficient concentrations (1.2 - 2.2 per cent V₂O₅) to be considered as resources and vanadium has been mined historically by a number of companies among them Anglo-American, Highveld Steel and Vanadium and VanMag Resources as well as currently by Evraz Highveld Steel and Vanadium Limited of South Africa. The titanomagnetites contain iron ore in the form of magnetite and titanium with concentrations averaging 50-75 per cent FeO and 12-21 per cent TiO₂. The titaniferous iron ores have been historically dismissed as a source of iron and titanium, due to the known difficulties of using iron ore with high titania content in blast furnaces. The economic potential for the extractability of the titaniferous magnetites lies in the capacity of the ores to be separated into iron rich and titanium rich concentrates usually through, crushing, grinding and magnetic separation. The separatability of iron oxides and titanium oxides, is dependent on the nature in which the titanium oxide occurs, with granular ilmenite being the most favourable since it can be separated from magnetite via magnetic separation. Titanium that occurs as finely exsolved lamellae or as iron-titanium oxides with low titania content such as ulvospinel render the potential recoverability of titanium poor. The Upper Zone vanadiferous titanomagnetites contain titanium in various forms varying from discrete granular ilmenite to finely exsolved lamellae as well as occurring as part of the minerals ulvospinel (Fe₂TiO₄) and titanomagnetite (a solid solution series between ulvospinel and magnetite) . Discrete ilmenite constitutes between 3-5 per cent by volume of the massive titanomagnetite ores, and between 5-10 per cent by volume of the magnetite-plagioclase cumulates with more than 50 per cent opaque oxide minerals. The purpose of this research was to investigate the mineralogical setting and distribution of the iron and titanium oxides within the magnetitite layers from top to bottom as well as spatially along a strike length of 2 000m to determine the potential for the titanium to be extracted from the titanomagnetite ores. The titanomagnetites of the Upper Zone of the Bushveld Complex with particular reference to the Northern Limb where this research was conducted contains titanium oxides as discrete ilmenite grains but in low concentrations whose potential for separate economic extraction will be challenging. The highest concentration of titanium in the magnetite ores is not contained in the granular ilmenite, but rather in ulvospinel and titanomagnetite as illustrated by the marked higher concentration of TiO₂ in the massive ores which contain less granular ilmenite in comparison to the disseminated ores which contain 3 to 8 percentage points higher granular ilmenite than the massive ores. On the scale of the main magnetite seam, the TiO₂ content increases with increasing stratigraphic height from being completely absent in the footwall anorthosite. The V₂2O₅ content also increases with stratigraphic height except for in one of the 3 boreholes where it drops with increasing height. The decrease or increase patterns are repeated in every seam. The titanomagnetites of the main magnetite seam display a variety of textures from coarse granular magnetite and ilmenite, to trellis ilmenite lamellae, intergranular ilmenite and magnesian spinels and fine exsolution lamellae of ulvospinel and ferro-magnesian spinels parallel to the magnetite cleavage. The bottom contact of the main magnetite seam is very sharp and there is no titanium or vanadium in the footwall barely 10cm below the contact. Chromium is present in the bottom of the 4 layers that constitute the main magnetite seam and it upwards decreases rapidly. In boreholes P21 and P55, there are slight reversals in the TiO₂ and V₂O₅ content towards the top of the magnetite seams.
34
Curteis, Mark Edward. "The Iron Age coinages of the south midlands, with particular reference to distribution and deposition." Thesis, Durham University, 2001. http://etheses.dur.ac.uk/1231/.
Full textAbstract:
The last twenty years has seen a great increase in the number of recorded provenance Iron Age coins. The same period has also seen advances in archaeological ideology particularly with regards to depositional processes and the inter-relationship between material assemblages and their contexts. This study re-examines existing potheseasn d developsn ew hypotheseisn light of the new data to address fundamental questions about who used iron Age coins and why A detailed catalogue ofall coins found in the south midlands is included After a review of the history of research into Iron Age coins and an overview of the development of British Iron Age coinage, particularly north of the Thames, there is a detailed look at the distributions of each major coin type found in the south midlands. The distributions have produced many interesting conclusions on the primary circulation areas of coins and hence areas of political unity, the position of possible boundaries between such areas, possible issuing authority, relative chronology and the significance of metallic content. A distribution/expansion theory has been proposed to introduce a non-stylistic approach for identifying the relative chronologies of the issues of Tasciovanus. An important part of the thesis is an archaeological study of the types of site coins are recovered from, the type, location and date of features containing coins within such sites, and detailed contextual analyses concerning material associations and position within features. From the contextual analysis it was concluded that most Iron Age coins were deposited in a deliberately structured way in specified locations, often in special votive deposits, were closely associated with other aspects religious ritual activity, and that this role continued in to the Roman period.
35
Bezuidenhout, Samantha Catherine. "The effects of age on the worker capacity and mechanisation on the task demands in a South African manufacturing industry." Thesis, Rhodes University, 2014. http://hdl.handle.net/10962/d1013167.
Full textAbstract:
The focus of the study was two-fold, firstly to determine the effect of age on the capacity of manual materials handling workers and secondly to determine the effect of increasing task mechanisation on the workers’ responses to task demands. The first component of this study, namely Part I, 101 male and 12 female ‘unskilled’ manual workers – of various ages – from a brick manufacturing industry were assessed. Anthropometric, health and strength factors were measured to improve the understanding of the South African manual worker capacity and more specifically, the effect of age on this capacity. Data collection was done between 7.30am and 9.30am in a laboratory-type setting on-site. Anthropometric characteristics (including body mass index, waist to hip ratio, waist circumference and body fat percentage) provided information on the state of obesity and the impact of age in the South African context. Linked to this, the health factors (including blood pressure, resting heart rate and a self-reported questionnaire) provide an extra snapshot of the disease profile in South Africa, and could potentially influence other capacity factors. Isometric strength capacities (of eight different areas, namely: back, leg, bicep, shoulder, pinch, pinch and pull) demonstrated whether South African manual workers show the same decline in strength with aging as seen in industrially advanced countries. The second component of the study, Part II, was performed in situ and measured the workers’ responses to task demands of three brick palletising tasks, one manual (n=21) and two with increasing mechanisation (n=12 each). Spinal kinematics, joint forces and working heart rate were assessed on normal work days during a 30-lift duration and body discomfort measures were taken at the start, middle and end of the work-shift. Spinal kinematics were measured dynamically using a lumbar motion monitor, whereas the spinal forces were estimated using the three dimensional static strength prediction program. The worker capacity results showed that waist to hip ratio, waist circumference and body fat percentage increased significantly with aging, whereas body mass index was not affected by age. All body morphology values were within ‘normal’ ranges. Although diastolic blood pressure increased significantly with age, systolic was not affected significantly by age. Both groups, however, showed an increasing prevalence of hypertension with aging. There were no significant changes in resting heart rate with aging, with a range of 66 bt.min⁻¹ to 74.86 bt.min⁻¹, therefore within normal ranges. Of the strength factors, age only affected shoulder and push strength significantly: Showing a decrease in shoulder strength from 49.89 kgF to 39.91 kgF in the men aged 20-29 to the 50-59 respectively and an increase in push strength from men aged 30-39 and 40-49 to those aged 50-59. Part II results revealed highly frequent lift rates and large degrees of sagittal flexion and lateral bending in all three tasks. These postures adopted for long durations are likely to lead to the development of musculoskeletal disorders. Heart rates of workers from the three tasks were significantly different and heart rates for two tasks were above the recommended 110 bt.min⁻¹. Similarly the body discomfort ratings of the three tasks differed, although a common trend was seen in that lower back pain was the most commonly reported area of discomfort in all tasks. South African manual materials handling males did not show the same responses to aging as men from industrially advanced countries, calling for further research into these differences. Due to the high risks of the three tasks assessed, future research and interventions are required to reduce the risk of injury in the assessed tasks.
36
Latorre-Muzzio, Gina. "The influence of geological, genetic and economic factors on the ore reserve estimation of Kwaggashoek east iron ore deposit." Thesis, Rhodes University, 1993. http://hdl.handle.net/10962/d1005584.
Full textAbstract:
Tectonics plays an important role in the genesis and subsequent mlnlng development of the Kwaggashoek East ore body. Lithological key units control the effectiveness of the ore forming processes, affecting the in situ ore reserve, The Kwaggashoek East deposit is the product of primary and secondary processes. A genetic model focussed on the source, migration and deposition of iron suggests a possible original source of iron as the product of very dilute hydrothermal input into deep ocean waters, with subsequent migration through structural conduits. Supergene processes account for the upgrading of the ore and the phosphorus redistribution. A good correlation between samples in a preliminary geostatistical study reflects the effectiveness of this process in the high grade ore zone. A broad overview of the economic issues which affect the commercialization of iron, indicates a balanced supply-demand situation for the five next years. The reserve estimation procedure requires accurate scientific terminology and appropriate methodology. Documentation is essential and should be detailed enough to allow for future reassessment. The results of three estimation methods in Kwaggashoek East differ by less than 5%. The accuracy of the final results depends more on geological interpretation and assumptions than on the method applied. Although optimization of grade and tonnage in the Kwaggashoek East deposit seems to be met with the actual cut-off grade used in the Thabazimbi mine district, the grade-quality concept introduced in this thesis indicates a decrease in the estimated reserves for the deposit
37
Tsikos, Harilaos. "Petrographic and geochemical constraints on the origin and post-depositional history of the Hotazel iron-manganese deposits, Kalahari Manganese Field, South Africa." Thesis, Rhodes University, 2000. http://hdl.handle.net/10962/d1005599.
Full textAbstract:
The giant Palaeoproterozoic manganese deposits of the Kalahari manganese field (KMF), Northern Cape Province, South Mrica, have been a world renowned resource of manganese ore for many decades. In recent years, the mineralogical composition, geochemistry and genesis of these deposits have been the objects of many geological investigations, yet their origin remains contentious up to the present day. A characteristic feature of the Kalahari deposits is the intimate association of manganese ore and iron-formation of the Superior-type, in the form of three discrete sedimentary cycles constituting the Hotazel Formation. This striking lithological association is an almost unique feature on a global scale. From that point of view, the present study is effectively the first attempt to shed light on the origin and post-depositional history of the Hotazel succession, using as prime focus the petrographic and geochemical characteristics ofthe host iron-formation. Petrographic and whole-rock geochemical information of iron-formation from the southern parts of the KMF, suggests that the Hotazel iron-formation is almost identical to other iron-formations of the world of similar age and petrological character. The rock exhibits essentially no high-grade metamorphic or low-temperature alteration effects. Mineralogically, it contains abundant chert, magnetite, subordinate amounts of silicate minerals (greenalite, minnesotaite, stilpnomelane) and appreciable concentrations of carbonate constituents in the form of coexisting calcite and ankerite. Such mineralogical composition is indicative of processes occurring in a diagenetic" to burial (up to very low-greenschist facies) metamorphic environment. Bulk-rock geochemical data point towards a simple composition with Si02, total Fe-oxide and CaO being the chief major oxide components. Whole-rock rare-earth element data suggest that the iron-formation precipitated from a water column with chemical signatures comparable to modern, shallow oceanic seawater. The virtual absence of positive Eu anomalies is a feature that compares well with similar data from Neoproterozoic, glaciogenic iron-formations of the Rapitan type, and suggests but only a dilute hydrothermal signal, poten!ially derived from distal submarine volcanic activity. Carbon and oxygen isotope data from iron-formation and Mn-bearing carbonates as well as overlying ferriferous limestone of the Mooidraai Formation, compare well with the literature. The former exhibit variable depletion relative to seawater in terms of both BC and 180, while the latter have signatures comparable to normal marine bicarbonate. Isotopic variations appear to be related to fluctuations in the amount of co-precipitated marine carbonate, in conjunction with processes of coupled organic matter oxidation - FelMn reduction in the diagenetic environment. Oxygen isotope data from quartz-magnetite-calcite triplets suggest that crystallisation took place under open-system conditions, with magnetite being the most susceptible phase in terms of fluid-rock isotopic exchange. Data also suggest that the calcite-magnetite pair may constitute a more reliable geothermometer than the quartz-magnetite one, mainly due to the interlinked diagenetic histories between calcite and magnetite. Iron-formation from the northern parts of the KMF can by categorised into three main classes, namely pristine, altered and oxidised. Pristine iron-formation is identical to the one seen in the southernmost parts of the field. Altered iron-formation corresponds to a carbonate-free derivative of intense oxidation and leaching processes at the expense ofpristine iron-formation, and contains almost exclusively binary quartz-hematite mixtures. The rock appears to have lost essentially its entire pre-existing carbonate-related components (i.e., Ca, Mg, Sr, most Mn and Ba) and displays residual enrichments in elements such as Cr, Th, V, Ni and Pb, which would have behaved as immobile constituents during low-temperature alteration. The low temperature origin of altered iron-formation is supported by oxygen isotope data from quartz-hematite pairs which indicate that isotopically light hematite would have derived from oxidation of magneftte and other ferroussilicate compounds in the presence of a low-temperature meteoric fluid, while quartz would have remained isotopically unchanged. Occasional occurrences of acmite-hematite assemblages suggest localised metasomatic processes related to the action ofNaCI-rich fluids at the expense of altered iron-formation. The conditions of acmite genesis are very poorly constrained due to the very broad stability limits of the mineral in environments ranging from magmatic to surface-related. Oxidised iron-formation constitutes a distinct rock-type and shares common attributes with both the pristine and the altered iron-formation. The rock contains hematite as an important constituent while the amount of magnetite is substantially reduced. With regard to carbonate nlinerals, calcite contents are clearly very low or absent, having being replaced in most instances by a single, Mgenriched, dolomite/ankerite:type species. Oxidised iron-formation contains somewhat higher amounts of iron and reduced amounts of Sr and Ba relative to pristine iron-formation, whereas enrichments in elements such as Ni, Th, Pb, Cr, and V are seen, similar to altered iron-formation. Oxidised iron-formation appears to have originated from processes of dissolution-mobilisationreprecipitation of solutes derived primarily from leaching that produced altered iron-formation. It is proposed that the Hotazel iron-formation and associated manganese deposits were formed as a result of episodic sea-level fluctuations in a stratified depositional environment that gradually evolved into a shallow carbonate platform. A critical parameter in the development of manganese sediment may include regional climatic patterns related to a glacial event (Makganyene diamictite) prior to deposition of the Hotazel strata. This suggestion draws parallels with processes that are believed to have led to the formation of worldwide iron-formations and associated manganese deposits subsequent to Neoproterozoic episodes of glaciation. Submarine volcanism related to the underlying Ongeluk lavas appears to have had very little (if any) metallogenic significance, while evidence for a sudden rise in the oxygen contents of the atmosphere and ambient waters is lacking. With regard to later alteration processes, combination of geological and geochemical data point towards the potential influence of surface weathering prior to deposition of rocks of the unconformably overlying Olifantshoek Supergroup, possibly coupled with fault- and/or thrustcontrolled fluid-flow and leaching of the Hotazel succession during post-Olifantshoek times.
38
Kasere, Gayle Farai. "Cash transfers and poverty reduction in South Africa: a case study of old age pensions." Thesis, Rhodes University, 2012. http://hdl.handle.net/10962/d1003109.
Full textAbstract:
Social assistance in the form of cash grants is a large and fiscally costly component of anti-poverty policy in South Africa. A critical question arises: Are the grants effective tools for reducing poverty in South Africa and, moreover, how significant is their impact on poverty? As a measure of reducing poverty, the government has expanded the social grants system since the advent of the new democracy in 1994. The country's social grant system is quite comprehensive and it is intended to cover vulnerable individuals over their life course from childhood to adulthood and into old age. Policy discourse surrounding the grants centres on the sustainability of the system and its implications for socio-economic development and poverty alleviation. It is therefore important that the significance of grants is identified and assessed particularly in relation to very poor households. This dissertation focuses specifically on one particular grant, namely, the old age pension. It does so in the context of the sustainable livelihoods conceptual framework and the history of the social grant system in South Africa. Statistical data collected by the South African government as well as more localised evidence gathered in the Eastern Cape town of Grahamstown is used to ascertain the significance of old age pensions for poverty reduction. While there is some evidence to suggest that pensions contribute to poverty reduction, this does not translate into poverty alleviation. In fact, there is some unevenness in the impact of pensions on poverty. In this regard, the decision-making structures in poor households regularly influence the way pension money is allocated and used within households. Grant money is normally shared in extended households, such that the pension does not simply benefit the recipient but the recipient's household as a whole. Although there is cause for concern regarding the propensity of social grants to affect people's behaviour negatively, there is a case to be made for retaining grants as an important, though not the only, form of anti-poverty strategy. This highlights the need for continued research on the social grant system and pensions more specifically.
39
Opuwari, Mimonitu. "Petrophysical evaluation of the albian age gas bearing sandstone reservoirs of the o-m field, orange basin, South Africa." Thesis, University of the Western Cape, 2010. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_7221_1380806808.
Full textAbstract:
Petrophysical evaluation of the Albian age gas bearing sandstone reservoirs of the O-M field, Offshore South Africa has been performed. The main goal of the thesis is to evaluate the reservoir potentials of the field through the integration and comparison of results from core analysis, production data and petrography studies for the evaluation and correction of key petrophysical parameters from wireline logs which could be used to generate an effective reservoir model. A total of ten wells were evaluated and twenty eight sandstone reservoirs were encountered of which twenty four are gas bearing and four are wet within the Albian age depth interval of 2800m to 3500m. Six lithofacies (A1, A2, A3, A4, A5 and A6) were grouped
according to textural and structural features and grain size from the key wells (OP1, OP2 and OP3). Facies A6 was identified as non reservoir rock in terms of reservoir rock quality and facies A1 and A2 were regarded as the best reservoir rock quality. This study identifies the different
rock types that comprise reservoir and non reservoirs. Porosity and permeability are the key parameters for identifying the rock types and reservoir characterization. Pore throat radius was estimated from conventional core porosity and permeability with application of the Winland&rsquo
s method for assessment of reservoir rock quality on the bases of pore throat radius. Results from the Winland&rsquo
s method present five Petrofacies (Mega porous, Macro porous, Meso porous, Micro porous and Nanno porous). The best Petrofacies was mega porous rock type which corresponds to lithofacies A1 and A2. The nano porous rock type corresponds to lithofacies A6 and was subsequently classified as non reservoir rock. The volume of clay model from log was taken from the gamma-ray model corrected by Steiber equations which was based on the level of agreement between log data and the x-ray diffraction (XRD) clay data. The average volume of clay determined ranged from 1 &ndash
28 %. The field average grain density of 2.67 g/cc was determined from core data which is representative of the well formation, hence 2.67 g/cc was used to estimate porosity from the density log. Reservoir rock properties are generally good with reservoir average porosities between 10 &ndash
22 %, an average permeability of approximately 60mD. The laterolog resistivity values have been invasion corrected to yield estimates of the true formation resistivity. In general, resistivities of above 4.0 Ohm-m are productive reservoirs, an average water resistivity of 0.1 Ohm-m was estimated. Log calculated water saturation models were calibrated with capillary pressure and conventional core determined water saturations, and the Simandoux shaly sand model best agree with capillary and conventional core water saturations and was used to determine field water saturations. The reservoir average water saturations range between 23 &ndash
69 %. The study also revealed quartz as being the dominant mineral in addition to abundant chlorite as the major clay mineral. The fine textured and dispersed pore lining chlorite mineral affects the reservoir quality and may be the possible cause of the low resistivity recorded in the area. The reservoirs evaluated in the field are characterized as normally pressured with an average reservoir pressure of 4800 psi and temperature of 220 º
F. An interpreted field aquifer gradient of 0.44 psi/ft (1.01 g/cc) and gas gradient of 0.09 psi/ft (0.2 g/cc) were obtained from repeat formation test measurements. A total of eight gas water contacts were identified in six wells. For an interval to be regarded as having net pay potential, cut-off values were used to distinguish between pay and non-pay intervals. For an interval to be regarded as pay, it must have a porosity value of at least 10 %, volume of clay of less than 40 %, and water saturation of not more than 65 %. A total of twenty four reservoir intervals meet the cut-off criteria and was regarded as net pay intervals. The gross thickness of the reservoirs range from 2.4m to 31.7m and net pay interval from 1.03m to 25.15m respectively. In summary, this study contributes to scale transition issues in a complex gas bearing sandstone reservoirs and serves as a basis for analysis of petrophysical properties in a multi-scale system.
40
Nolte, Zianca. "The natural history of the humpback dolphin, Sousa chinensis, in KwaZulu-Natal, South Africa : age, growth and reproduction." Thesis, Rhodes University, 2014. http://hdl.handle.net/10962/d1013178.
Full textAbstract:
Globally, inshore cetaceans are being threatened by a number of anthropogenic activities. The Indo-Pacific humpback dolphin, Sousa chinensis, is currently listed as ‘near threatened’ by the International Union for the Conservation of Nature (IUCN). In order to be able to advise on management and conservation strategies, knowledge on the life history of the species is required. To date very little is known about the biology of humpback dolphins. The aim of the present study was to determine basic life history parameters, including age, growth and reproduction of humpback dolphins incidentally caught in shark nets. Age was estimated by counting the growth layer groups (GLGs) in the dentine and cementum of sectioned and stained teeth. Both a Von Bertalanffy and a Gompertz growth curve fitted well to the data, but for comparison with previous studies on Sousa, the Gompertz growth function was adopted to describe the relationship between length and age for KwaZulu-Natal populations. Length at birth was estimated between 104.33 and 111.57 cm for males and females, respectively. Asymptotic length was reached at 266.48 cm and 239.29 cm for males and females, respectively. This corresponds to the attainment of physical maturity at 24 GLGs in males and 16 GLGs in females. Asymptotic mass for males could not be determined, while for females it occurred around 160 kg. The maximum age estimates and recorded lengths were 24 GLGs and 279 cm for males and 17.7 GLGs and 249 cm for females. Differences in length-at-age and mass-at-age for S. chinensis suggest sexual dimorphism. The attainment of sexual maturity in males occurred between 9 and 10 GLGs, corresponding to 230 cm total body length and 140 kg. The maximum combined testis mass of mature males comprised 0.42% of total body mass, and a roving male mating system was proposed. In females, sexual maturity occurred around 7.6 GLG, between 220 and 222 cm and 104 - 140 kg. The ovulation rate is estimated at 0.2 ovulations per annum, suggesting a calving interval of five years. It is evident from the results obtained in the present study that geographical differences exist in the life history parameters of S. chinensis. As a result, regional conservation and management strategies are imperative. Results from this study can therefore assist in assessing the status of existing population structures in the KwaZulu-Natal coastal waters, and the implementation of regional mitigation strategies to ensure the continued survival of humpback dolphins in the region.
41
Sihlezana, Nothando Daphne. "Information management in the age of E-government - the case of South Africa." Thesis, Link to the online version, 2006. http://hdl.handle.net/10019/125.
Full text
42
Van, Niekerk Karen Loise. "Marine fish exploitation during the middle and later Stone Age of South Africa." Doctoral thesis, University of Cape Town, 2011. http://hdl.handle.net/11427/12238.
Full textAbstract:
Includes abstract.Includes bibliographical references (p. 298-335).
Marine fish remains are not common in Middle Stone Age (MSA) sites in Africa. There are currently only two known MSA sites with good organic preservation in South Africa that contain marine fish remains in relatively high numbers: Blombos Cave (BBC) and Klasies River main site (KR). Marine fish exploitation is considered by some researchers as a marker of modern human behaviour, requiring cognitive and technological capacities thought to have only appeared after 50 000 years ago, during the Later Stone Age (LSA).
43
Polteau, Stéphane. "The early proterozoic Makganyene glacial event in South Africa : its implication in sequence stratigraphy interpretations, paleoenvironmental conditions and iron and manganese ore deposition." Thesis, Rhodes University, 2005. http://hdl.handle.net/10962/d1007612.
Full textAbstract:
The Makganyene Formation forms the base of the Postmasburg Group in the Transvaal Supergroup in the Griqualand West Basin. It consists of diamictites, sandstones, banded iron-formations (BIFs), shales, siltstones and carbonates. It is generally accepted that the Makganyene Formation rests on an erosive regional unconformity throughout the Northern Cape Province. However this study demonstrates that this stratigraphic relationship is not universal, and conformable contacts have been observed. One of the principal aims of this study is to identify the nature of the Makganyene basal contact throughout the Griqualand West Basin. Intensive fieldwork was carried out from Prieska in the south, to Danielskuil in the north. In the Sishen and Hotazel areas, only borehole material was available to assess the stratigraphy. The Griquatown Fault Zone delimits the boundary between the deep basin and platform facies. The Koegas Subgroup is only present south of the Griquatown Fault Zone, where it pinches out. However, the transition Griquatown BIFs-Koegas Subgroup occurs in lacustrine deposits on the Ghaap platform (Beukes, 1983). The Griquatown Fault Zone represents the edge of the basin, which corresponds to a hinge rather than a fault zone. The Makganyene Formation rests with a conformable contact on the Koegas Subgroup south of the Griquatown Hinge Zone, and north of it the Makganyene Formation lies unconformably on the Asbestos Hills Subgroup. The Makganyene Formation displays lateral facies changes that reflect the paleogeography of the Griqualand West Basin, and the development of ice sheets/shelves. The Ghaap platform is characterised by coarse immature sand interbedded with the diamictites. The clasts in this area contain local Asbestos Hills material and no dropstones are present. Such settings are typical of sediments that are being deposited below a grounded ice mass. At the Griquatown Hinge Zone, the sandstone lenses are smaller, and the clasts consist of chert, of which a great number are striated and faceted. In the Matsap area, the presence of dropstones is strong evidence for the presence of a floating ice shelf that released its material by basal melting. Further south, the Makganyene Formation contains stromatolitic bioherms that only form if clastic contamination is minimal and therefore the ice that transported the detritus to the basin did not extend far into open sea conditions. The base of the Hotazel Formation also contains diamictite levels. Dropstones have been identified, implying a glacial origin. The Hotazel diamictites are interbedded with hyaloclastites and BIFs. The Makganyene glacial event, therefore, was not restricted to the Makganyene Formation, but also included the Ongeluk Formation, through to the base of the Hotazel Formation. Petrographic studies of the Makganyene Formation and the base of the Hotazel Formation reveal mineral assemblages that are diagnostic of early to late diagenetic crystallisation and of low-grade metamorphism not exceeding the very low green-schist facies. The facies identified display the same sense of basin deepening, from shallow high-energy Hotazel area on the Ghaap platform, to the deep basin in the Matsap area. Whole-rock geochemical analyses reveal that the elemental composition of the Makganyene Formation is very similar to that of the Asbestos Hills BIFs, which were the most important source of clastic detritus for the Makganyene Formation. However, minor amounts of carbonates of the Campbellrand Subgroup, as well as a felsic crustal input from the Archean granitoid basement, made contributions. On the Ghaap platform, the Makganyene diamictite is enriched in iron, calcium, and magnesium, while in the deeper parts of the basin the diamictites are enriched in detrital elements, such as titanium and aluminium, which occur in the fine clay component. The Hotazel diamictite displays a distinct mafic volcanic input, related to the extrusion of the Ongeluk basaltic andesites, which was incorporated in the glacial sediments. Sequence stratigraphy is based on the recognition of contacts separating the different systems tracts that compose a depositional sequence. However, because the basal contact of the Makganyene Formation has not been properly identified in previous work, no correct model has been proposed so far. Therefore correlations between the Griqualand West and the Transvaal basins, based on lithostratigraphic similarities and extrapolations of unconformities, have to be reviewed, especially since the publication of new radiometric ages contradict all previously proposed correlations. It is proposed here that the Transvaal Supergroup in the Griqualand West Basin represents a continuous depositional event that lasted about 200 Ma. The Makganyene glacial event occurred during changing conditions in the chemistries of the atmosphere and ocean, and in the continental configuration. A Snowball Earth event has been proposed as the causative process of such paleoenvironmental changes. However, evidence presented here of less dramatic glacial conditions, with areas of ice-free waters, implies an alternative to the Snowball Earth event. The paleoenvironmental changes are thought to represent a transition from an anaerobic to aerobic atmosphere, that was responsible for the global cooling of the surface of the Earth, Such a glacial event may have aided in the large-scale precipitation of iron and manganese in areas of intense upwellings.
44
Barnes, Andrew. "A financial planning model for retirement, taking into account the impact of pre-retirement funding income, age and taxation." Thesis, Rhodes University, 2006. http://hdl.handle.net/10962/d1004532.
Full textAbstract:
Individuals are often not aware of the required level of contributions needed to fund a retirement savings plan. This problem is compounded by the fact that the assistance provided to these individuals by way of commercially-available retirement planning models does not take into account the effect of income tax on the level of required retirement savings contributions and recent changes in the tax legislation to the income tax payable by individuals has had a significant effect on these required levels. As a preamble to the research process, an exploratory questionnaire was administrated to a sample of individuals, which was designed to measure the level of awareness of these individuals of the contributions to a retirement savings plan needed to fund their postretirement financial needs, and of the impact of age, the level of income and income tax on their contributions. Responses to the questionnaire indicated a low level of awareness of retirement planning amongst these individuals. A retirement planning model was then designed to test the effect of earnings, age and changes in tax legislation on the level of an individual's required monthly contributions to a retirement savings plan. Independent variables of age and income were processed using the model. These same variables were then processed using the Old Mutual and Liberty Life retirement planning models and a comparison was made between the model developed in the research and these commercially developed models, to assess their usefulness and limitations. Based on the above comparison, it appeared that the Old Mutual and Liberty Life retirement models both included the effects of the individual marginal tax rates in their calculations. However, they appeared to be using marginal tax rates which were higher than those reflected in the 2006 individual income tax tables. In addition these models did not include the effect of income tax exemptions and deductions and they therefore provided more conservative estimates than the retirement planning model designed in the research. Recent tax adjustments have had the effect of greatly increasing the after-tax income of individuals and therefore it is important to include the effects of changes in tax legislation in determining the monthly contributions to a retirement savings plan.
45
Hubbard, Nicola N. "Holocene settlement strategies in the Western Cape, South Africa : an environmental approach." Thesis, University of Oxford, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.254006.
Full text
46
Muguti, Elizabeth Zivai. "Energy efficiency in the iron and steel industry : cases of Zimbabwe and South Africa." Master's thesis, University of Cape Town, 2004. http://hdl.handle.net/11427/13960.
Full textAbstract:
Includes bibliographical references.This study looks at possible improvements of energy efficiency in the iron and steel industry in Zimbabwe and the case of South Africa is studied also for comparison. Data required was obtained through field visits and international databases. The fieldwork findings, analysis and published literature contributed to the conclusions and recommendations. There is a relationship between technology advancement, energy efficiency and energy intensity. The more modern technology a country's steel industry adopts the more energy efficient it becomes and so lowers its energy intensity. Countries such as South Korea, Japan and Germany have adopted modern technologies and they are among the most efficient steel producers and have the lowest energy intensities while India and China have low levels of modern technologies, low efficiencies and high intensities. ZISCO, the iron and steel industry of Zimbabwe has a relatively high energy intensity (closer to China and India) compared to South Africa and other developing country producers. ZISCO has both new and old technology while industry in South Africa, which has retired most old technology and closed all its less efficient plants, is largely using new and even state of the art technology in some of its plants. In Zimbabwe the national economic and industrial policies have had negative impacts on the growth and development of its iron and steel industry. ZISCO needs policies that support the adoption of energy efficient technology, create a level playing field for downstream steel industries since ZISCO has the potential to influence growth of this sector and the sector has prospects for significant foreign currency earnings. The study recommends a restructuring of ZISCO to improve productivity, and energy efficiency through replacement of old technologies in the medium to long term and implementation of some identified less capital-intensive options that are typical in an integrated steel mill.
47
Nyamushosho, Robert Tendai. "Living on the margin?: The Iron Age communities of Mananzve Hill, Shashi region, South-western Zimbabwe." Master's thesis, University of Cape Town, 2017. http://hdl.handle.net/11427/24451.
Full textAbstract:
In conventional reconstructions of the Iron Age archaeology of southern Africa, drylands have long been viewed as marginal landscapes that did not host any significant agropastoral communities in the past. Against this background, this study explores the discourse of dryland marginality in southern Zambezia using the Shashi region as a case study. Archaeological surveys and excavations were conducted to retrieve reliable data for establishing the settlement history and adaptation strategies of Iron Age communities that lived in this landscape. The study was guided by the concepts of vulnerability, adaptation and resilience, as well as landscape archaeology. Results from excavations conducted at Mananzve, one of the surveyed and excavated sites, show that this part of the Shashi region has a long settlement history spanning the Early Iron Age and the Later Iron Age. Analyses of the recovered material culture shows that Iron Age communities that resided at Mananzve adapted various methods of indigenous dryland agriculture to maintain food security. These findings show that adaptation is context-specific and challenge the designation of drylands such as the Shashi region as 'marginal', since that term undermines the adaptive capacity and resilience of Iron Age communities.
48
Gapara, Cornwell Sine. "A review of the deposition of iron-formation and genesis of the related iron ore deposits as a guide to exploration for Precambrian iron ore deposits in southern Africa." Thesis, Rhodes University, 1993. http://hdl.handle.net/10962/d1005610.
Full textAbstract:
Iron-formations are ferruginous sedimentary rocks which have their source from fumarolic activity associated with submarine volcanism, with deposition of iron as oxides, hydroxides, and hydrous oxide-silicate minerals in shallow and/or deep marine sedimentary systems. The Precambrian ironformations of southern Africa have a wide age range, but are more prominently developed before 1.SGa. These iron formations occur in greenstone belts of the Kaapvaal and Zimbabwean cratons, in the Limpopo mobile belt, in cratonic basins and in the Damara mobile belt. The Archaean-Proterozoic sedimentary basins and greenstone belts host iron ore deposits in iron-formation. Iron formations have a lengthy geological history. Most were subjected to intense, and on occasions repeated, tectonic and metamorphic episodes which also included metasomatic processes at times to produce supergene/hypogene high grade iron ores. Iron-formations may be enriched by diagenetic, and metamorphic processes to produce concentrating-grade ironformations. Uplift, weathering and denudation, have influenced the mineral association and composition of the ores, within which magnetite, haematite and goethite constitute the major ore minerals. The iron resources of the southern Africa region include the Sishen deposits, hosting to about 1200 Mt of high grade direct shipping ore, at >63% Fe. Deposits of Zimbabwe have more than 33 000 Mt of beneficiable iron-formation. The evaluation of an iron ore prospect involves many factors which must be individually assessed in order to arrive at an estimate of the probable profitability of the deposit. Many of these are geological and are inherent in the deposit itself. Other factors are inherent aspects of the environment in which the ore is formed. Although the geological character of the ore does not change, technological advances in the processing techniques may have a great effect on the cost of putting the ore into marketable form. Geochemical, geophysical and remote sensing methods would be used for regional exploration. Chip sampling and drilling are useful for detailed exploration. Purely geological exploration techniques are applicable on a prospect scale in the exploration of iron ore deposits. Regional exploration targeting should choose late Archaean greenstone belts containing oxide facies iron-formation or Early Proterozoic basins located at craton margins as they are both known to host high-grade haematite orebodies formed by supergene/hypogene enrichment. Most types of iron ore deposits in southern Africa are described and classified. An attempt is made to emphasize the major controls on mineralisation, in the hope that these may be applicable to exploration both in the southern African region and within analogous settings around the world.
49
Halkett, D. J. "Spatial distribution of artefacts from excavations at Putslaagte 41 : evidence for social organisation on a late Holocene site, south western Cape, South Africa." Thesis, University of Cape Town, 1991. http://hdl.handle.net/11427/26075.
Full text
50
Saitowitz, Sharma Jeanette. "Glass beads as indicators of contact and trade in Southern Africa ca. AD 900 - AD 1250." Doctoral thesis, University of Cape Town, 1996. http://hdl.handle.net/11427/19418.
Full textAbstract:
Luxury goods, used in mediaeval long distance trade ca. AD 900-1250, found an important market among the Iron Age peoples of southern Africa. Indirect evidence of this trade can be seen in the form of archaeological collections of glass beads at sites throughout Africa and Southeast Asia. Thousands of beads have been found at Iron Age sites in the eastern Transvaal Lowveld and at inland sites along the Limpopo Valley and in Botswana. Similar looking types of beads, referred to as small seed beads, were also used in the Muslim mercantile networks and maritime trade in the Indian Ocean, and have been found at coeval sites throughout Southeast Asia, particularly at entrepot ports in India, eastern and western Malaysia and Thailand. At the commencement of the Iron Age occupation of southern African sites, glass beads of any kind were very rare. From ca. AD 900-1000, Islamic influences spread southward along the African east coast. This coincided with the marked increase of glass beads found in southern Africa. Their presence is direct evidence of foreign industry, external trade and contact. The beads are widely believed to have originated in India, and to have been distributed through Arab traders in the Indian Ocean. Exports would have included gold, possibly ivory, and other raw materials. Archaeology has much to contribute towards documenting these activities. The identity and location of the bead sources is important to an understanding of early contact and economic and political developments in southern Africa. The trade connection coincided with the beginning of a critical sequence of events in the cultural history of southern Africa, which culminated in the formation of an incipient state at Great Zimbabwe (AD 1250-1450) from precursors at Mapungubwe and related sites. This period corresponds in time with an important episode in Islamic history, when Muslims conquered Egypt and the Fatimids moved their capital eastwards, in AD 969, from Tunisia to al-Qahira (Cairo) next to the well-established cosmopolitan port entrepot of al- Fustat (now old Cairo). Texts, chronicles, glass weights, scribal notes and receipts confirm that it was already a successful industrial centre with a history of glass-making when the Fatimids gained control of Egypt. In this thesis I have addressed two aspects of research to investigate the trade networks associated with internal and foreign contact: (1) the manufacturing origins of the beads, and, (2) who brought them to southern Africa. Glass material from Egypt, Palestine, Syria and Southeast Asia was used for comparison, and as possible source material. Scientific techniques were used to confirm these operations. The beads were described, classified, and sampled selectively for physical and chemical analysis. Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) was used to determine the rare earth elements (REE) composition. The results show that a particular glass, used to make beads in Egypt, is the same as that used to make some of the beads found at sites in the northern and eastern Transvaal. They document the existence of a trade link with the Mediterranean via the Red Sea 1000 years ago. Until now, both the origin of this contact and the extent of indigenous responses were largely unknown. These findings cast a different light on maritime trade along the east coast of Africa from a millennium ago.
Bibliography: pages 175-190.