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Dissertations / Theses on the topic 'Geology, Stratigraphic – Archaean'

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Published: 4 June 2021

Last updated: 20 February 2023

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1

Lane, Monica Leonie. "Nickel sulphide mineralization associated with Archean komatiites." Thesis, Rhodes University, 1992. http://hdl.handle.net/10962/d1005594.

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The distribution of Archean Nickel sulphide deposits reflects tectonic controls operating during the evolution of the granitoid greenstone terrains. Important deposits of komatiitic-affinity are concentrated within, and adjacent to, younger (∼2.7 Ga), rift-related greenstone belts (e.g. Canada, Western Australia and Zimababwe). Two important classes of Archean Nickel sulphide deposits exist, formerly known as "Dunitic" and "Peridotitic", these are now referred to as Group I and Group II deposits, based on their characteristic structure and composition. Mineralization varies from massive and ma

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2

Green, Michael Godfrey. "Early archaean crustal evolution evidence from 3̃.5 billion year old greenstone successions in the Pilgangoora Belt, Pilbara Craton, Australia /." Connect to full text, 2001. http://hdl.handle.net/2123/505.

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Thesis (Ph. D.)--University of Sydney, 2002.<br>Title from title screen (viewed Apr. 23, 2008). Submitted in fulfilment of the requirements for the degree of Doctor of Philosophy to the School of Geosciences, Division of Geology and Geophysics. Degree awarded 2002; thesis submitted 2001. Includes bibliography. Also available in print form.

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3

Rivard, Benoit. "Petrochemistry of a layered Archean magma chamber and its relation to models of basalt evolution." Thesis, McGill University, 1985. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=66046.

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4

Fedo, Christopher M. "Geologic evolution of the Archean Buhwa Greenstone Belt and surrounding granite-gneiss terrane, southcentral Zimbabwe." Diss., This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-06062008-164845/.

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5

Skulski, Thomas. "The tectonic and magmatic evolution of the central segment of the Archean La Grande greenstone belt, central Québec /." Thesis, McGill University, 1985. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=65986.

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6

Green, Michael Godfrey. "Early Archaean crustal evolution: evidence from ~3.5million year old greenstone successions in the Pilgangoora Belt, Pilbara Craton, Australia." Thesis, The University of Sydney, 2001. http://hdl.handle.net/2123/505.

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In the Pilgangoora Belt of the Pilbara Craton, Australia, the 3517 Ma Coonterunah Group and 3484-3468 Ma Carlindi granitoids underlie the 3458 Ma Warrawoona Group beneath an erosional unconformity, thus providing evidence for ancient emergent continental crust. The basalts either side of the unconformity are remarkably similar, with N-MORB-normalised enrichment factors for LILE, Th, U and LREE greater than those for Ta, Nb, P, Zr, Ti, Y and M-HREE, and initial e(Nd, Hf) compositions which systematically vary with Sm/Nd, Nb/U and Nb/La ratios. Geological and geochemical evidence shows that the

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7

Brocks, Jochen J. "Molecular fossils in Archean rocks." Phd thesis, School of Geosciences, 2001. http://hdl.handle.net/2123/14300.

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8

Barovich, Karin Marie. "Behavior of lutetium-hafnium, samarium-neodymium and rubidium-strontium isotopic systems during processes affecting continental crust." Diss., The University of Arizona, 1991. http://hdl.handle.net/10150/185602.

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Combined Lu-Hf, Sm-Nd and Rb-Sr isotopic studies of continental crustal rocks were undertaken to assess the relative effects of secondary crustal processes on isotopic systematics of whole-rock systems. The processes studied include ductile deformation, and three cases of hydrothermal alteration, involving fluids of varying composition. The Rb-Sr system proved to be easily disturbed during all secondary processes, while Sm-Nd and Lu-Hf systems were, for the most part, resilient. These results show that Nd or Hf isotopic information obtained from old rocks that have undergone typical crustal de

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9

Hodkiewicz, Paul. "The interplay between physical and chemical processes in the formation of world-class orogenic gold deposits in the Eastern Goldfields Province, Western Australia." University of Western Australia. Centre for Global Metallogeny, 2003. http://theses.library.uwa.edu.au/adt-WU2004.0057.

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[Formulae and special characters can only be approximated here. Please see the pdf version of the abstract for an accurate reproduction.] The formation of world-class Archean orogenic gold deposits in the Eastern Goldfields Province of Western Australia was the result of a critical combination of physical and chemical processes that modified a single and widespread ore-fluid along fluid pathways and at the sites of gold deposition. Increased gold endowment in these deposits is associated with efficient regional-scale fluid focusing mechanisms and the influence of multiple ore-depositional pr

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10

Delvigne, Camille. "The Archaean silicon cycle insights from silicon isotopes and Ge/Si ratios in banded iron formations, palaeosols and shales." Doctoral thesis, Universite Libre de Bruxelles, 2012. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209652.

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The external silicon cycle during the Precambrian (4.5-0.5 Ga) is not well understood despite its key significance to apprehend ancient dynamics at the surface of the Earth. In the absence of silicifying organisms, external silicon cycle dramatically differs from nowadays. Our current understanding of Precambrian oceans is limited to the assumption that silicon concentrations were close to saturation of amorphous silica. This thesis aims to bring new insights to different processes that controlled the geochemical silicon cycle during the Archaean (3.8-2.5 Ga). Bulk rock Ge/Si ratio and Si isot

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11

Said, Nuru. "Geochemistry of the Neoarchean mafic volcanic and intrusive rocks in the Kalgoorlie Terrane, eastern Yilgarn, Western Australia : implications for geodynamic setting." University of Western Australia. School of Earth and Environment, 2009. http://theses.library.uwa.edu.au/adt-WU2009.0156.

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[Truncated abstract] The Neoarchean (2800 to 2600 Ma) Eastern Goldfields Superterrane (EGST) comprises elongated belts of deformed and metamorphosed volcanic and sedimentary rocks intruded by granitoids. The Superterrane is made up of five distinct tectonostratigraphic terranes. From west to east these are the Kalgoorlie, Gindalbie, Kurnalpi, Laverton and Duketon Terranes. The Kalgoorlie Terrane is characterised by 2720 to 2680 Ma marine mafic-ultramafic volcanic successions interlayered with, and overlain by, 2710 to 2660 Ma dominantly trondhjemite-tonalite-dacite (TTD) dacititic volcaniclast

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12

Kranidiotis, Prokopis. "Geology, geochemistry and hydrothermal alteration at the Phelps Dodge massive sulfide deposit, Matagami, Québec." Thesis, McGill University, 1985. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=66033.

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13

Salier, Brock Peter. "The timing and source of gold-bearing fluids in the Laverton Greenstone Belt, Yilgarn Craton, with emphasis on the Wallaby gold deposit." University of Western Australia. School of Earth and Geographical Sciences, 2004. http://theses.library.uwa.edu.au/adt-WU2005.0013.

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[Truncated abstract] The Laverton Greenstone Belt (LGB), located in the northeastern part of the Eastern Goldfields Province (EGP) of the Yilgarn Craton, Western Australia, has a total contained gold endowment of over 690t. An important feature of the gold deposits in the LGB is their close spatial association with granitoids, with many gold deposits located adjacent to, or hosted by, granitoids. Recently-proposed genetic models for Archaean orogenic gold deposits have emphasised the role of granitoids in the formation of ore-deposits, but differ significantly in the nature of that role. Some

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14

Laurie, Angelique. "The formation of Earth’s early felsic continental crust by water-present eclogite melting." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/80214.

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Thesis (PhD)--Stellenbosch University, 2013.<br>ENGLISH ABSTRACT: The sodic and leucocratic Tonalite, Trondhjemite and Granodiorite (TTG) granitoid series of rocks characterise Paleo- to Meso- Archaean felsic continental crust, yet are uncommon in the post-Archaean rock record. Consequently, petrogenetic studies on these rocks provide valuable insight into the creation and evolution of Earth’s early continental crust. The highpressure (HP)-type of Archaean TTG magmas are particularly important in this regard as their geochemistry requires that they are formed by high-pressure melting of a

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15

Drieberg, Susan L. "The magmatic-hydrothermal architecture of the Archean Volcanic Massive Sulfide (VMS) System at Panorama, Pilbara, Western Australia." University of Western Australia. School of Earth and Geographical Sciences, 2003. http://theses.library.uwa.edu.au/adt-WU2004.0064.

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[Truncated abstract. Formulae and special characters can only be approximated here. Please see the pdf version of this abstract for an accurate representation.] The 3.24 Ga Panorama VMS District, located in the Pilbara Craton of Western Australia, is exposed as a cross-section through subvolcanic granite intrusions and a coeval submarine volcanic sequence that hosts Zn-Cu mineralization. The near-complete exposure across the district, the very low metamorphic grade, and the remarkable preservation of primary igneous and volcanic textures provides an unparalleled opportunity to examine the P-

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16

Liu, Mian. "Migmatization and volcanic petrogenesis in the La Grande greenstone belt, Quebec." Thesis, McGill University, 1985. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=63353.

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17

Nicoli, Gautier. "The metamorphic and anatectic history of Archaean metapelitic granulites from the South Marginal Zone, Limpopo Belt, South Africa." Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/97041.

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Thesis (DSc)--Stellenbosch University, 2015.<br>ENGLISH ABSTRACT: Anatexis is the first step in granite genesis. Partial melting in the lower crust may produce leucoratic features of unusual chemical compositions, very different from the final products of crustal differentiation. Therefore, the links that exists between some migmatites and crustal-derived granites can be ambiguous. This study is an investigation of the anatectic history of a high-grade terrain: the Southern Marginal Zone of the Limpopo Belt (SMZ), north to the Kaapvaal Craton in South Africa. The work involved an integrat

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18

Mengel, Flemming Cai. "Thermotectonic evolution of the Proterozoic-Archaean boundary in the Saglek area, northern Labrador /." 1987. http://collections.mun.ca/u?/theses,91862.

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19

Langsford, N. "Long structural zones in the Archaean Yilgarn Craton, Western Australia." Thesis, 1994. https://eprints.utas.edu.au/20343/7/whole_LangsfordNick1995.pdf.

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Eight structural zones from 250km to 800km long, traverse the granite-greenstone terrane of the Eastern Goldfields and Murchison districts of the Yilgam Craton. The structural zones, herein called LSZ, (long structural zones) have been traced using 1 :500,000 geological compilations and AGSO (Australian Geological Survey Organisation) aeromagnetic and gravity data. LSZ are complex linear deformation zones, resulting in the reactivation of structures formed prior to a craton wide shortening episode. Some of the pre-existing structures are interpreted as low angle extensional features, po

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20

"An integrated field, geochemical and geochronological study of archaean rock units in Southern Swaziland." Thesis, 2015. http://hdl.handle.net/10210/13700.

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M.Sc. (Geology)<br>This study represents the first detailed field, geochemical and geochronological study of Archaean rock units that crop out along the Ncotshane River in the southern part of Swaziland. These rock units were mapped as Mahamba Gneiss in the geological map of Swaziland (Wilson, 1982). However, field examination indicated that the area consists of a heterogeneous assemblage of serpentinite, amphibolite, gabbroic gneiss, quartzite, meta-ironstone, augen gneiss, granitic gneiss and diorite, all of which are intimately associated with weakly foliated granite and dolerite. Serpentin

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21

Nhleko, Noah. "Stratigraphy of the Archean Mozaan Group in the Kubuta-Mooihoek area, Swaziland." Thesis, 2012. http://hdl.handle.net/10210/6405.

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M.Sc.<br>Known outcrops of the supracrustal Mesoarchean Mozaan Group of the Pongola Supergroup occur in north-eastern Kwazulu-Natal and southern Mpumalanga in South Africa, and southern Swaziland. Outcrops of the Mozaan succession in Swaziland are preserved in the Ntungulu-Mahlangatsha and Kubuta-Mooihoek areas. The succession is composed of polymictic conglomerate, poorly sorted scour based quartzite, orthoquartzite, shale, iron-formation, polymictic diamictite and lava. In the Kubuta- Mooihoek area a 3000m thick succession is preserved and correlates almost bed for bed with that in the Hartl

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22

Kohler, Ernest Alfred. "The geology of the archaean granitoid-greenstone terrane in the vicinity of three Sisters, Barberton greenstone Belt." Thesis, 1994. https://hdl.handle.net/10539/24354.

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A thesis submitted to the Faculty of Science, University of the Witwatersrand, Johannesburg, for the degree of Doctor of Philosophy<br>This thesis provides a comprehensive account of the geology of the Archaean granitoid-greenstone terrane centred around Three Sisters in the northeastern sector of the Barberton Mountain Land. The supracrustal succession in the region comprises a diverse variety of altered volcanic and sedimentary rock types that have been correlated with the principal lithostratigraphic units of the Barberton greenstone belt (BGB) as fellows: 1) schistose basic and ultrabasi

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23

Kohler, Ernst Alfred. "The geology of the Archaean granitoid-greenstone terrane in the vicinity of Three Sisters, Barberton Greenstone Belt." Thesis, 1994. https://hdl.handle.net/10539/24352.

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A thesis submitted to the Faculty of Science, University of the Witwatersrand, Johannesburg, for the degree of Doctor of Philosophy<br>This thesis provides a comprehensive account of the geology of the Archaean granitoid-greenstone terrane centred around Three Sisters in the northeastern sector of the Barberton Mountain Land. The supracrustal succession in the region comprises a diverse variety of altered volcanic and sedimentary rock types that have been correlated with the principal lithostratigraphic units of the Barberton greenstone belt (BGB) as fellows: 1) schistose basic and ultraba

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24

Finn, Gregory Clement. "Geochemical and isotopic evolution of the Maggo Gneiss component from the Hopedale Block, Labrador : evidence for Late-Middle Archaean crustal reworking /." 1988. http://collections.mun.ca/u?/theses,109660.

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25

Blane, Craig Harry. "Composition and provenance of quartzites of the Mesoarchean Witwatersrand supergroup, South Africa." Thesis, 2013. http://hdl.handle.net/10210/8712.

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M.Sc.(Geology)<br>The Mesoarchean Witwatersrand Supergroup is a remarkably well preserved siliciclastic dominated cratonic platform succession located on the Kaapvaal Craton in South Africa. The vast gold resources which have been mined since 1886 make it relevant for study. The study aimed to identify significant provenance shifts throughout the depositional life of the basin which should be reflected in the in heavy mineral populations and the geochemical composition of the siliciclastic rocks. The study identified major changes in the source rock compositions through the basin lifespan and

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26

Mathe, Humphrey Lawrence Mbendeni. "Tectonostratigraphy, structure and metamorphism of the Archaean Ilangwe granite - greenstone belt south of Melmoth, Kwazulu-Natal." Thesis, 1997. http://hdl.handle.net/10413/5033.

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The mapped area, measuring about 400m2, is situated along the southern margin of the Archaean Kaapvaal Craton south of Melmoth in KwaZulu-Natal and comprises greenstones and metasediments forming a narrow, linear E-W trending and dominantly northerly inclined belt flanked to the north and south by various granitoids and granitoid gneisses which have been differentiated for the first time in this study. This belt is here referred to as the ILANGWE GREENSTONE BELT. The lIangwe Belt rocks are grouped into the Umhlathuze Subgroup (a lower metavolcanic suite) and the Nkandla Subgroup (an upper meta

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27

Cole, Edward George. "Lithostratigraphy and depositional environment of the Archaean Nsuze Group, Pongola Supergroup." Thesis, 2014. http://hdl.handle.net/10210/11447.

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28

Jenner, Frances Elaine. "Geochemistry and petrogenesis of Archean mafic and ultramafic rocks, Southern West Greenland." Phd thesis, 2006. http://hdl.handle.net/1885/151671.

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29

Kent, Adam John Reginald. "Geochronological constraints on the timing of Archaean gold mineralisation in the Yilgarn Craton, Western Australia." Phd thesis, 1994. http://hdl.handle.net/1885/140164.

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30

Hiess, Joseph. "Early crustal petrogenesis : integrated in situ U-Pb, O, Hf and Ti isotopic systematics of zircon from Archaean rocks, West Greenland." Phd thesis, 2008. http://hdl.handle.net/1885/150388.

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31

Stoltze, Amanda M. "Is proximal carbonatite magmatism the source of gold at the Wallaby Deposit, Western Australia?" Phd thesis, 2006. http://hdl.handle.net/1885/150079.

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32

Ghaderi, Majid. "Sources of Archaean gold mineralisation in the Kalgoorlie-Norseman region of western Australia, determined from strontium-neodymium istotopes and trace elements in scheelite and host rocks." Phd thesis, 1998. http://hdl.handle.net/1885/145165.

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33

Xu, Yinghuai. "The stable isotope and trace element geochemistry of the Victory gold deposit, Western Australia." Phd thesis, 1999. http://hdl.handle.net/1885/147403.

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34

Tomkins, Andrew George. "Evolution of the granulite-hosted Challenger gold deposit, South Australia : implications for ore genesis." Phd thesis, 2002. http://hdl.handle.net/1885/146024.

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35

Crawford, Matthew Adam. "Dynamic coupling between deformation processes, fluid-rock interaction, and gold deposition in the Argo gold deposit, St Ives, Western Australia." Phd thesis, 2011. http://hdl.handle.net/1885/150787.

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36

Johnson, Geoffrey I. (Geoffrey Ian). "The petrology, geochemistry and geochronology of the felsic alkaline suite of the eastern Yilgarn Block, Western Australia / Geoffrey I. Johnson." 1991. http://hdl.handle.net/2440/19697.

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Typescript (Photocopy)<br>Includes copies of 4 papers by the author as appendix 4 (v. 1)<br>Errata slip inserted<br>Bibliography: leaves 170-192 (v. 1)<br>2 v. : ill., maps ; 30 cm.<br>Title page, contents and abstract only. The complete thesis in print form is available from the University Library.<br>Thesis (Ph.D.)--Dept. of Geology and Geophysics, University of Adelaide, 1992

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