Dissertations / Theses on the topic 'Late Precambrian'
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Consult the top 22 dissertations / theses for your research on the topic 'Late Precambrian.'
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Cardenas, S. Fidel A. "The geochemistry of a late Precambrian weathering profile, northwest Scotland." Thesis, University of Strathclyde, 1986. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=21485.
Full textSun, Weiguo. "Contributions to palaeontology and stratigraphic correlation of the late precambrian in China and Australia /." Title page, contents and summary only, 1985. http://web4.library.adelaide.edu.au/theses/09PH/09phs957.pdf.
Full textAl, Rajaibi Ibrahim Mohamed amur. "Origin and variability of the late Precambrian-Cambrian Athel Silicilyte, South Oman Salt Basin." Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/origin-and-variability-of-the-late-precambriancambrian-athel-silicilyte-south-oman-salt-basin(4117c367-a1fa-4937-877e-d1391f95c406).html.
Full textHorak, Jana M. "The late Precambrian Coedana and Sarn complexes, Northwest Wales : a geochemical and petrochemical study." Thesis, Cardiff University, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.580636.
Full textWang, Ping. "Geology and Tectonic Significance of the Late Precambrian Eastern Blue Ridge Cover Sequence in Central Virginia." Diss., This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-06062008-142355/.
Full textTribe, Ian Roger. "Deformation of granitoid rocks, Channel Islands, UK : Implications for the structural evolution of a late Precambrian arc." Thesis, Oxford Brookes University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.262069.
Full textHerrington, Paul M. "Stratography, sedimentology and diagenesis of late Precambrian carbonates from the Upper Limestone-Dolomite 'series', central east Greenland." Thesis, University of Birmingham, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.694379.
Full textKillick, M. F. "Sedimentological and geochemical studies on late Precambrian sequences of the Eastern block of the Massif Ancien, High Atlas, Morocco." Thesis, University of Reading, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.383479.
Full textRestrepo, Pedro Alonso. "Late Precambrian to Early Mesozoic tectonic evolution of the Colombian Andes, based on new geochronological geochemical and isotopic data." Diss., The University of Arizona, 1995. http://hdl.handle.net/10150/187450.
Full textLarkin, Emma A. "FIELD, GEOCHRONOLOGIC, AND GEOCHEMICAL CONSTRAINTS ON LATE PRECAMBRIAN TO EARLY PALEOZOIC TERRANE ACCRETION IN THE SOUTHERN APPALACHIAN BLUE RIDGE PROVINCE." UKnowledge, 2016. http://uknowledge.uky.edu/ees_etds/39.
Full textSingh, Updesh. "Late Precambrian and Cambrian carbonates of the Adelaidean in the Flinders Ranges, South Australia : a petrographic, electron microprobe and stable isotope study /." Title page, abstract and contents only, 1986. http://web4.library.adelaide.edu.au/theses/09PH/09phs1792.pdf.
Full textTemperley, Stephen. "The late Proterozoic to early Palaeozoic geological development of the Glen Banchor area in the Monadhliath Mountains of Scotland : with particular reference to deformation in late-Precambrian shear zones and in the Central Highland steep belt." Thesis, University of Hull, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.293171.
Full textHaines, Peter W. "Carbonate shelf and basin sedimentation, late Proterozoic Wonoka Formation, South Australia /." Title page, contents and summary only, 1987. http://web4.library.adelaide.edu.au/theses/09PH/09phh152.pdf.
Full textWalsh, Kevin B. Jr. "GEOCHRONOLOGICAL AND GEOCHEMICAL CONSTRAINTS ON THE ORIGIN OF THE CARTOOGECHAYE TERRANE, WESTERN NORTH CAROLINA: IMPLICATIONS FOR THE LATE PRECAMBRIAN TO EARLY PALEOZOIC EVOLUTION OF THE EASTERN LAURENTIAN MARGIN." UKnowledge, 2018. https://uknowledge.uky.edu/ees_etds/57.
Full textSimmons-Ferguson, Heather Elizabeth. "Total and organic mercury in periphyton from a Precambrian shield lake." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/mq21700.pdf.
Full textDavis, Chris. "Habitat, distribution and abundance of juvenile lake trout, sculpin and burbot in four small, precambrian shield lakes in Ontario." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ27344.pdf.
Full textAllan, Craig James. "Lake ice cover development and meltwater mixing in the spring acidification of small Canadian Precambrian Shield lakes." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1987. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq21669.pdf.
Full textHalter, Ghislaine. "Zonalite des alterations dans l'environnement des gisements d'uranium associes a la discordance du proterozoique moyen (saskatchewan, canada)." Université Louis Pasteur (Strasbourg) (1971-2008), 1988. http://www.theses.fr/1988STR13078.
Full textSun, Weiguo. "Contributions to palaeontology and stratigraphic correlation of the late precambrian in China and Australia / by Sun Weiguo (W.G. Sun)." Thesis, 1985. http://hdl.handle.net/2440/20400.
Full textMyrow, Paul Michael. "Sedimentology and depositional history of the Chapel Island Formation (late Precambrian to early Cambrian) southeast Newfoundland /." 1987. http://collections.mun.ca/u?/theses,97100.
Full textHaines, Peter W. "Carbonate shelf and basin sedimentation, late Proterozoic Wonoka Formation, South Australia." Thesis, 1987. http://hdl.handle.net/2440/21574.
Full textThesis (Ph.D.) -- University of Adelaide, Dept. of Geology and Geophysics, 1987
Theron, Salomon Johannes. "The North Break Zone of the late Precambrian Otavi carbonate platform sequence in Namibia: stratigraphic setting, petrography and relationship with Tsumeb Cu-Pb-Zn deposit." Thesis, 2014. http://hdl.handle.net/10210/10360.
Full textThe main objective of this study was to characterize the North Break Zone of the Otavi Mountain Land, Namibia in terms of stratigraphy and petrography and to investigate its relationship with the Tsumeb ore body and other mineralized prospects in the immediate vicinity of Tsumeb. The Late Proterozoic Otavi carbonate platform sequence is famous for its base metal deposits. The North Break Zone is a stratabound zone of sporadic mineralization, brecciation and silicification occurring in the lower part of Iithozone T6 of the Hoffenberg Formation (Tsumeb Subgroup). It intersects the pipe-like Tsumeb Cu-Pb-Zn-Ag ore body at a depth of about 900m below surface. Where the North Break Zone intersects the Tsumeb ore body large massive ore associated with calcitized dolomite, dolomite breccia as well as feldspathic sandstone lenses occur. These features extend along strike and dip outside the normal dimensions of the Tsumeb ore body. The genesis of the Tsumeb ore body is poorly understood. The conventional model is that meteoric fluids circulated through the so-called North Break Zone paleo-aquifer, dissolving carbonate and giving rise to solution collapse and eventually the creation of the Tsumeb karst pipe. However, no direct evidence is available to support this model. This study was devised to critically evaluate the relationship between the North Break Zone and formation of the Tsumeb ore body. The study entailed field mapping, detailed sampling of the stratigraphic sequence and ore bodies, white light, reflected light, UV/blue light and cathodoluminescence petrography. Cathodoluminescence proved to be the most effective petrographic tool for differentiating various carbonate phases. The North Break Zone is defined as a 10 to 14m thick chert free oolitic to intraclastic dolomitic grainstone, stromatolite and mudstone unit, in which discontinuous lenses of mineralized secondary quartz are present. It is interbedded with dark grey cherty micritic dolomite of Lithozone T6 of the HOffenberg Formation. Minor calcification, Cu-Pb-Zn mineralization and manganese and iron enrichment are associated with the quartz-rich bodies. The mineralized quartz bodies are only present up to 2.5km to the west and 2.6km to the east of the Tsumeb ore body. The petrographic study indicated that 1) the epigenetic sequence of carbonate alteration, precipitation of new carbonate phases and mineralization is virtually identical in all Cu-Pb-Zn occurrences and 2) that the mineralization is closely associated with Mn-bearing brightly luminescent (CL) carbonates. Earlier Cu-Pb-Zn sulphide mineralization is associated with Mn-bearing bright red luminescent sparry dolomite (dolomite IIIB). Late stage Cu-arsenate, oxide and silicate mineralization is associated with an episode of Mn-bearing bright yellow luminescent calcite (calcite II) which also causes dolomitization of the associated dolomites. A very simple paragenetic model of mineralization is proposed. The earliest is defined by pre-mineralization calcite (calcite I) vein formation with associated dolomitization. This phase is followed by deposition of kerogen luminescent Mn-bearing dolomite IIIB - quartz and Cu-Pb-Zn sulphides representing the main mineralization event. It is followed by a late mineralization event composed of Mn-bearing calcite (calcite II) with associated Cu-arsenates, oxides and silicates. Supergene alteration is represented by the precipitation of very late stage non-luminescent Mn and Fe-poor calcite (calcite III) and quartz without any associated Cu-Pb-Zn mineralization. The sequence of mineralization is explained by the evolution of a single hydrothermal fluid, from relatively cold to hot and then back to cold, during a major period of fluid migration through the carbonate platform sequence. The North Break Zone probably never acted as a paleo-aquifer for fluids that formed the Tsumeb ore body. Rather hydrothermal fluids moved from the Tsumeb ore body into the North Break Zone. Hydrothermal fluids may have been derived from the Damara orogen to the south of Tsumeb during a period of tectonic loading and thrust deformation.