Sedimentological and geochemical evidence for late quaternary environmental changes in southern Africa : a case study of the mudbelt deposits off Namaqualand

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dc.contributor.advisorMeadows, Michael Een_ZA
dc.contributor.advisorRogers , Jen_ZA
dc.contributor.authorMabote, Molefi Ellioten_ZA
dc.date.accessioned2015-09-14T18:04:39Z
dc.date.available2015-09-14T18:04:39Z
dc.date.issued1997en_ZA
dc.descriptionBibliography: leaves 105-121.en_ZA
dc.description.abstractThis thesis is comprised of sedimentological and geochemical studies of seven 7m core sediments retrieved from the Namaqualand Mudbelt, South Africa. The purpose of this research is to contribute to the evidence for environmental change during the late Quaternary in the southern Africa from the analyses of continental shelf sediments and more specifically, to examine feasibility of using Namaqualand mudbelts as a key to understanding late environmental dynamics of both terrestrial and marine environment. Namaqualand mudbelts seem to have been deposited during the last 10 000 years. Chrono- and lithostratigraphy, coarse-fraction and geochemical analyses suggest the following sedimentary development on the Namaqualand offshore. An early period of deposition dominated by marine conditions off the coast, but with significant input in the north (Orange Delta) and south (off KIeinsee). There is a fining upcore sequence from the Orange Prodelta southward to the inner shelf (off Kleinsee). This fining-upward sequence is generally indicative of shoreward transgression of the sea (rising sea-level). As sea-level rises (shoreward transgression), finer-grained deeper water deposits migrate landward and are deposited over shallower water deposits. While the Orange River might be a major source of sediments on the Orange River Delta, marine contribution is increasingly important far south of the Orange Delta (off KIeinsee). ln addition, berg winds and local ephemeral Namaqualand rivers are also increasingly important.en_ZA
dc.identifier.apacitationMabote, M. E. (1997). <i>Sedimentological and geochemical evidence for late quaternary environmental changes in southern Africa : a case study of the mudbelt deposits off Namaqualand</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Environmental and Geographical Science. Retrieved from http://hdl.handle.net/11427/13887en_ZA
dc.identifier.chicagocitationMabote, Molefi Elliot. <i>"Sedimentological and geochemical evidence for late quaternary environmental changes in southern Africa : a case study of the mudbelt deposits off Namaqualand."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Environmental and Geographical Science, 1997. http://hdl.handle.net/11427/13887en_ZA
dc.identifier.citationMabote, M. 1997. Sedimentological and geochemical evidence for late quaternary environmental changes in southern Africa : a case study of the mudbelt deposits off Namaqualand. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Mabote, Molefi Elliot AB - This thesis is comprised of sedimentological and geochemical studies of seven 7m core sediments retrieved from the Namaqualand Mudbelt, South Africa. The purpose of this research is to contribute to the evidence for environmental change during the late Quaternary in the southern Africa from the analyses of continental shelf sediments and more specifically, to examine feasibility of using Namaqualand mudbelts as a key to understanding late environmental dynamics of both terrestrial and marine environment. Namaqualand mudbelts seem to have been deposited during the last 10 000 years. Chrono- and lithostratigraphy, coarse-fraction and geochemical analyses suggest the following sedimentary development on the Namaqualand offshore. An early period of deposition dominated by marine conditions off the coast, but with significant input in the north (Orange Delta) and south (off KIeinsee). There is a fining upcore sequence from the Orange Prodelta southward to the inner shelf (off Kleinsee). This fining-upward sequence is generally indicative of shoreward transgression of the sea (rising sea-level). As sea-level rises (shoreward transgression), finer-grained deeper water deposits migrate landward and are deposited over shallower water deposits. While the Orange River might be a major source of sediments on the Orange River Delta, marine contribution is increasingly important far south of the Orange Delta (off KIeinsee). ln addition, berg winds and local ephemeral Namaqualand rivers are also increasingly important. DA - 1997 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1997 T1 - Sedimentological and geochemical evidence for late quaternary environmental changes in southern Africa : a case study of the mudbelt deposits off Namaqualand TI - Sedimentological and geochemical evidence for late quaternary environmental changes in southern Africa : a case study of the mudbelt deposits off Namaqualand UR - http://hdl.handle.net/11427/13887 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/13887
dc.identifier.vancouvercitationMabote ME. Sedimentological and geochemical evidence for late quaternary environmental changes in southern Africa : a case study of the mudbelt deposits off Namaqualand. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Environmental and Geographical Science, 1997 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/13887en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Environmental and Geographical Scienceen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherEnvironmental and Geographical Scienceen_ZA
dc.titleSedimentological and geochemical evidence for late quaternary environmental changes in southern Africa : a case study of the mudbelt deposits off Namaqualanden_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMScen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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