A structural and geochemical traverse across the NW outcrop of the Colenso Fault Zone, Saldanha, South Africa

 

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dc.contributor.advisor Fagereng, Ake en_ZA
dc.contributor.advisor Harris, Chris en_ZA
dc.contributor.author Hamel, Kaylan en_ZA
dc.date.accessioned 2016-07-25T07:10:33Z
dc.date.available 2016-07-25T07:10:33Z
dc.date.issued 2016 en_ZA
dc.identifier.citation Hamel, K. 2016. A structural and geochemical traverse across the NW outcrop of the Colenso Fault Zone, Saldanha, South Africa. University of Cape Town. en_ZA
dc.identifier.uri http://hdl.handle.net/11427/20644
dc.description.abstract The Colenso Fault Zone marks the boundary between the Tygerberg and Swartland Terranes in the Pan-African Saldania Orogenic Belt. The fault zone comprises several discrete shear discontinuities that in places cross-cut relatively undeformed granites of the Cape Granite Suite. It is NW-SE striking, ~150 km long, and ~7km wide, but poorly exposed except in coastal exposures at the NW end. The deformation sequence can be divided into 2 sequences: The oldest deformation started with the emplacement of the G1, G2 and then the G3 of the Cape Granite Suite, followed by formation of aplite veins and strike-slip faulting generating cataclasites. The initial strike-slip sense of movement along the fault was sinistral, followed by dextral strike-slip shearing and finally late stage jointing. The Colenso Fault Zone is host to 3 large zones of cataclasis that are in the order of up to a few hundred metres in exposed down-dip and along-strike lengths. The cataclasites are composed of quartz and plagioclase clasts, in a phyllosilicate matrix. Both the wide cataclasites (several metres) and small cataclasite zones (tens of centimeters) show a decrease in shear intensity away from the core of the fault zone. The cataclasites have the same bulk chemical composition as the surrounding granite. en_ZA
dc.language.iso eng en_ZA
dc.subject.other Geological Sciences en_ZA
dc.title A structural and geochemical traverse across the NW outcrop of the Colenso Fault Zone, Saldanha, South Africa en_ZA
dc.type Master Thesis
uct.type.publication Research en_ZA
uct.type.resource Thesis en_ZA
dc.publisher.institution University of Cape Town
dc.publisher.faculty Faculty of Science en_ZA
dc.publisher.department Department of Geological Sciences en_ZA
dc.type.qualificationlevel Masters
dc.type.qualificationname MSc en_ZA
uct.type.filetype Text
uct.type.filetype Image
dc.identifier.apacitation Hamel, K. (2016). <i>A structural and geochemical traverse across the NW outcrop of the Colenso Fault Zone, Saldanha, South Africa</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Geological Sciences. Retrieved from http://hdl.handle.net/11427/20644 en_ZA
dc.identifier.chicagocitation Hamel, Kaylan. <i>"A structural and geochemical traverse across the NW outcrop of the Colenso Fault Zone, Saldanha, South Africa."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Geological Sciences, 2016. http://hdl.handle.net/11427/20644 en_ZA
dc.identifier.vancouvercitation Hamel K. A structural and geochemical traverse across the NW outcrop of the Colenso Fault Zone, Saldanha, South Africa. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Geological Sciences, 2016 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/20644 en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Hamel, Kaylan AB - The Colenso Fault Zone marks the boundary between the Tygerberg and Swartland Terranes in the Pan-African Saldania Orogenic Belt. The fault zone comprises several discrete shear discontinuities that in places cross-cut relatively undeformed granites of the Cape Granite Suite. It is NW-SE striking, ~150 km long, and ~7km wide, but poorly exposed except in coastal exposures at the NW end. The deformation sequence can be divided into 2 sequences: The oldest deformation started with the emplacement of the G1, G2 and then the G3 of the Cape Granite Suite, followed by formation of aplite veins and strike-slip faulting generating cataclasites. The initial strike-slip sense of movement along the fault was sinistral, followed by dextral strike-slip shearing and finally late stage jointing. The Colenso Fault Zone is host to 3 large zones of cataclasis that are in the order of up to a few hundred metres in exposed down-dip and along-strike lengths. The cataclasites are composed of quartz and plagioclase clasts, in a phyllosilicate matrix. Both the wide cataclasites (several metres) and small cataclasite zones (tens of centimeters) show a decrease in shear intensity away from the core of the fault zone. The cataclasites have the same bulk chemical composition as the surrounding granite. DA - 2016 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2016 T1 - A structural and geochemical traverse across the NW outcrop of the Colenso Fault Zone, Saldanha, South Africa TI - A structural and geochemical traverse across the NW outcrop of the Colenso Fault Zone, Saldanha, South Africa UR - http://hdl.handle.net/11427/20644 ER - en_ZA


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