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Mesozoic geology of the Agulhas Bank, South Africa
Includes bibliogaphic references.
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| Main Author: | |
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| Format: | Thesis |
| Language: | English |
| Published: |
Department of Geological Sciences
2016
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| _version_ | 1867613501850124288 |
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| access_status_str | Open Access |
| author | Du Toit, Schalk Roelof |
| author_browse | Du Toit, Schalk Roelof |
| author_facet | Du Toit, Schalk Roelof |
| author_sort | Du Toit, Schalk Roelof |
| collection | Thesis |
| description | Includes bibliogaphic references. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/19680 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:37:09.688Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2016 |
| publishDateRange | 2016 |
| publishDateSort | 2016 |
| publisher | Department of Geological Sciences |
| publisherStr | Department of Geological Sciences |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/19680 Mesozoic geology of the Agulhas Bank, South Africa Du Toit, Schalk Roelof Geological Sciences Includes bibliogaphic references. This thesis is concerned with the Mesozoic geological history of the Agulhas Bank on the continental shelf off the south coast of South Africa. It incorporates the results of oil exploration activities in the area since 1967: this involved the drilling of 17 boreholes (43 000 m) and the recording of about 24 000 line km of seismic reflection profiles. A structural investigation was facilitated by regional mapping of two key seismic reflectors; these are acoustic basement (horizon D at tile base of the Mesozoic) and a prominent reflector and unconformable horizon (horizon C) within the Lower Cretaceous. An additional two horizons were mapped over part of the Agulhas Bank; they are horizons A (base of the Uppper Cretaceous) and 11 (within the Lower Cretaceous). These reflector horizons were tied to stratigraphic control points in the boreholes. A stratigraphic framework was erected and correlations were established by means of a study of borehole cuttings samples, cores and sidewall cores and a variety of wireline logs. The existing Mesozoic litho-stratrigraphic framework was supplemented by defining reference stratotypes for the Swart¬kops end Sundays River formations. Subsurface stratotypes are defined for two new units; they are termed the Infanta and Alphard Formations. A subsurface reference stratotype for the Alexandria Formation is presented. A chronostratigrapic framework and correlations, which became available through a study of microfauna and microflora were intergrated with structural and lithostratigraphic information. As a consequence four litho-tectonic units are recognised; their evolution is discussed also in terms of varying rates of sediment accumulation. The Mesozoic geologic history of the Agulhas bank is discussed in reference to the plate tectonic history. 2016-05-16T11:55:04Z 2016-05-16T11:55:04Z 1975 Doctoral Thesis Doctoral PhD http://hdl.handle.net/11427/19680 eng application/pdf Department of Geological Sciences Faculty of Science University of Cape Town |
| spellingShingle | Geological Sciences Du Toit, Schalk Roelof Mesozoic geology of the Agulhas Bank, South Africa |
| thesis_degree_str | Doctoral |
| title | Mesozoic geology of the Agulhas Bank, South Africa |
| title_full | Mesozoic geology of the Agulhas Bank, South Africa |
| title_fullStr | Mesozoic geology of the Agulhas Bank, South Africa |
| title_full_unstemmed | Mesozoic geology of the Agulhas Bank, South Africa |
| title_short | Mesozoic geology of the Agulhas Bank, South Africa |
| title_sort | mesozoic geology of the agulhas bank south africa |
| topic | Geological Sciences |
| url | http://hdl.handle.net/11427/19680 |
| work_keys_str_mv | AT dutoitschalkroelof mesozoicgeologyoftheagulhasbanksouthafrica |