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Tectonic and sedimentary history of the Mid-Natal Valley (S.W. Indian Ocean)
The Natal Valley is a sediment-filled marine basin situated between the east coast of southern Africa (Natal) and the Mozambique Ridge. Geophysical and sedimentological techniques are used in a broad geological study of the mid Natal Valley. Major emphasis is directed to: (a) basin history and tecto...
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| Format: | Thesis |
| Language: | English English |
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Department of Geological Sciences
2017
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| _version_ | 1867613268484292608 |
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| access_status_str | Open Access |
| author | Goodlad, Stephen W Goodlad, Stephen W |
| author2 | Dingle, Richard |
| author_browse | Dingle, Richard Goodlad, Stephen W |
| author_facet | Dingle, Richard Goodlad, Stephen W Goodlad, Stephen W |
| author_sort | Goodlad, Stephen W |
| collection | Thesis |
| description | The Natal Valley is a sediment-filled marine basin situated between the east coast of southern Africa (Natal) and the Mozambique Ridge. Geophysical and sedimentological techniques are used in a broad geological study of the mid Natal Valley. Major emphasis is directed to: (a) basin history and tectonic evolution; (b) seismic stratigraphy of the basin fill; (c) recent sedimentary processes and responses. General basin morphology is defined by five major physiographic provinces: continental shelf and slope, Tugela Cone, Central Terrace, Mozambique Ridge and deep basin plain. Thinned (20-25 km) continental crust, attenuated and subsided in response to Gondwana rifting and drifting, underlies the Central Terrace, Tugela Cone and Mozambique Ridge. Southern margins of the Central Terrace and Tugela Cone are cored by a series of subsea floor ridge and pinnacle complexes (Naude, East Tugela and South Tugela Ridges). Geochemical analyses of East Tugela Ridge basalts suggest a transitional origin but with continental affinities. These volcanic marginal ridges may approximately delineate the continental-oceanic crust boundary (COB) in the Natal Valley. To the south, the deep basin plain is underlain by oceanic crust. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/23640 |
| institution | University of Cape Town (South Africa) |
| language | eng eng |
| last_indexed | 2026-06-10T12:33:26.520Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2017 |
| publishDateRange | 2017 |
| publishDateSort | 2017 |
| 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:11427/23640 Tectonic and sedimentary history of the Mid-Natal Valley (S.W. Indian Ocean) Tectonic and sedimentary history of the Mid-Natal Valley (S.W. Indian Ocean) Goodlad, Stephen W Goodlad, Stephen W Dingle, Richard Dingle, Richard Oceanography Oceanography The Natal Valley is a sediment-filled marine basin situated between the east coast of southern Africa (Natal) and the Mozambique Ridge. Geophysical and sedimentological techniques are used in a broad geological study of the mid Natal Valley. Major emphasis is directed to: (a) basin history and tectonic evolution; (b) seismic stratigraphy of the basin fill; (c) recent sedimentary processes and responses. General basin morphology is defined by five major physiographic provinces: continental shelf and slope, Tugela Cone, Central Terrace, Mozambique Ridge and deep basin plain. Thinned (20-25 km) continental crust, attenuated and subsided in response to Gondwana rifting and drifting, underlies the Central Terrace, Tugela Cone and Mozambique Ridge. Southern margins of the Central Terrace and Tugela Cone are cored by a series of subsea floor ridge and pinnacle complexes (Naude, East Tugela and South Tugela Ridges). Geochemical analyses of East Tugela Ridge basalts suggest a transitional origin but with continental affinities. These volcanic marginal ridges may approximately delineate the continental-oceanic crust boundary (COB) in the Natal Valley. To the south, the deep basin plain is underlain by oceanic crust. The Natal Valley is a sediment-filled marine basin situated between the east coast of southern Africa (Natal) and the Mozambique Ridge. Geophysical and sedimentological techniques are used in a broad geological study of the mid Natal Valley. Major emphasis is directed to: (a) basin history and tectonic evolution; (b) seismic stratigraphy of the basin fill; (c) recent sedimentary processes and responses. General basin morphology is defined by five major physiographic provinces: continental shelf and slope, Tugela Cone, Central Terrace, Mozambique Ridge and deep basin plain. Thinned (20-25 km) continental crust, attenuated and subsided in response to Gondwana rifting and drifting, underlies the Central Terrace, Tugela Cone and Mozambique Ridge. Southern margins of the Central Terrace and Tugela Cone are cored by a series of subsea floor ridge and pinnacle complexes (Naude, East Tugela and South Tugela Ridges). Geochemical analyses of East Tugela Ridge basalts suggest a transitional origin but with continental affinities. These volcanic marginal ridges may approximately delineate the continental-oceanic crust boundary (COB) in the Natal Valley. To the south, the deep basin plain is underlain by oceanic crust. 2017-01-27T12:46:27Z 2017-01-27T12:46:27Z 1986 2016-11-23T13:21:21Z Doctoral Thesis Doctoral PhD http://hdl.handle.net/11427/23640 eng eng application/pdf Department of Geological Sciences Faculty of Science University of Cape Town |
| spellingShingle | Oceanography Oceanography Goodlad, Stephen W Goodlad, Stephen W Tectonic and sedimentary history of the Mid-Natal Valley (S.W. Indian Ocean) |
| thesis_degree_str | Doctoral |
| title | Tectonic and sedimentary history of the Mid-Natal Valley (S.W. Indian Ocean) |
| title_full | Tectonic and sedimentary history of the Mid-Natal Valley (S.W. Indian Ocean) |
| title_fullStr | Tectonic and sedimentary history of the Mid-Natal Valley (S.W. Indian Ocean) |
| title_full_unstemmed | Tectonic and sedimentary history of the Mid-Natal Valley (S.W. Indian Ocean) |
| title_short | Tectonic and sedimentary history of the Mid-Natal Valley (S.W. Indian Ocean) |
| title_sort | tectonic and sedimentary history of the mid natal valley s w indian ocean |
| topic | Oceanography Oceanography |
| url | http://hdl.handle.net/11427/23640 |
| work_keys_str_mv | AT goodladstephenw tectonicandsedimentaryhistoryofthemidnatalvalleyswindianocean AT goodladstephenw tectonicandsedimentaryhistoryofthemidnatalvalleyswindianocean |