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The tectonic development of the Namaqua mobile belt and its foreland in parts of the Northern Cape
The Namaqua Mobile Belt extends from the south-western coast of Southern Africa through northern Namaqualand and adjacent parts of South West Africa to the south-western margin of the Kaapvaal Craton near Prieska. Its Precambrian tectonic development is characterised by several successive periods of...
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| Format: | Thesis |
| Language: | English |
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Department of Geological Sciences
2016
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| _version_ | 1867613187582459904 |
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| access_status_str | Open Access |
| author | Vajner, Václav |
| author2 | De Villiers, John |
| author_browse | De Villiers, John Vajner, Václav |
| author_facet | De Villiers, John Vajner, Václav |
| author_sort | Vajner, Václav |
| collection | Thesis |
| description | The Namaqua Mobile Belt extends from the south-western coast of Southern Africa through northern Namaqualand and adjacent parts of South West Africa to the south-western margin of the Kaapvaal Craton near Prieska. Its Precambrian tectonic development is characterised by several successive periods of deformation and metamorphism, the last of which - the Namaqua tectogenesis - occurred between c. 0,9 and 1,25 Ga B.P. The northern boundary of the mobile belt is the Namaqua front which, at different places along its length, appears as a metamorphic transition, as an oblique-slip fault, and as an interface between areas yielding radiometric ages of 2,5 - 2,9 Ga and 0,9- 1,25 Ga respectively. The foreland of the belt in the area under consideration is formed by the south-western marginal part of the Kaapvaal Craton and by the Kheis tectonic domain; the former comprises granitoids and metamorphites generally older than c.2,5 Ga (the Skalkseput Granite, the Draghoender Granite and the Swartkop sequence), as well as supracrustal cover-rocks ranging in age between c. 2,5 and 1,8 Ga (the Seekoebaard Formation, the Transvaal Supergroup and the Matsap Formation). The area of the latter is underlain by a sequence of metasediments and metavolcanics (the Kheis Group), which has been deformed and metamorphosed prior to the deposition of the Seekoebaard Formation (probably prior to the intrusion of the Draghoender Granite c. 2,9 Ga B.P.). |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/17875 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:32:09.918Z |
| 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:11427/17875 The tectonic development of the Namaqua mobile belt and its foreland in parts of the Northern Cape Vajner, Václav De Villiers, John Geology The Namaqua Mobile Belt extends from the south-western coast of Southern Africa through northern Namaqualand and adjacent parts of South West Africa to the south-western margin of the Kaapvaal Craton near Prieska. Its Precambrian tectonic development is characterised by several successive periods of deformation and metamorphism, the last of which - the Namaqua tectogenesis - occurred between c. 0,9 and 1,25 Ga B.P. The northern boundary of the mobile belt is the Namaqua front which, at different places along its length, appears as a metamorphic transition, as an oblique-slip fault, and as an interface between areas yielding radiometric ages of 2,5 - 2,9 Ga and 0,9- 1,25 Ga respectively. The foreland of the belt in the area under consideration is formed by the south-western marginal part of the Kaapvaal Craton and by the Kheis tectonic domain; the former comprises granitoids and metamorphites generally older than c.2,5 Ga (the Skalkseput Granite, the Draghoender Granite and the Swartkop sequence), as well as supracrustal cover-rocks ranging in age between c. 2,5 and 1,8 Ga (the Seekoebaard Formation, the Transvaal Supergroup and the Matsap Formation). The area of the latter is underlain by a sequence of metasediments and metavolcanics (the Kheis Group), which has been deformed and metamorphosed prior to the deposition of the Seekoebaard Formation (probably prior to the intrusion of the Draghoender Granite c. 2,9 Ga B.P.). 2016-03-17T07:11:25Z 2016-03-17T07:11:25Z 1974 Doctoral Thesis Doctoral PhD http://hdl.handle.net/11427/17875 eng application/pdf Department of Geological Sciences Faculty of Science University of Cape Town |
| spellingShingle | Geology Vajner, Václav The tectonic development of the Namaqua mobile belt and its foreland in parts of the Northern Cape |
| thesis_degree_str | Doctoral |
| title | The tectonic development of the Namaqua mobile belt and its foreland in parts of the Northern Cape |
| title_full | The tectonic development of the Namaqua mobile belt and its foreland in parts of the Northern Cape |
| title_fullStr | The tectonic development of the Namaqua mobile belt and its foreland in parts of the Northern Cape |
| title_full_unstemmed | The tectonic development of the Namaqua mobile belt and its foreland in parts of the Northern Cape |
| title_short | The tectonic development of the Namaqua mobile belt and its foreland in parts of the Northern Cape |
| title_sort | tectonic development of the namaqua mobile belt and its foreland in parts of the northern cape |
| topic | Geology |
| url | http://hdl.handle.net/11427/17875 |
| work_keys_str_mv | AT vajnervaclav thetectonicdevelopmentofthenamaquamobilebeltanditsforelandinpartsofthenortherncape AT vajnervaclav tectonicdevelopmentofthenamaquamobilebeltanditsforelandinpartsofthenortherncape |