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Die ontwikkeling van 'n eksplorasiemodel vir ystererts in die penge-formasie by Thabazimbi
Dissertation (MSc)--University of Pretoria, 1985.
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| Format: | Thesis |
| Language: | Afrikaans |
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University of Pretoria
2022
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| _version_ | 1867613713348952064 |
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| access_status_str | Open Access |
| author2 | Van Deventer, Johann Louis |
| author_browse | Van Deventer, Johann Louis |
| author_facet | Van Deventer, Johann Louis |
| collection | Thesis |
| dc_rights_str_mv | © 2020 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
| description | Dissertation (MSc)--University of Pretoria, 1985. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/85453 |
| institution | University of Pretoria (South Africa) |
| language | Afrikaans |
| last_indexed | 2026-06-10T12:40:31.230Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2022 |
| publishDateRange | 2022 |
| publishDateSort | 2022 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/85453 Die ontwikkeling van 'n eksplorasiemodel vir ystererts in die penge-formasie by Thabazimbi Van Deventer, Johann Louis UCTD Ontwikkeling Eksplorasiemodel Ystererts Penge-formasie Thabazimbi Dissertation (MSc)--University of Pretoria, 1985. The Thabazimbi mining area is underlain by rocks of the Transvaal Sequence. The Frisco and Penge Formations of the Chuniespoort Group are described with the aim of identifying marker beds within the formations and to investigate the formation of the carbonate and talc-rich hematite rocks, as well as the iron ore itself. The Penge Formation is subdivided into six zones and comprises mainly thick units of ferythmite which alternate with thin units of felutite; the Frisco Formation is comprised of chert-poor dolomite. Thrust faulting of the post-Waterberg tectonic period has tripled the sequence and three prominent mountain ranges have arisen as a result of differential erosion. The tectonism has thermodynamically metamorphosed the banded ironstone and metasomatised dolomite and banded ironstone, causing the formation of carbonate and talc-rich hematite rocks at depth in zones 2 and 3 of the Penge Formation. Leaching of the uppermost portions of the Frisco Formation has led to sagging, brecciation and collapse of zones 1 to 3 of the Penge Formation. The area has thus served as an ideal zone for supergene processes and the ensueing formation of iron ore. During the post-Karroo tectonic period, normal and reversed faults preferentially developed in the weak zones associated with collapse structures. In these areas a second period of ferruginisation by supergene processes took place, during the post-Karoo erosion cycle. Martite-hematite ore, which is the last phase of ferruginisation of banded ironstones, carbonate and talc-hematite rocks, can therefore be regarded as a product of chemical sedimentation, metamorphism and supergene processes. Areas in which brecciation of zones 2 and 3 has occurred and where collapse has taken place, as well as where mudstones, and dolerite dykes have served as barriers, are ferruginised. Post-Karoo faults which have subsequently affected the brecciated zones or collapse structures, or a combination thereof, have also been ferruginised. Areas in which the abovementioned elements or a combination thereof have occurred, should be regarded as a target for future exploration. Mathematics and Applied Mathematics MSc Unrestricted 2022-05-17T11:21:26Z 2022-05-17T11:21:26Z 29/7/2021 1985 Dissertation * https://repository.up.ac.za/handle/2263/85453 af © 2020 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. application/pdf University of Pretoria |
| spellingShingle | UCTD Ontwikkeling Eksplorasiemodel Ystererts Penge-formasie Thabazimbi Die ontwikkeling van 'n eksplorasiemodel vir ystererts in die penge-formasie by Thabazimbi |
| title | Die ontwikkeling van 'n eksplorasiemodel vir ystererts in die penge-formasie by Thabazimbi |
| title_full | Die ontwikkeling van 'n eksplorasiemodel vir ystererts in die penge-formasie by Thabazimbi |
| title_fullStr | Die ontwikkeling van 'n eksplorasiemodel vir ystererts in die penge-formasie by Thabazimbi |
| title_full_unstemmed | Die ontwikkeling van 'n eksplorasiemodel vir ystererts in die penge-formasie by Thabazimbi |
| title_short | Die ontwikkeling van 'n eksplorasiemodel vir ystererts in die penge-formasie by Thabazimbi |
| title_sort | die ontwikkeling van n eksplorasiemodel vir ystererts in die penge formasie by thabazimbi |
| topic | UCTD Ontwikkeling Eksplorasiemodel Ystererts Penge-formasie Thabazimbi |
| url | https://repository.up.ac.za/handle/2263/85453 |