A comparative petrological study of some sedimentary rocks from South Africa and the surrounding continents and the significance of their heavy mineral contents
The heavy residues, the light constituents and grain size of 150 samples of Devonian to Jurassic sandstones, conglomerates, tillites and siltstones were studied. Most of the samples were collected in South Africa but a number were obtained from Australia, Tasmania, Brazil, Antarctica and the Falklan...
Main Author: | |
---|---|
Other Authors: | |
Format: | Doctoral or Postdoctoral Thesis |
Language: | English |
Published: |
University of the Free State
1960
|
Subjects: | |
Online Access: | http://hdl.handle.net/11660/10566 |
id |
ftunivfreestate:oai:scholar.ufs.ac.za:11660/10566 |
---|---|
record_format |
openpolar |
spelling |
ftunivfreestate:oai:scholar.ufs.ac.za:11660/10566 2023-05-15T13:53:42+02:00 A comparative petrological study of some sedimentary rocks from South Africa and the surrounding continents and the significance of their heavy mineral contents Wardhaugh, Theo Grote De Villiers, J. E. 1960 application/pdf http://hdl.handle.net/11660/10566 en eng University of the Free State http://hdl.handle.net/11660/10566 University of the Free State Dissertation (M.Sc. (Geology))--University of the Free State 1960 Heavy minerals contents Heavy minerals - Devonian Jurassic sandstones Conglomerates Tillites Siltstones Dissertation 1960 ftunivfreestate 2022-07-09T06:05:29Z The heavy residues, the light constituents and grain size of 150 samples of Devonian to Jurassic sandstones, conglomerates, tillites and siltstones were studied. Most of the samples were collected in South Africa but a number were obtained from Australia, Tasmania, Brazil, Antarctica and the Falkland Islands. The South African Cape System (Devonian to Carboniferous) residues were found to be quite different from those of the Karroo System, but the residues of the two groups are remarkably uniform in composition. The Cape System is characterised by an essentially simple assemblage of heavy minerals, the Table Mountain and Witteberg Series usually containing small percentages of red zircon. The Karroo System, on the other hand, is characterised by the presence of garnet, a rare mineral in other South African sedimentary rocks. The concentrates of these two systems resemble the concentrates of the equivalent Brazilian, Antarctica and Falkland Island rocks. Especially close is the resemblance between the South African and the Falkland Island samples, indicating similar source rocks, tectonism and conditions of sedimentation. Whether the two regions once formed part of the same sedimentation basin cannot be deduced from the evidence available at present. The technique used is fully described and discussed. Council for Scientific and Industrial Research Doctoral or Postdoctoral Thesis Antarc* Antarctica KovsieScholar Repository (University of the Free State - UFS UV) Table Mountain ENVELOPE(69.031,69.031,-48.668,-48.668) |
institution |
Open Polar |
collection |
KovsieScholar Repository (University of the Free State - UFS UV) |
op_collection_id |
ftunivfreestate |
language |
English |
topic |
Dissertation (M.Sc. (Geology))--University of the Free State 1960 Heavy minerals contents Heavy minerals - Devonian Jurassic sandstones Conglomerates Tillites Siltstones |
spellingShingle |
Dissertation (M.Sc. (Geology))--University of the Free State 1960 Heavy minerals contents Heavy minerals - Devonian Jurassic sandstones Conglomerates Tillites Siltstones Wardhaugh, Theo Grote A comparative petrological study of some sedimentary rocks from South Africa and the surrounding continents and the significance of their heavy mineral contents |
topic_facet |
Dissertation (M.Sc. (Geology))--University of the Free State 1960 Heavy minerals contents Heavy minerals - Devonian Jurassic sandstones Conglomerates Tillites Siltstones |
description |
The heavy residues, the light constituents and grain size of 150 samples of Devonian to Jurassic sandstones, conglomerates, tillites and siltstones were studied. Most of the samples were collected in South Africa but a number were obtained from Australia, Tasmania, Brazil, Antarctica and the Falkland Islands. The South African Cape System (Devonian to Carboniferous) residues were found to be quite different from those of the Karroo System, but the residues of the two groups are remarkably uniform in composition. The Cape System is characterised by an essentially simple assemblage of heavy minerals, the Table Mountain and Witteberg Series usually containing small percentages of red zircon. The Karroo System, on the other hand, is characterised by the presence of garnet, a rare mineral in other South African sedimentary rocks. The concentrates of these two systems resemble the concentrates of the equivalent Brazilian, Antarctica and Falkland Island rocks. Especially close is the resemblance between the South African and the Falkland Island samples, indicating similar source rocks, tectonism and conditions of sedimentation. Whether the two regions once formed part of the same sedimentation basin cannot be deduced from the evidence available at present. The technique used is fully described and discussed. Council for Scientific and Industrial Research |
author2 |
De Villiers, J. E. |
format |
Doctoral or Postdoctoral Thesis |
author |
Wardhaugh, Theo Grote |
author_facet |
Wardhaugh, Theo Grote |
author_sort |
Wardhaugh, Theo Grote |
title |
A comparative petrological study of some sedimentary rocks from South Africa and the surrounding continents and the significance of their heavy mineral contents |
title_short |
A comparative petrological study of some sedimentary rocks from South Africa and the surrounding continents and the significance of their heavy mineral contents |
title_full |
A comparative petrological study of some sedimentary rocks from South Africa and the surrounding continents and the significance of their heavy mineral contents |
title_fullStr |
A comparative petrological study of some sedimentary rocks from South Africa and the surrounding continents and the significance of their heavy mineral contents |
title_full_unstemmed |
A comparative petrological study of some sedimentary rocks from South Africa and the surrounding continents and the significance of their heavy mineral contents |
title_sort |
comparative petrological study of some sedimentary rocks from south africa and the surrounding continents and the significance of their heavy mineral contents |
publisher |
University of the Free State |
publishDate |
1960 |
url |
http://hdl.handle.net/11660/10566 |
long_lat |
ENVELOPE(69.031,69.031,-48.668,-48.668) |
geographic |
Table Mountain |
geographic_facet |
Table Mountain |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
http://hdl.handle.net/11660/10566 |
op_rights |
University of the Free State |
_version_ |
1766259084479168512 |