dc.contributor.advisor |
Beukes GJ |
en_US |
dc.contributor.author |
Cilliers Ben |
en_US |
dc.date.accessioned |
2013-07-02T14:09:54Z |
|
dc.date.available |
2013-07-02T14:09:54Z |
|
dc.date.issued |
1989 |
en_US |
dc.identifier.uri |
http://hdl.handle.net/11070.1/4026
|
|
dc.description.abstract |
Abstract provided by author: |
en_US |
dc.description.abstract |
Two metamorphic events (mostly isochemical), a regional progressive event and a later retrogressive event, weredistinguished. Only slight titanium enrichment is suspected during metamorphosis, with metasomatic alteration in the shearzones |
en_US |
dc.description.abstract |
The deformation history of the area under investigation seems to be as follows: D1 - F1-folding; D2 - F2-folding; D3 - Groothoek thrust; D4 - F3-folding; D5 - Tantalite Valley megashear zone caused rotation in the northern part of the study area in an easterly direction (clockwise); D6 - North-south shears (cut through the foliation as rotated by the Tantalite Valley megashear zone); D7 - West-northwest shears (cut through the north-south shears); D8 - Northeast-southwest shears (Jakkalswater shear seems to be the youngest structure) |
en_US |
dc.description.abstract |
The metavolcanites of the Haib Subgroup - Orange River Group are calc-alcaline rocks which are associated with a volcanic arc. These metavolcanites were intruded by the granitoids of the Vioolsdrif Suite during subduction from the south. The Houms-Revier Suite however, is a younger granite which originated as a within plate granite |
en_US |
dc.description.abstract |
Two metamorphic events (mostly isochemical), a regional progressive event and a later retrogressive event, were distinguished. Only slight titanium enrichment is suspected during metamorphosis, with metasomatic alteration in the shear zones |
en_US |
dc.format.extent |
227p |
en_US |
dc.format.extent |
2 maps in pocket |
en_US |
dc.language.iso |
afr |
en_US |
dc.subject |
Petrography |
en_US |
dc.subject |
Regional geology |
en_US |
dc.subject |
Orange river |
en_US |
dc.subject |
Namqualand metamorph complex |
en_US |
dc.title |
'n Petrogenetiese studie van 'n gedeelte van die Namaqualandse Metamorfe Kompleks langs die Oranjerivier tussen Ramansdrif en Homrivier, Warmbaddistrik, suidelike Suidwes-Afrika/Namibië |
en_US |
dc.type |
thesis |
en_US |
dc.identifier.isis |
F099-199502130000236 |
en_US |
dc.description.degree |
Bloemfontein |
en_US |
dc.description.degree |
South Africa |
en_US |
dc.description.degree |
University of the Orange Free State |
en_US |
dc.description.degree |
M Sc |
en_US |
dc.masterFileNumber |
236 |
en_US |