Aspects of volcanism and metamorphism of the Onverwacht group lavas in the South-Western portion of the Barberton greenstone belt.

Aspects of volcanism and metamorphism of the Onverwacht group lavas in the South-Western portion of the Barberton greenstone belt.

A Dissertation Submitted to the Faculty of Science; University of the Witwatersrand, Johannesburg; for the Degree of Doctor of Philosophy === A volcanological study of the Onverwacht Group in the southwestern part of the Archaean (-3.5 - 3.2 Ga) Barberton greenstone belt (BGB), South Africa, show...

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Bibliographic Details
Main Author: Cloete, Marthinus
Format: Others
Language:en
Published: 2017
Subjects:
Volcanism > South Africa > Barberton.
Metamorphism (Geology) > South Africa > Barberton.
Geology > South Africa > Barberton.
Online Access:http://hdl.handle.net/10539/22828
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spelling ndltd-netd.ac.za-oai-union.ndltd.org-wits-oai-wiredspace.wits.ac.za-10539-228282019-05-11T03:41:42Z Aspects of volcanism and metamorphism of the Onverwacht group lavas in the South-Western portion of the Barberton greenstone belt. Cloete, Marthinus Volcanism -- South Africa -- Barberton. Metamorphism (Geology) -- South Africa -- Barberton. Geology -- South Africa -- Barberton. A Dissertation Submitted to the Faculty of Science; University of the Witwatersrand, Johannesburg; for the Degree of Doctor of Philosophy A volcanological study of the Onverwacht Group in the southwestern part of the Archaean (-3.5 - 3.2 Ga) Barberton greenstone belt (BGB), South Africa, shows that volcanic extrusion rates of the Komati and Hooggenoeg Formations must have been high to have maintained the degree of submarine sheet flooding that is evident. It is concluded that the volcanic attributes of the Komati and Hooggenoeg Formations are not typical of MOR crust, as has been claimed, but rather closely resemble those of modern oceanic plateaus. The shear-zone-bound basal contact of the Komati Formation suggests that the top of the ancient oceanic plateau was allochthonously emplaced and delaminated from its basal (intrusive) part. (Abbreviation abstract) AC2017 2017-06-08T10:07:29Z 2017-06-08T10:07:29Z 1994 Thesis http://hdl.handle.net/10539/22828 en application/pdf
collection NDLTD
language en
format Others
sources NDLTD
topic Volcanism -- South Africa -- Barberton.
Metamorphism (Geology) -- South Africa -- Barberton.
Geology -- South Africa -- Barberton.
spellingShingle Volcanism -- South Africa -- Barberton.
Metamorphism (Geology) -- South Africa -- Barberton.
Geology -- South Africa -- Barberton.
Cloete, Marthinus
Aspects of volcanism and metamorphism of the Onverwacht group lavas in the South-Western portion of the Barberton greenstone belt.
description A Dissertation Submitted to the Faculty of Science; University of the Witwatersrand, Johannesburg; for the Degree of Doctor of Philosophy === A volcanological study of the Onverwacht Group in the southwestern part of the Archaean (-3.5 - 3.2 Ga) Barberton greenstone belt (BGB), South Africa, shows that volcanic extrusion rates of the Komati and Hooggenoeg Formations must have been high to have maintained the degree of submarine sheet flooding that is evident. It is concluded that the volcanic attributes of the Komati and Hooggenoeg Formations are not typical of MOR crust, as has been claimed, but rather closely resemble those of modern oceanic plateaus. The shear-zone-bound basal contact of the Komati Formation suggests that the top of the ancient oceanic plateau was allochthonously emplaced and delaminated from its basal (intrusive) part. (Abbreviation abstract) === AC2017
author Cloete, Marthinus
author_facet Cloete, Marthinus
author_sort Cloete, Marthinus
title Aspects of volcanism and metamorphism of the Onverwacht group lavas in the South-Western portion of the Barberton greenstone belt.
title_short Aspects of volcanism and metamorphism of the Onverwacht group lavas in the South-Western portion of the Barberton greenstone belt.
title_full Aspects of volcanism and metamorphism of the Onverwacht group lavas in the South-Western portion of the Barberton greenstone belt.
title_fullStr Aspects of volcanism and metamorphism of the Onverwacht group lavas in the South-Western portion of the Barberton greenstone belt.
title_full_unstemmed Aspects of volcanism and metamorphism of the Onverwacht group lavas in the South-Western portion of the Barberton greenstone belt.
title_sort aspects of volcanism and metamorphism of the onverwacht group lavas in the south-western portion of the barberton greenstone belt.
publishDate 2017
url http://hdl.handle.net/10539/22828
work_keys_str_mv AT cloetemarthinus aspectsofvolcanismandmetamorphismoftheonverwachtgrouplavasinthesouthwesternportionofthebarbertongreenstonebelt
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