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The occurrence of osumilite in pelitic granulites of the Namaqualand metamorphic complex, South Africa

Abstract:

The rare mineral osumilite occurs in Mg-rich metapelitic granulites near Bitterfontein in Namaqualand, South Africa. Associated metamorphic rocks contain the assemblage spinel + quartz which has been used to delineate the upper granulite facies zone of the Namaqualand Metamorphic Complex. The osumilite can be described as very Mg-rich, with most of the iron in the state of Fe3+. The presence of osumilite is largely due to a high oxidation state, high Mg/(Mg+Fe2+) ratio, and low H2O activity. ...

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Authors


Nowicki, TE More by this author
Frimmel, HE More by this author
More by this author
Institution:
University of Oxford
Department:
Oxford, MPLS, Earth Sciences
Journal:
South African Journal of Geology
Volume:
98
Issue:
2
Pages:
191-201
Publication date:
1995
ISSN:
1012-0750
URN:
uuid:026dc349-4338-4a4e-87eb-d1199e3b73dc
Source identifiers:
176237
Local pid:
pubs:176237
Language:
English

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