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Local equilibrium in polymetamorphic gneiss and the titanium substitution in biotite

Abstract:

Secondary metamorphic biotite grew with sillimanite and garnet at the expense of cordierite during a Pan-African metamorphic event overprinting Grenville age granulite-facies metapelites at the western margin of the Namaqualand Metamorphic Complex, South Africa. Fe-Mg exchange thermometry and average pressure calculations constrain the conditions of the overprinting metamorphism to about 660°C at 6 kbar. Biotite compositions reflect chemical equilibrium in local domains defined by partly to c...

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Publication status:
Published

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Institution:
University of Oxford
Department:
Oxford, MPLS, Earth Sciences
Charnley, NR More by this author
Journal:
AMERICAN MINERALOGIST
Volume:
87
Issue:
4
Pages:
383-396
Publication date:
2002-04-05
ISSN:
0003-004X
URN:
uuid:e500ff53-a86c-4434-9d0b-0bdc996c51b7
Source identifiers:
82318
Local pid:
pubs:82318
Language:
English

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