Origin of biotite-apatite-rich enclaves, Achala batholith, Argentina

The Achala batholith of Argentina contains very unusual layered enclaves containing up to 30% apatite and 50% biotite in some layers. This modal mineralogy produces bulk-rock compositions that cannot represent liquids, havingas little as 29% Si02 and up to 8% P205.

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Bibliographic Details
Published in:Contributions to mineralogy and petrology 1997-12, Vol.130 (1), p.31-46
Main Authors: Dorais, Michael J., Lira, Raul, Chen, Yadong, Tingey, David
Format: Article
Language:English
Subjects:
Geology
Mineralogy
Minerals
Petrology
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Online Access:Get full text
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Description
Summary:The Achala batholith of Argentina contains very unusual layered enclaves containing up to 30% apatite and 50% biotite in some layers. This modal mineralogy produces bulk-rock compositions that cannot represent liquids, havingas little as 29% Si02 and up to 8% P205.
ISSN:0010-7999
1432-0967
DOI:10.1007/s004100050347