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Vermiculite, hydrobiotite, and biotite in the Rainy Creek igneous complex near Libby, Montana

Published online by Cambridge University Press:  09 July 2018

A. L. Boettcher*
Affiliation:
Department of Geophysical Sciences, University of Chicago, 1101 East 58th Street, Chicago, Illinois, 60637, U.S.A.

Abstract

Vermiculite and hydrobiotite both occur as alteration products of biotite pyroxenite near Libby, Montana. Hydrothermal and weathering studies and new chemical analyses by C. O. Ingamells suggest that the vermiculite is a product of leaching of biotite by ground waters; the hydrobiotite may be a higher temperature alteration product.

Type
Research Article
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1966

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