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GEOREF RECORD

Mineralogical relations in some pelitic hornfelses from the southern Sierra Nevada, California

M. G. Best and L. E. Weiss
Mineralogical relations in some pelitic hornfelses from the southern Sierra Nevada, California
American Mineralogist (1964) 49: 1240-1266

Abstract

Pelitic hornfels in a metamorphic septum east of Isabella, Calif., range in composition from andalusite + biotite + quartz + muscovite to sillimanite + cordierite + perthite + biotite + quartz + or - almandine. Chemical analyses of some constituent minerals suggest that, with increasing temperature, the stability field of biotite + andalusite diminishes and biotite and cordierite become richer in Fe (super 2+) relative to Mg. Fe appears to have been reduced during prograde thermal metamorphism, suggesting that the body was open to oxygen. Partial or complete chemical analyses of six biotites, three cordierites, and two garnets are given.


ISSN: 0003-004X
EISSN: 1945-3027
Coden: AMMIAY
Serial Title: American Mineralogist
Serial Volume: 49
Title: Mineralogical relations in some pelitic hornfelses from the southern Sierra Nevada, California
Pages: 1240-1266
Published: 1964
Text Language: English
Publisher: Mineralogical Society of America, Washington, DC, United States
Accession Number: 1964-006107
Categories: Igneous and metamorphic petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus., tables
N32°30'00" - N42°00'00", W124°30'00" - W114°15'00"
Source Note: nos. 9-10
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Bibliography and Index of North American Geology, U. S. Geological Survey, Reston, VA, United States
Update Code: 1964
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