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GEOREF RECORD

Compositional variations of plagioclase feldspar from a basaltic lava flow

Jerry M. Hoffer
Compositional variations of plagioclase feldspar from a basaltic lava flow
American Mineralogist (1966) 51: 807-813

Abstract

A detailed study of the Rock Creek basalt flow reveals significant relationships between chemmical composition of the plagioclase feldspar and texture. The An content of the groundmass plagioclase varies inversely with size and directly with the amount of associated glass. The rate of cooling, after extrusion, determined the composition of the groundmass plagioclase. The plagioclase phenocrysts, averaging 20 percent more calcic than the corresponding groundmass plagioclase, are intrattelluric.


ISSN: 0003-004X
EISSN: 1945-3027
Coden: AMMIAY
Serial Title: American Mineralogist
Serial Volume: 51
Title: Compositional variations of plagioclase feldspar from a basaltic lava flow
Author(s): Hoffer, Jerry M.
Pages: 807-813
Published: 1966
Text Language: English
Publisher: Mineralogical Society of America, Washington, DC, United States
Accession Number: 1966-004386
Categories: Igneous and metamorphic petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus., table
N42°00'00" - N49°00'00", W117°15'00" - W111°04'60"
Source Note: nos. 5-6
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: 1966
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