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GEOREF RECORD

Thermal history of a Bishop Tuff section as determined from the width of cryptoperthite lamellae

Eleanour Snow and Richard A. Yund
Thermal history of a Bishop Tuff section as determined from the width of cryptoperthite lamellae
Geology (Boulder) (January 1985) 13 (1): 50-53

Abstract

The lamellar spacings in the sanidine cryptoperthites (bulk composition Or (sub 66.4) Ab (sub 32.3) An (sub 1.3) ) from the Bishop Tuff near Long Valley, California, have been determined using TEM. The lamellar spacings show a sharp maximum at approx 43 m below the topographically highest sample and a weak minimum approx 4 m above this. This pattern indicates that two flows comprise the section. The gradational boundary between the flows is approx 37 m below the highest sample. Heat-flow calculations applied to the pattern of lamellar spacings indicate that these flows were emplaced within 1- 5 yr of each other. The result illustrates the power of this technique in deciphering the geological history of igneous rocks. (Authors' abstract)


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 13
Serial Issue: 1
Title: Thermal history of a Bishop Tuff section as determined from the width of cryptoperthite lamellae
Affiliation: Brown Univ., Dep. Geol. Sci., Province, RI, United States
Pages: 50-53
Published: 198501
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 17
Accession Number: 1985-038427
Categories: Igneous and metamorphic petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
N37°30'00" - N38°40'00", W119°30'00" - W117°49'60"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
Update Code: 1985
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