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GEOREF RECORD

Coexisting coffinite and uraninite in some sandstone-host uranium ores of Wyoming

K. R. Ludwig and R. I. Grauch
Coexisting coffinite and uraninite in some sandstone-host uranium ores of Wyoming
Economic Geology and the Bulletin of the Society of Economic Geologists (April 1980) 75 (2): 296-302

Abstract

Coexisting coffinite and uraninite appear to be very common in high-grade, sandstone-host uranium ores of Wyoming. The two minerals commonly occur as intimate intergrowths, with no marked time break between their formation. Uraniferous material with variable reflectance, intermediate between that of pure coffinite and uraninite, is commonly present and probably consists of submicroscopic mixtures of uraninite and coffinite or is the result of variations in the chemical composition of one or both of these minerals. Semiquantitative microprobe analyses always show the presence of major Ca and Si in both the uraninite and coffinite but no other major metals besides U. The Ca is not strongly fractionated between the two minerals, and the Si is possibly in the structure of uraninite as well as that of coffinite.


ISSN: 0361-0128
EISSN: 1554-0774
Coden: ECGLAL
Serial Title: Economic Geology and the Bulletin of the Society of Economic Geologists
Serial Volume: 75
Serial Issue: 2
Title: Coexisting coffinite and uraninite in some sandstone-host uranium ores of Wyoming
Affiliation: U. S. Geol. Surv., Denver, Colo., United States
Pages: 296-302
Published: 198004
Text Language: English
Publisher: Economic Geology Publishing Company, Lancaster, PA, United States
References: 16
Accession Number: 1980-033809
Categories: Economic geology of ore deposits
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. tables
N41°00'00" - N45°00'00", W111°04'60" - W104°04'60"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Society of Economic Geologists
Update Code: 1980
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