Highly radioactive topaz rhyolites of the Toano Range, northeastern Nevada

Highly radioactive topaz rhyolites of Miocene age are described from a new locality in the Toano Range of NE Nevada. Quartz phenocrysts are blackened by radiation damage. High magmatic Th and U concentrations (87 and 46 ppm, respectively) allow the rhyolites to be readily distinguished on aeroradiom...

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Bibliographic Details
Published in:The American mineralogist 1992-10, Vol.77 (9-10), p.1067-1073
Main Authors: Price, Jonathan G, Castor, Stephen B, Miller, David M
Format: Article
Language:English
Subjects:
Elko County Nevada
fluorides
framework silicates
Geochemistry
halides
igneous and metamorphic rocks
igneous rocks
intrusions
Lava
Lava flows
metals
Minerals
Miocene
nesosilicates
Nevada
northeastern Nevada
orthosilicates
Petrology
phenocrysts
plugs
quartz
Radiation
radiation damage
radioactivity
rare earths
rhyolites
rock, sediment, soil
silica minerals
silicates
Toano Range
topaz
topaz rhyolite
trace elements
United States
volcanic rocks
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Summary:Highly radioactive topaz rhyolites of Miocene age are described from a new locality in the Toano Range of NE Nevada. Quartz phenocrysts are blackened by radiation damage. High magmatic Th and U concentrations (87 and 46 ppm, respectively) allow the rhyolites to be readily distinguished on aeroradiometric maps.
ISSN:0003-004X
1945-3027