- Usage in publication:
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- Miners Spring Granite*
- Modifications:
-
- Named
- Geochronologic dating
- Dominant lithology:
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- Granite
- AAPG geologic province:
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- Great Basin province
Summary:
Named for exposures east of Miners Spring, sec 17, T36N, R70E, Miners Canyon 7.5 quad, Elko Co, NV in Great Basin province. Crops out as dikes and pods that intrude Cambrian schist and marble over an area of about 6 sq km of the eastern Pilot Range in UT. Rare boulders of muscovite-biotite granite from the Miners Spring found on west side of Pilot Peak, suggesting the formation intruded biotite-zone rocks on west side of range in NV. Consists of white to light-gray, fine- to medium-grained, equigranular, moderately foliated, muscovite-biotite syenogranite to monzogranite. The biotite is usually altered to chlorite; muscovite has, in some samples, grown from or reacted with plagioclase. Garnet, sphene, zircon, and apatite are accessory minerals. Considered to be between 155 and 165 Ma, and of Jurassic age. Geologic map.
Source: GNU records (USGS DDS-6; Denver GNULEX).
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
Asterisk (*) indicates published by U.S. Geological Survey authors.
"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).
Slash (/) indicates name conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).