National Geochronological Database sample #3148

Outcrop or artificial surface exposure, Quartz monzonite

Geographic location
-117.130278, 40.531389
117° 7' 49" W, 40° 31' 53" N
Lander county, NV
Antler Peak 1:62,500 scale map quadrangle
Accurate to within 1 minute (~1 mile)
SOUTH-CENTRAL T31N, R43E, AT COPPER CANYON
Source of sample Outcrop or artificial surface exposure
Rock name Quartz monzonite
Description FROM COPPER CANYON QUARTZ MONZONITE PORPHYRY. QUARTZ (40%), ANDESINE (30%), ORTHOCLASE (25%), AND SEVERAL PERCENT BIOTITE. SIXTY PERCENT OF ROCK GENERALLY IS PHENOCRYSTS OF ALL ABOVE MINERALS.
Laboratories USGS Reston
Compiler name Nichols, S.L.
Date compiled 1977 12
Precision of location Accurate to within 1 minute (~1 mile)
Location comment SOUTH-CENTRAL T31N, R43E, AT COPPER CANYON
Bibliographic reference Jaffe, H.W., Gottfried, D., Waring, C.L., and Worthing, H.W., 1959, Lead-alpha age determinations of accessory minerals of igneous rocks (1953-1957): U.S. Geological Survey Bulletin 1097-B, 147 pp.
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Geologic map unit -117.130278, 40.531389
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