National Geochronological Database sample #3454

Quarry, Conglomerate

Geographic location
-117.125, 40.541667
117° 7' 30" W, 40° 32' 30" N
Lander county, NV
Antler Peak 1:62,500 scale map quadrangle
Accurate to within 1 minute (~1 mile)
ANTLER PEAK (BATTLE MOUNTAIN) RANGE; COPPER CANYON MINE, 6,500-FOOT BENCH AT SW1/4 SEC. 22, T31N, R43E
Source of sample Quarry
Rock name Conglomerate
Description RECRYSTALLIZED MATRIX OF BATTLE CONGLOMERATE FROM ONE ZONE IN BATTLE CONGLOMERATE
Laboratories USGS Menlo Park
Compiler name Nichols, S.L.
Date compiled 1978 02
Precision of location Accurate to within 1 minute (~1 mile)
Location comment ANTLER PEAK (BATTLE MOUNTAIN) RANGE; COPPER CANYON MINE, 6,500-FOOT BENCH AT SW1/4 SEC. 22, T31N, R43E
Bibliographic reference Silberman, M.L., and Mckee, E.H., 1971, K-Ar Ages Of Granitic Plutons In North-Central Nevada: Isochron/West, No. 1, p. 15-32.
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Geologic map unit -117.125, 40.541667
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K-Ar age determinations

Age estimate 38.03 ± 0.7Ma
age of metamorphic crystallization
Type of analysis conventional K-Ar
Rock or mineral analyzed whole rock
SULFIDES REMOVED BEFORE ANALYSIS
Analytical details
Lab sample ID 23. USGS(M)-MB52
Decay constants 4.72E-04, 0.585E-04, 1.19E-04*
K2O concentration 2.55 %
Radiogenic 40Ar concentration 1.411
Radiogenic Ar 52 %
Comments APPARENT AGE OF MINERALIZATION