Outcrop or artificial surface exposure, Quartz monzonite
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; SW1/4 SEC. 22, T31N, R43E
|
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Source of sample | Outcrop or artificial surface exposure |
Rock name | Quartz monzonite |
Description | COPPER CANYON STOCK; PORPHYRITIC BIOTITE-QUARTZ MONZONITE WITH SOME POTASSIC ALTERATION |
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; 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. |
(click for info) | |
Geologic map unit | -117.125, 40.541667 |
Nearby scientific data | Find additional scientific data near this location |
Age estimate | 39.42 ± 0.8Ma minimum age of intrusion
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Type of analysis | conventional K-Ar |
Rock or mineral analyzed | biotite |
Analytical details | |
Lab sample ID | 21. USGS(M)-M18 |
Decay constants | 4.72E-04, 0.585E-04, 1.19E-04* |
K2O concentration | 8.54 % |
Radiogenic 40Ar concentration | 4.9 |
Radiogenic Ar | 87 % |