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
|
|---|---|
| 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
|
|---|---|
| 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 % |