Outcrop or artificial surface exposure, Granodiorite
| 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)
SW1/4 SEC. 22, T31N, R43E; ROADCUT IN COPPER CANYON AREA
|
|---|---|
| Source of sample | Outcrop or artificial surface exposure |
| Rock name | Granodiorite |
| Description | ALTERED GRANODIORITE OF COPPER CANYON AREA; MEDIUM- TO COARSE-GRAINED ALTERED PORPHYRITIC GRANODIORITE |
| Laboratories | USGS Menlo Park |
| Compiler name | Nichols, S.L. |
| Date compiled | 1978 04 |
| Precision of location | Accurate to within 1 minute (~1 mile) |
| Location comment | SW1/4 SEC. 22, T31N, R43E; ROADCUT IN COPPER CANYON AREA |
| Bibliographic reference | Theodore, T.G., Silberman, M.L., and Blake, D.W., 1973, Geochemistry and Potassium-Argon Ages Of Plutonic Rocks In The Battle Mountain Mining District, Lander County, Nevada: U.S. Geological Survey Professional Paper 798A, A24pp. |
| (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 age of intrusion
|
|---|---|
| Type of analysis | conventional K-Ar |
| Rock or mineral analyzed | biotite LESS THAN 1% CHLORITE; -60+100 MESH SAMPLE
|
| Analytical details | |
| Lab sample ID | 9. (MB-18) |
| Decay constants | 4.72E-04, 0.585E-04, 1.19E-04* |
| K2O concentration | 8.54 % |
| Radiogenic 40Ar concentration | 4.9 |
| Radiogenic Ar | 87 % |