Outcrop or artificial surface exposure, Granodiorite
| Geographic location |
-116.691667, 40.308333
116°
41'
30"
W,
40°
18'
30"
N
Lander county,
NV
Crescent Valley
1:62,500 scale map quadrangle
Accurate to within 1 minute (~1 mile)
NORHTERN SHOSHONE RANGE; SE1/4 SEC. 8, T28N, R47E
|
|---|---|
| Source of sample | Outcrop or artificial surface exposure |
| Rock name | Granodiorite |
| Description | TENABO STOCK; PORPHYRITIC BIOTITE-HORNBLENDE GRANODIORITE |
| 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 | NORHTERN SHOSHONE RANGE; SE1/4 SEC. 8, T28N, R47E |
| 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 | -116.691667, 40.308333 |
| Nearby scientific data | Find additional scientific data near this location |
| Age estimate | 38.31 ± 0.8Ma age of intrusion
|
|---|---|
| Type of analysis | conventional K-Ar REPLICATE ARGON ANALYSES
|
| Rock or mineral analyzed | biotite 5% CHLORITE
|
| Analytical details | |
| Lab sample ID | 10. USGS(M)-M123 |
| Decay constants | 4.72E-04, 0.585E-04, 1.19E-04* |
| K2O concentration | 7.99 % |
| Radiogenic 40Ar concentration | 4.454 |
| Radiogenic Ar | 8183 % |
| Age estimate | 39.13 ± 0.8Ma age of intrusion
|
| Type of analysis | conventional K-Ar |
| Rock or mineral analyzed | hornblende 1% BIOTITE, 1% PYROXENE
|
| Analytical details | |
| Lab sample ID | 10. USGS(M)-M123 |
| Decay constants | 4.72E-04, 0.585E-04, 1.19E-04* |
| K2O concentration | 1.077 % |
| Radiogenic 40Ar concentration | 0.6133 |
| Radiogenic Ar | 71 % |