Outcrop or artificial surface exposure, Granodiorite
| Geographic location |
-110.9525, 33.396667
110°
57'
9"
W,
33°
23'
48"
N
Gila county,
AZ
Inspiration
1:24,000 scale map quadrangle
Accurate to within 1 minute (~1 mile)
GLOBE-MIAMI DISTRICT
|
|---|---|
| Source of sample | Outcrop or artificial surface exposure |
| Rock name | Granodiorite |
| Description | WILLOW SPRING GRANODIORITE |
| Laboratories | USGS Menlo Park |
| Compiler name | Marvin, R.F. |
| Date compiled | 1984 11 |
| Precision of location | Accurate to within 1 minute (~1 mile) |
| Location comment | GLOBE-MIAMI DISTRICT |
| Bibliographic reference | Creasey, S.C., 1980, Chronology Of Intrusion and Deposition Of Porphyry Copper Ores, Globe-Miami District, Arizona: Economic Geology, v. 75, p. 830-844. |
| (click for info) | |
| Geologic map unit | -110.9525, 33.396667 |
| Nearby scientific data | Find additional scientific data near this location |
| Age estimate | 57.2 ± 0.6Ma |
|---|---|
| Type of analysis | conventional K-Ar |
| Rock or mineral analyzed | biotite |
| Analytical details | |
| Lab sample ID | 46 |
| Decay constants | 4.962E-04, 0.581E-04, 1.1167E-04 |
| K2O concentration | 7.96 % |
| Radiogenic 40Ar concentration | 6.5884 |
| Radiogenic Ar | 67 % |
| Comments | RESET AGE; PLUTON IS AROUND 1600 M.Y. OLD |