Outcrop or artificial surface exposure, Granodiorite
| Geographic location |
-110.962778, 33.406944
110°
57'
46"
W,
33°
24'
25"
N
Gila county,
AZ
Inspiration
1:24,000 scale map quadrangle
Accurate to within 1 minute (~1 mile)
GOLD GULCH, PINTO VALLEY, GLOBE-MIAMI DISTRICT
|
|---|---|
| Source of sample | Outcrop or artificial surface exposure |
| Rock name | Granodiorite |
| Description | ALTERED 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 | GOLD GULCH, PINTO VALLEY, 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 | -110.962778, 33.406944 |
| Nearby scientific data | Find additional scientific data near this location |
| Age estimate | 58.5 ± 0.7Ma |
|---|---|
| Type of analysis | conventional K-Ar |
| Rock or mineral analyzed | biotite |
| Analytical details | |
| Lab sample ID | 22 |
| Decay constants | 4.962E-04, 0.581E-04, 1.1167E-04 |
| Radiogenic 40Ar concentration | 7.4159 |
| Radiogenic Ar | 74 % |
| Comments | PRECAMBRIAN AGE HAS BEEN RESET BY LATE CRETACEOUS-PALEOCENE THERMAL EVENTS. TIME OF MINERALIZATION |