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
|
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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 |
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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 |