Outcrop or artificial surface exposure, Quartz monzonite
Geographic location |
-110.945, 33.397778
110°
56'
42"
W,
33°
23'
52"
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 | Quartz monzonite |
Description | LOST GULCH QUARTZ MONZONITE |
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 | -110.945, 33.397778 |
Nearby scientific data | Find additional scientific data near this location |
Age estimate | 60.9 ± 0.7Ma |
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Type of analysis | conventional K-Ar |
Rock or mineral analyzed | biotite |
Analytical details | |
Lab sample ID | 42 |
Decay constants | 4.962E-04, 0.581E-04, 1.1167E-04 |
Radiogenic 40Ar concentration | 8.4456 |
Radiogenic Ar | 73 % |
Comments | PRECAMBRIAN AGE HAS BEEN RESET BY LATE CRETACEOUS-PALEOCENE THERMAL EVENTS |