National Geochronological Database sample #17455

Outcrop or artificial surface exposure, Granite

Geographic location
-112.833333, 38.583333
112° 50' " W, 38° 35' " N
Millard county, UT
Pinnacle Pass 1:24,000 scale map quadrangle
Accurate to within 0.1 minute (~500 feet)
Source of sample Outcrop or artificial surface exposure
Rock name Granite
Laboratories University of Utah
Compiler name Roland, R.
Date compiled 1993 08
Precision of location Accurate to within 0.1 minute (~500 feet)
Bibliographic reference Nielson, D.L., Evans, S.H., and Sibbett,B.S., 1986, Magmatic, structural, and hydrothermal evolution of the Mineral Mountains intrusive complex, Utah: Geological Society of America Bulletin, v. 97, p. 765-777.
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Geologic map unit -112.833333, 38.583333
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K-Ar age determinations

Age estimate 9.63 ± 0.55Ma
age of intrusion
Type of analysis conventional K-Ar
Rock or mineral analyzed whole rock
Analytical details
Lab sample ID mr-79-152
Decay constants 4.962E-04, 0.581E-04, 1.1167E-04
K2O concentration 5.23 %
Radiogenic 40Ar concentration 0.727
Radiogenic Ar 74 %