‡Ref.: Arizona Department of Mineral Resources (1962), Molybdenum prospects in Arizona.
Kirkemo, H., et al (1965), Investigations of Molybdenum Deposits in the Conterminous United States 1942-60, Contributions to Economic Geology, USGS Bull. 1182-E: E14.
King (1969), Arizona Bureau of Mines Bull. 180.
Cornwall & Krieger (1975) USGS Map GQ-1206.
Kuck (1978) Ph.D thesis, University of Arizona.
MRDS database Dep. ID #10096998, MRDS ID #M000334.
A Cu-Mo deposit / prospect located in sec. 8, T.4S., R.13E., about 4 miles west of Kelvin. Owned by the Riverside Mining Co., A.H. Johnson, Phoenix, President and Manager.
Country rock at the deposit (Ruin [Oracle] Granite and Teacup Granodiorite) is coarse-grained biotite granite that is cut by east- to northeast-trending quartz porphyry and aplite dikes as much as several feet wide. Quartz veins are exposed at the surface and underground, and irregular quartz masses are exposed northeast of the shaft. Southwest of the shaft, a quartz vein ranging from 1 inch to 2 feet in width strikes N.70ºE. and dips 80ºN. Surface exposures are barren except for limonite and faint copper stains. Underground, some of the veins contain pyrite, chalcopyrite, and traces of molybdenite.
Molybdenite occurs as thin seams in the fault gouge of two fault zones that strike east to northeast. Alteration is silicification and seritization.
Workings in 1943 consisted of an 84 foot deep vertical shaft, an 80 foot crosscut extending N.15W. from the bottom of the shaft, and two drifts, 18 and 15 feet long extending west from the crosscut at 18 and 62 feet, respectively, NW of the shaft.
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Map Reference: 33°5'30"N , 111°2'0"W
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