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Gopher Mine (Go Pher Mine), Prince Mine group, Hilton Mines (Hilton Mine group; Hiltano group; Hiltano & State of Maine group), Copper Camp, Hilton (Lead Mountain), Empire District, Empire Mts, Pima Co., Arizona, USA

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‡Ref.: Schrader, F.C. (1915) Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, with contributions by J.M. Hill: U.S. Geological Survey Bulletin 582, 373 p., 3 sheets, scale 1:125,000: 148.

Feiss, J.W. (1929) Geology and ore deposits of Hiltano Camp, Arizona: Tucson, University of Arizona, M.S. thesis, 41 p.

Wilson, E.D., et al (1951), Arizona zinc and lead deposits, part II, Arizona Bureau of Mines Bull. 158: 55.

Creasey, S.C. (1973) Field Examination, Gopher Mine.

Keith, Stanton B. (1974), Arizona Bureau of Geology & Mineral Technology, Geological Survey Branch Bull. 189, Index of Mining Properties in Pima County, Arizona: 118 (Table 4).

Arizona Bureau of Mines file data.

MRDS database Dep. ID file #10039627, MRDS ID #M050523; and, Dep. ID #10162284, MAS ID #0040190236.

A former small underground Pb-Cu-Zn-Au-Ag-Mo mine located in the NE ¼ sec. 18 and sec. 7, T.18S., R.17E., 10 miles SSW of Pantano. Discovered 1879. Owned at times, or in part, by Sullivan & Pantano; E.P. Hilton; and, McMahon.

Mineralization is secondary lead minerals, copper carbonates and residual sulfides in irregular replacement orebodies and chimneys (coarse stockwork) along fissure intersections of fissures of northeast and northwesterly trend, in folded and faulted Permian limestone intruded by Laramide dikes. Host rock unit is the Concha Limestone. Ore control was fissure intersections. Alteration was massive sulfide gossan, contact metamorphism adjacent to granite. An associated rock unit is the Sycamore Canyon Quartz Monzonite. The ore body strikes SSW and dips steeply NW.

Local structures include folded and faulted limestone blocks along NW faults.

Workings include inclined shaft operations. Developed to the 300 level as of 1939. Worked irregularly since the late 1800's to 1930, producing some 1,200 tons of ore averaging about 20% Pb, 3% Zn, 0.8% Cu, 1.5 oz. Ag/T and minor Au.

Mineral List

6 entries listed. 6 valid minerals.

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