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Forty-nine Mine (Forty Nine Mine; 49 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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Latitude & Longitude (WGS84): 31° 52' 17'' North , 110° 38' 26'' West
Latitude & Longitude (decimal): 31.8713888889, -110.640555556
Other regions containing this locality:Sonoran Desert, North America


‡Ref.: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 149.

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

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).

Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 158.

USGS Empire Mountains Quadrangle topo map.

Arizona Bureau of Mines file data.

MRDS database Dep. ID file #10137515, MAS ID #0040190225.

A former underground Pb-Cu-Zn-Au-Ag mine located in the NE ¼ sec. 18, T.18S., R.17E., and joins the Jerome No. 2 on the south and is on patented ground (private property). Owned at times, or in part, by the Arizona Lead and Copper Co.; Schley; Middleton Mines, Inc.; Hoff; Hilton; and the St. Louis Smelting & Refining Co.

Mineralization is oxidized, irregular, elongated replacement orebodies containing base metal carbonates and minor sulfides with calcite, aragonite, quartz and siderite along the intersection of beds with the southeast contact of a rhyolite porphyry dike, and pipe-like bodies on the northwest contact, in strongly faulted and fissured Permian limestone and quartzite beds parallel to the faulted hyolite porphyry dike, dipping about 60º northwestward, and extends northeasterly through this and the Chief Mine. Ore was controlled by fissure intersections and occurs below the diorite. The vein is here about 8 feet wide.

Workings include an inclined, 116 foot deep shaft and a drift. Principal workings are on the 80 level. Worked from the early 1900's to 1937. Produced some 2,000 tons of ore averaging about 18% Pb, 5% Cu, some Zn, and 7 oz. Ag and minor Au/T.

Mineral List


7 valid minerals.

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