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Little Johnny Mine, Stevens Mountain, Papago District (Sierrita District), Sierrita Mts, Pima Co., Arizona, USA

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Latitude & Longitude (WGS84): 31° 55' 46'' North , 111° 17' 27'' West
Latitude & Longitude (decimal): 31.9294444444, -111.290833333
 
‡Ref.: Ransome, F.L. (1922) Ore deposits of the Sierrita Mountains, Pima County, Arizona, in Contributions to Economic Geology (Short Papers and Preliminary Reports), 1921 - Part I.--Metals and Nonmetals except Fuels: U.S. Geological Survey Bulletin 725J: 417.

Keith, Stanton B. (1974), Arizona Bureau of Geology & Mineral Technology, Geological Survey Branch Bull. 189, Index of Mining Properties in Pima County, Arizona: 132 (Table 4).

Arizona Bureau of Mines file data.

A Pb-Ag-Mn-Cu-Au-Mo mine located in South-central sec. 23, T.17S., R.10E.

Mineralization is manganiferous veins and replacement lenses containing spotty, oxidized argentiferous galena and minor sulfides with wulfenite in fractured and metamorphosed Paleozoic limestone.

Workings include shafts and pits. Worked by 'chloriders' for silver in the late 1800's and by prospectors in 1937-1938. Total production was only some 100 tons between the Big Johnny & Little Johnny Mines. Ore averaged over 20 oz. Ag/T with good lead values and minor copper.

Mineral List



4 entries listed. 3 valid minerals.

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