‡Ref.: Keith, Stanton B. (1974), Arizona Bureau of Geology & Mineral Technology, Geological Survey Branch Bull. 189, Index of Mining Properties in Pima County, Arizona: 114 (Table 4).
Arizona Bureau of Mines file data.
Yale Peabody GNIS database (NOTE: this database is derived from USGS 1:24,000 topographic map data).
MRDS database Dep. ID file #10108982, MRDS ID #M001056; and, Dep. ID #10256944, MAS ID #0040190407.
A former small underground Ag-Au-Pb-Cu-Zn-Hg mine located in the NE ¼ sec. 35, T.20S., R.10E., 6 miles NE of Arivaca. Produced 1880-1955. Owned at times, or in part, by John A. Folk (Falk ?); and, Mitchell.
Mineralization is irregular, lensing, spotty and weak, oxidized, argentiferous base metal sulfides in a lensing quartz-fissure vein in Cretaceous andesite porphyry.
Workings include shallow shaft operations. Worked intermittently from the 1880's to the early 1900's, closing in 1955. Estimated production of about 20 tons of high-grade silver ore with minor base metals.
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Map Reference: 31°39'4"N , 111°17'5"W
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