Harper Mine (Ashworth Mine; Harper group of claims; Harper property; Rincon claim), Bear Canyon, Hartford District (Huachuca Mountains District), Huachuca Mts, Cochise Co., Arizona, USA
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Galbraith, F.W. & D.J. Brennan (1959), Minerals of Arizona: 81.
Dale, V.B., et al (1960), Tungsten deposits of Cochise, Pima, and Santa Cruz Counties, Arizona, U.S. Bureau of Mines Report of Investigation 5650: 35-37.
Hayes, P.T., and Raup, R.B. (1968) Geologic map of the Huachuca and Mustang Mountains, southeastern Arizona: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-509, 1 sheet, scale 1:48,000.
Keith, Stanton B. (1973), Arizona Bureau of Geology & Mineral Technology, Geol. Sur. Branch Bull. 187, Index of Mining Properties in Cochise County, Arizona: 65 (Table 4).
Ludington, S. (1984) Preliminary mineral-resource assessment of the proposed Miller Peak Wilderness, Cochise County, Arizona: U.S. Geological Survey Open-File Report 84-0293, 10 p.: 3-4.
Tuftin, S.E. and Armstrong, R.C. (1994) U.S. Bureau of Mines Open File Report Mineral Land Assessment (MLA) 1-94.
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MRDS database Dep. ID file #10039572, MRDS ID #M050354; and, Dep. ID #10185976, MAS ID #0040030152.
A former small surface and underground Au-Ag-W-Cu-Pb mine located on 2 unpatented claims in South-central sec. 30, T.23S., R.20E., lower Bear Canyon, at approximately 6,000 feet of altitude, on private land. First produced 1900. Owned by the Tungsten Mining Co.
Mineralization is 4 quartz veins which crop out, with scheelite in two of them. The thickness is 6 inches at surface to 12-18 inches thick from dump material. These veins strike Northward (N25W - N20-30E) and dip from medium angles to almost vertical (30-60SW or 40NW). Prevailing rocks are Mesozoic maroon shale and sandstone intruded on the NE and South by granite. One vein dips 55º West and averages about 1½ feet (0.5 meters) thick. Mineralization is sporadic gold and silver values with scattered scheelite and sulfides in coarsely-crystalline, grayish-white quartz veins cutting Cretaceous Glance Conglomerate and andesitic volcanics containing exotic blocks of Paleozoic limestone.
Workings are surface and shallow shaft workings. Minor production of gold-silver ore was made in the early 1900's. Several hundred tons of tungsten concentrates were produced in 1941. The gold grade was reported as 0.31 oz/ton.
7 entries listed. 7 valid minerals.
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