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Pat Alunite deposit (Pat property; Patagonia property), Palmetto District, Patagonia Mts, Santa Cruz Co., Arizona, USA

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Ref.: Schrader, F.C. (1913) Alunite in Patagonia, Arizona, and Bovard, Nevada: Economic Geology: 8(8): 752-767.

Schrader, F.C. (1914) Alunite in granite porphyry near Patagonia, Arizona, in Contributions to economic geology (short papers and preliminary reports) 1912: Part I--Metals and nonmetals except fuels: U.S. Geological Survey Bulletin 540, p. 347-350.

Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 361-364.

Engineering and Mining Journal, September, 1974.

Sawyer, M.B., Gurmendi, A.C., Daley, M.R., and Howell, S.B. (1992) Principal Deposits of Strategic and Critical Minerals in Arizona, U.S. Bureau of Mines Special Publication, 334 pp.

MRDS database Dep. ID file #10009276, MRDS ID #D002154; and, Dep. ID #10234982, MAS ID #0040230001.

A K-Alunite-Talc-Kaolin deposit/occurrence with surface and underground workings, on BLM land. Discovered 1909 by F.C. Schrader, USGS. Owned by the Earth Sciences, Inc.; National Steel Corp.; and the Southwire Co. (1975). NOTE: Alternate coordinates provided: 31.5058N, 110.7264W.

Mineralization is highly irregular and discontinuous elongated blanket or lens of alunite. Rhyolite and andesite were replaced by ore. Ore control was intrusions and lithology. Alteration is phyllic and sericitic. Associated rock units are the Comoro Granite and the Munt Wrightson formation. F.S. Simons unpublished X-ray data suggest that alunitization is extensive but irregular. There is much kaolinite, sericite, and pyrophyllite. Alteration affected at least four distinct formations mapped by Simons (1974).

The alunitized zone extends southeastward into the adjoining Lochiel 15 minute quadrangle. The USBM gives the location as 31-30-21N, 110-43-35W in sec. 21, T22S, R16E.

There were numerous mines worked formerly for base and precious metals but no development of alunite. After 1972, an aerial survey, bedrock sampling, and drilling were conducted. As of 1974, Earth Sceinces, Inc. held federal potassium prospecting permits on 6,813.11 acres.

All mine works were for metals, not alunite. Simons mapped an intermittently alunitized zone 15,000 feet long, 3,500 feet wide, trending N20W. Schrader described alunite near the 3R Mine. Data are insufficient to estimate reserves. There was considerable production of base and precious metals; no alunite production.

Mineral List

4 entries listed. 3 valid minerals.

The above list contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.
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