Alamo Springs Mine (Alamo Springs Area deposit; Wetmore deposit), Pima Co., Arizona, USA
Ref.: Stone, R.W. (1920) Gypsum Deposits of the United States, USGS Bull. 697, 326 pp.
Galbraith, F.W. (1940) Gypsum: Arizona Bureau of Mines Circular 5, 6 p.
Keith, Stanton B. (1969), Gypsum, in USGS & Arizona Bureau of Mines, and U.S. Bureau of Reclamation 1969, Mineral and water resources of Arizona, Arizona Bureau of Mines Bull. 180, 638 pp.
Phillips, K.A. (1987), Arizona Industrial Minerals, 2nd. Edition, Arizona Department of Mines & Minerals Mineral Report 4, 185 pp.: 109.
Peirce, H. Wesley (1990), Arizona Geological Survey Industrial Minerals card file.
MRDS database Dep. ID file #10060183, MRDS ID #TC10140; and, Dep. ID #10210208, MAS ID #0040190093.
A former small surface Gypsum mine/deposit located in secs. 3 & 4, T13S, R14E, on private land. First produced in 1885. This location probably had historic production of gypsum, but is now a residential area.
Mineralization is a lacustrine gypsum deposit with veins of satin spar. This gypsum is fair to good grade. It is hosted in shale, sandstone and unconsolidated clay and mud. Occurrence is probably in a small fromer lake bed. A near vertical fault passes through the pit and has a throw of about 10 inches. Several 1 to 2.5 foot thick beds of massive light brown to white gypsum are separated by clay partings.
Reserves and resources believed to be small. This material was calcined for plaster in Tucson.
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Map Reference: 32°19'59"N , 110°54'23"W
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Mineral List:2 entries listed. 1 valid mineral.
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