Las Guijas tungsten placers, Las Guijas Mts, Arivaca District (Las Guijas District), Las Guijas & San Luis Mts, Pima Co., Arizona, USA
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Dale, V.B., Stewart, L.A., and McKinney, W.A. (1960), Tungsten deposits of Cochise, Pima, and Santa Cruz Counties., Arizona, U.S. Bureau of Mines Report of Investigation 5650: 105.
Keith, Stanton B. (1974), Arizona Bureau of Geology & Mineral Technology, Geological Survey Branch Bull. 189, Index of Mining Properties in Pima County, Arizona: 106 (Table 4).
Arizona Bureau of Mines file data.
MRDS database Dep. ID file #10039532, MRDS ID #M050229; and, Dep. ID #10113255, MAS ID #0040190280.
A former small surface W placer deposit area and mine located in secs. 12, 23, 24 & 25, T.20S., R.9E., on the NE slopes of the Las Guijas Mountains, 5 to 10 miles NNW of Arivaca. Started during WWI & owned by C.E. Udall & M.J. Mitchell.
Mineralization is wolframite & scheelite, with quartz, in alluvium and stream gravels below tungsten-bearing quartz veins and lenses in the Las Guijas Mountains, and the Black Gold area to the North.
Workings include dry & wet placer operations. A few tons of wolframite concentrates were produced, mainly during WWI. Intermittent operation since, especially after heavy rains.
2 entries listed. 1 valid mineral.
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