‡Ref.: Willis, C.F. (1915) Las Guijas placer: State Magazine and Pathfinder: 6(1): 10.
Allen, M.A. (1922) Arizona gold placers: Arizona Bureau of Mines Bulletin No. 118, 24 p., 1 sheet: 10-11.
Wilson, E.D. (1927) Arizona gold placers (Second edition, Revised): Arizona Bureau of Mines Bulletin no. 124, 60 p.: 43-44.
Arizona Bureau of Mines Bull. 135 (1933), Arizona Gold placers & palcering: 61-63.
Wilson, E.D. (1961) Gold Placers and Placering in Arizona. Arizona Bureau of Mines Bull. 168 (revised 1978): 78-80.
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).
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 236.
Arizona Bureau of Mines file data.
MRDS database Dep. ID file #10113754, MAS ID #0040190278.
A former surface Au-Ag-Hg placer deposit area located in the sec. 25, T.20S.,R.9E., secs. 30, 31 & 32, T.20S., R.10E., & sec. 5, T.21S., R.10E., Las Guijas Mountains vicinity, immediately NW of Arivaca, and about 50 miles SSW of Tucson. Started in the 1860's. Owned by the New Venture Placer Mining Co.
Mineralization is generally very fine gold with a few nuggets in gravels on pediment slopes, old terraces or 'mesas', and in verious gulches and washes along Las Guijas Wash at or near true of false bedrock. Often admixed with clay.
Workings include dry and wet placer operations from prior to 1900. Reworked intermittently in the 1930's and early 1940's. Total production is estimated at about 1,000 oz. Au with some Ag.
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