Ref.: Bancroft, H. (1911), Reconnaissance of the ore deposits in northern Yuma County, Arizona, USGS Bull. 451: 120-122.
Harrer, C.M. (1964), Reconnaissance of Iron Resources in Arizona, US Bureau of Mines Information Circular 8236: 127.
Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geological Survey Branch Bull. 192, Index of Mining Properties in Yuma County, Arizona: 163 (Table 4).
Arizona Bureau of Mines file data.
MRDS database Dep. ID file #10283259, MAS ID #0040120326.
A former underground Fe-Cu-Au-Ag-Ba-F group of mines located in the SE¼ sec. 1, East-central sec. 12, & East-central sec. 13, T8N, R15W (protracted), on land of unknown status. Owned and operated by the Corona Copper Co. of Arizona.
Mineralization is spotty, oxidized copper minerals with strong hematite and quartz and local barite, minor fluorite, and traces of sulfides in irregular fault veins or replacement deposits in Precambrian gneiss and schist and granitic breccia, cut by pegmatite, aplite and amphibolite dikes. Some epidote and chlorite.
Workings are shafts sunk in the 1890's into the early 1900's, during prospecting. A small amount of ore was produced averaging about 16% Cu, 0.8 oz. Au/T, and 1.3 oz. Ag/T in 1907.
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