Latitude: 31°24'18"N
Longitude: 111°15'4"W
‡Ref.: Knight, L.H., Jr. (1970) Structure and mineralization of the Oro Blanco mining district, Santa Cruz County, Arizona: Tucson, University of Arizona, Ph.D. dissertation, 172 p., 7 sheets, scales 1:1,200, 1:6,000, 1:16,000, 1:24,000, 1:60,000, 1:62,500, and 1:358,000.
Yeend, Warren (1973).
Keith, Stanton B. (1975), Arizona Bureau of Mines Bull. 191, Index of Mining Properties in Santa Cruz County Arizona: 68 (Table 4).
U.S. Bureau of Mines staff (1994) .S. Bureau of Mines Open File Report MLA XX-94.
Arizona Bureau of Mines card file Santa Cruz County.
MRDS database Dep. ID file #10039555, MRDS ID #M050273; and, Dep. ID #10234513, MAS ID #0040230074.
A former small surface and underground Au-Ag-Pb-Cu-Zn mine located in the SE¼SE¼ sec. 19, T.23S., R.11E, on National Forest land. Produced 1912-1940. Operated by the Oro Fino Mining Co. (1940). Other past operators include: Delanti (1936 and 1939), Fred Noon (1937, 1938), Daniels (1935), Williams (1912); and, Daniels.
Mineralization is lensing quartz-fissure vein with fracture fillings and partial replacement of quartz and pyrite by galena and other sulfides. Oxidation and supergene enrichment in gold and silver. Wall rock is Cretaceous sediments. The host rock unit is the Oro Blanco Formation. An associated rock unit is the Sidewinder Quartz Monzonite. Ore control was quartz veins in a fault zone. Ore concentration was supergene enrichment and oxidation. Alteration is minor.
Workings include a 340 foot deep shaft; 700 feet of underground workings; and a 580 foot long adit. Worked intermittently from the 1890's through 1940. Produced some 200 tons of ore averaging about 0.6 oz. Au/T, 3 oz. Ag/T and some Pb and Cu.
Mineral List
4 entries listed. 4 valid minerals.
The above list contains all mineral locality references listed on mindat.org. 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 mindat.org 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.
Mineral and Locality Search
