Mineralization is varied: (1) Gold-bearing Quaternary gravels, up to 15 feet thick, in gulches, benches, and terraces over Tertiary sediments on a North-sloping pediment faulted against Mesozoic schist and gneiss of the mountain mass; (2) Zone of variable marble interbedded with schist and quartzite, about 150 feet wide, in metamorphosed Mesozoic sedimentary beds, crossing the North end of the Gila Mountains; and (3) Spotty and weak oxidized copper and gold ores in irregular, lensing quartz veins cutting metamorphosed Mesozoic sediments.
Workings are mostly dry placer operations worked mainly from 1858 to about 1865, and sporadically, on smaller scale, mainly from 1931-1943 and 1946-1950. Estimated and recorded production would be close to 26,000 oz. Au and about 1,200 oz. Ag. Also shallow prospects.
ReferencesWilson, E.D. (1933) Geology and Mineral Deposits of Southern Yuma County, Arizona. Arizona Bureau of Mines Bulletin 134: 181-189, 200-201, 202-207, 208-210.
Wilson, E.D. (1961) Gold Placers and Placering in Arizona. Arizona Bureau of Mines Bull. 168 (revised 1978): 18-21.
Johnson, M.G. (1972), Placer gold deposits of Arizona, USGS Bull. 1355, 103p.: 67-69.
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: 145 (Table 4).
Arizona Bureau of Mines file data.
Mineral ListMineral list contains entries from the region specified including sub-localities
12 entries listed. 7 valid minerals.
Localities in this Region
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.
This page is currently not sponsored. To sponsor this page click here.
|Fade toolbar when not in focus||Fix toolbar to bottom of page|
|Hide Social Media Links|
|Slideshow frame delay||seconds|