Latitude: 32°3'29"N
Longitude: 111°47'14"W
‡Ref.: Keith, Stanton B. (1974), Arizona Bureau of Geology & Mineral Technology, Geological Survey Branch Bull. 189, Index of Mining Properties in Pima County, Arizona: 110 (Table 4).
Niemuth, N.J. & K.A. Phillips (1992), Copper Oxide Resources, Arizona Department of Mines & Mineral Resources Open File Report 92-10: 12 (Table 1).
Arizona Bureau of Mines files data.
MRDS database Dep. ID file #10108976, MRDS ID #M000688.
A former small underground Cu-Ag-Au mine group located in South-central sec. 1 (12 ?), T.16S., R.5E. (protracted)(Comobabi 7.5 minute topo map), at Comobabi. Produced 1907. Owned at times, or in part, by Weldeman; and the Papago Copper Co.
Mineralization is spotty copper carbonates and chalcocite in an irregular quartz vein along a fissure zone in Laramide granitic rocks. Minor cinnabar is present. Gold the size of mustard seed to 0.15 oz was common; several nuggets of 0.73 oz were recovered. The source of the gold is believed to be tourmaline-quartz veins in Precambrian rock.
Workings include tunnels. A relatively small tonnage of ore averaging about 0.1 oz. Au/T, 29 oz. Ag/T, and 19% Cu, were produced in 1907.
Placers are found in gulches that dissect the pediment slope on the SW flank of the Sierra Prieta and in the gravel-floored plain between this pediment and Skull Valley. The richest placers are on the gravel-floored plain west and south of Copper Basin (T13N, R4W).
Mineral List
2 entries listed. 2 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
