Columbia Mine group, Cababi Mining District (Comobabi Mining District), Comobabi Mountains, Tohono O'odom (Papago) Indian Reservation, Pima Co., Arizona, USAi
|Regional Level Types|
|Columbia Mine group||- not defined -|
|Cababi Mining District (Comobabi Mining District)||Mining District|
|Comobabi Mountains||Mountain Range|
|Tohono O'odom (Papago) Indian Reservation||Reservation|
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Latitude & Longitude (WGS84):
32° 3' 29'' North , 111° 47' 14'' West
Latitude & Longitude (decimal):
Köppen climate type:
‡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).
Select Mineral List TypeStandard Detailed Strunz Dana Chemical Elements
Detailed Mineral List:
| ⓘ Chalcocite|
Reference: Keith, Stanton B. (1974), AZ Bur. of Geol. & Min. Technology, Geol. Survey Br. Bull. 189, Index of Mining Properties in Pima County, AZ: 110 (Table 4); Arizona Bureau of Mines files data.
| ⓘ Cinnabar|
Reference: MRDS database Dep. ID file #10108976, MRDS ID #M000688.
List of minerals arranged by Strunz 10th Edition classification
|Group 2 - Sulphides and Sulfosalts|
List of minerals arranged by Dana 8th Edition classification
|Group 2 - SULFIDES|
|AmBnXp, with (m+n):p = 2:1|
|AmXp, with m:p = 1:1|
List of minerals for each chemical element
|USGS MRDS Record:||10108976|
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