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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 MountainsMountain Range
Tohono O'odom (Papago) Indian ReservationReservation
Pima Co.County
ArizonaState
USACountry

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Key
Latitude & Longitude (WGS84):
32° 3' 29'' North , 111° 47' 14'' West
Latitude & Longitude (decimal):
Nearest Settlements:
PlacePopulationDistance
Ali Chukson132 (2011)16.1km
Sells2,495 (2011)18.5km
Topawa299 (2011)27.4km
Gu Oidak188 (2011)28.5km
Cowlic135 (2011)33.6km


‡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 Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


2 valid minerals.

Detailed Mineral List:

Chalcocite
Formula: Cu2S
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
Formula: HgS
Reference: MRDS database Dep. ID file #10108976, MRDS ID #M000688.

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Chalcocite2.BA.05Cu2S
Cinnabar2.CD.15aHgS

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 2:1
Chalcocite2.4.7.1Cu2S
AmXp, with m:p = 1:1
Cinnabar2.8.14.1HgS

List of minerals for each chemical element

SSulfur
S ChalcociteCu2S
S CinnabarHgS
CuCopper
Cu ChalcociteCu2S
HgMercury
Hg CinnabarHgS

Other Databases

USGS MRDS Record:10108976

Other Regions, Features and Areas containing this locality

North America
North America PlateTectonic Plate
USA

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