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Marconi Mine group, Pima Mining District (Olive Mining District; Mineral Hill Mining District; Twin Buttes Mining District), Sierrita Mountains, Pima Co., Arizona, USAi
Regional Level Types
Marconi Mine group- not defined -
Pima Mining District (Olive Mining District; Mineral Hill Mining District; Twin Buttes Mining District)Mining District
Sierrita MountainsMountain Range
Pima Co.County

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Latitude & Longitude (WGS84):
31° 52' 50'' North , 111° 4' 10'' West
Latitude & Longitude (decimal):
Nearest Settlements:
Green Valley21,391 (2011)7.7km
Sahuarita25,707 (2017)13.7km
East Sahuarita1,622 (2006)15.0km
Arivaca Junction1,090 (2011)17.0km
Amado295 (2011)19.2km

‡Ref.: Keith, Stanton B. (1974), Arizona Bureau of Geology & Mineral Technology, Geology Survey Branch Bull. 189, Index of Mining Properties in Pima County, Arizona: 135 (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).

USGS Twin Buttes Quadrangle topo map.

Arizona Bureau of Mines file data.

MRDS database Dep. ID file #10026757, MRDS ID #M000090; and, Dep. ID 10280549, MAS ID #0040190310.

A former small underground Zn-Pb-Cu-Ag-Au mine located in North-central sec. 12, T.18S., R. 12E. (Twin Buttes 15 minute topo map), 2 miles SW of Twin Buttes on private land. Produced 1948. Owned by Hilzinger. Operators included H.G. Lynch.

Mineralization is spotty, largely oxidized zinc, lead and minor copper minerals along strong fracture zones in Cretaceous arkose and conglomerate.

Workings include inclined shafts. Some 350 tons of ore were produced in 1948. This ore averaged about 6% Zn, 3% Pb, 2 oz. Ag/T and minor Cu & Au.

List of minerals for each chemical element

Other Databases

USGS MRDS Record:10026757

Other Regions, Features and Areas containing this locality

North America
North America PlateTectonic Plate

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