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Leatherwood Mine group (Apache group), Mount Bigelow, Oracle District (Control District; Old Hat District; Santa Catalina District), Santa Catalina Mts, Pima Co., Arizona, USA

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Latitude & Longitude (WGS84): 32° 27' 52'' North , 110° 44' 10'' West
Latitude & Longitude (decimal): 32.46444,-110.73611
GeoHash:G#: 9tc28jurj
Other regions containing this locality:Sonoran Desert, North America
Köppen climate type:BSh : Hot semi-arid (steppe) climate


‡Ref.: Peterson, N.P., and Creasey, S.C. (1943) Some copper deposits in the Old Hat mining district, Pima County, Arizona: U.S. Geological Survey Open-File Report [unnumbered], 13 p., 13 sheets, scales 1:360, 1:600, and 1:1,200.

US Atomic Energy Commission Preliminary Reconnaissance Report Pima County (1953): 673.

Keith, Stanton B. (1974), Arizona Bureau of Geology & Mineral Technology, Geological Survey Branch Bull. 189, Index of Mining Properties in Pima County, Arizona: 131 (Table 4).

USGS Bellota Ranch Quadrangle topo map.

Arizona Bureau of Mines file data.

MRDS database Dep. ID file #10109623, MRDS ID #M050644; and, Dep. ID #10259050, MAS ID #0040190286.

A former small surface and underground Cu-Ag-Pb-Au mine located in the center of sec. 20, T. 11 S., R.16E. Operated 1939-1965. Owned/operated at times, or in part, by the Phelps Dodge Corp.; Catalina Consolidated Copper Co.; Control Mines, Inc.; Control Mines Co.; T.S. Sanford; and the Arizona Copper Mines, Inc.

Mineralization is partly oxidized copper sulfides in calcite veinlets and disseminated in skarn in pyrometamorphosed Paleozoic limestone close to the contact with Laramide quartz diorite (brecciated tactite with thin basic dikes). Lamprophyre dikes.

Workings include adits and an open pit. Some 3,000 tons of ore, averaging about 5% Cu, 1.5 oz. Ag/T and minor Au and Pb, produced intermittently from 1939 to 1968.

OXIDIZED COPPER ORE.

Geology 1 GEOL.DESC: OXIDE ORE NEAR CONTACT OF


Mineral List

Mineral list contains entries from the region specified including sub-localities

7 valid minerals.

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Quaternary - Miocene
0 - 23.03 Ma



ID: 3185380
Cenozoic sedimentary rocks

Age: Cenozoic (0 - 23.03 Ma)

Lithology: Sedimentary rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Ypresian - Campanian
47.8 - 83.6 Ma



ID: 3025891
Early Tertiary to Late Cretaceous granitic rocks

Age: Phanerozoic (47.8 - 83.6 Ma)

Description: Porphyritic to equigranular granite to diorite emplaced during the Laramide orogeny. Larger plutons are characteristically medium-grained, biotite +/- hornblende granodiorite to granite. Smaller, shallow-level intrusions are typically porphyritic. Most of the large copper deposits in Arizona are associated with porphyritic granitic rocks of this unit, and are thus named 'porphyry copper deposits'. (50-82 Ma)

Comments: Laramide metaluminous; associated with porphyry Cu deposits

Lithology: Major:{granite,granodiorite,diorite}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License


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