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Gold Hill Mine (Gold Hill claims; Tri-Metallic group), Yavapai Co., Arizona, USA

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Latitude & Longitude (WGS84): 34° 28' 15'' North , 112° 36' 14'' West
Latitude & Longitude (decimal): 34.47083,-112.60389

Ref.: Yavapai Magazine (1918) April, 1918: 4-8 (Sharlot Hall Museum, Prescott, AZ).

Johnston, W.P. (1955) Copper Basin Deposits, Ph.D. thesis, University of Utah, 130pp. (unpublished).

Christman, Jerry (1978) Copper Basin District, M.S. thesis, University of Arizona, 78 pp. (unpublished).

U.S. Bureau of Mines - Arizona Bureau of Geology and Mining Technology file data.

USGS Wilhoit Quadrangle map.

Arizona Department of Mineral Resources Gold Hill file.

MRDS database Dep. ID #10048061, MRDS ID #M800030; and, Dep. ID #10234666, MAS D #0040250816.

A former underground Cu-Au-Ag-Pb-Te-Se mine. Produced 1936.

Mineralization is a vein deposit with an irregular ore body. Ore control was localization along fissure systems in addition to disseminated ore. Ore concentration was oxidation and enrichment at near surface. Alteration is sericitization and argillization.

Area structures include foliation N20E to N20W, with a steep dip westward. Fissure systems trend N60-75W and N55-70E.

Mineral List

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

1600 - 1800 Ma
Early Proterozoic granitic rocks

Age: Statherian (1600 - 1800 Ma)

Description: Wide variety of granitic rocks, including granite, granodiorite, tonalite, quartz diorite, diorite, and gabbro. These rocks commonly are characterized by steep, northeast-striking foliation. (1600-1800 Ma)

Comments: ~ 1.6 - 1.8 Ga

Lithology: Major:{granite,granodiorite,tonalite}, Minor:{quartz diorite,diorite,gabbro}

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]

1600 - 2500 Ma
Government Canyon Tonalite

Age: Proterozoic (1600 - 2500 Ma)

Description: Medium-grained, equigranular hornblende-biotite stock (Krieger, 1965) having average composition of tonalite. Exposed from east of Granite Mountain to south of Wilhoit. Redescribed herein to tonalite, based on chemical com­position. Undeformed in many eastern outcrops, but strongly deformed west of Copper Basin and mildly deformed in central Bradshaw Mountains. Ranges in composition from alkali-calcic gabbro-diorite to calc-alkalic grano­diorite. Very sodic to average and very Mg rich to Mg rich. Age, from U-Pb zircon analyses, is about 1,740 Ma (Anderson and others, 1971)

Reference: DeWitt, E., V. Langenheim, E. Force, R.K. Vance, P.A. Lindberg, R.L. Driscoll. Geologic map of the Prescott National Forest and the headwaters of the Verde River, Yavapai and Coconino Counties, Arizona. Scientific Investigations Map SIM-2996. [99]

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

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