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Bonanza Mine (Little Bonanza Mine; Fairview Mine), Gold Hill, Sonora, Sonora District, East Belt, Tuolumne Co., California, USA

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Latitude & Longitude (WGS84): 37° 59' 8'' North , 120° 23' 2'' West
Latitude & Longitude (decimal): 37.98556,-120.38389


A former lode Au mine located at Gold Hill at the N end of Sonora, within the city limits. The claim is acres at the head of Washington Street.

Mineralization is hosted in limestone and mica schist.

Mineral List


4 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

Triassic - Ordovician
201.3 - 485.4 Ma
Paleozoic marine rocks, undivided, unit 4 (Western Sierra Nevada)

Age: Phanerozoic (201.3 - 485.4 Ma)

Stratigraphic Name: Calaveras Complex (part); Shoo Fly Complex (part); Blue Canyon Formation; Briceburg Formation; Cape Horn Slate; Delhi Formation; Hite Cove Formation; Kanaka Formation; Relief Quartzite; Tightner Formation

Description: Undivided Paleozoic metasedimentary rocks. Includes slate, sandstone, shale, chert, conglomerate, limestone, dolomite, marble, phyllite, schist, hornfels, and quartzite

Comments: Western Sierra Nevada. Lower Paleozoic Shoo Fly Complex and upper Paleozoic to lower Mesozoic Calaveras Complex, undivided. Deformed and metamorphosed rocks composed primarily of quartzite, argillite, and chert; includes melange

Lithology: Major:{argillite,quartzite,phyllite}, Minor:{mudstone,sandstone,chert}, Incidental:{schist, marble, conglomerate, sedimentary breccia, limestone, basalt}

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



This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Sharwood, William J. (1911), Notes on tellurium-bearing gold ores: Economic Geology: 6: 26.

Tucker, W. Burling (1914), Tuolumne County: California Mines Bureau Report 14: 141.

Logan, Clarence August (1949), Mines and mineral resources of Tuolumne County, California: California Journal of Mines and Geology: 45(1): 60.

Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 61, 219, 287.

Mineral and/or Locality  
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