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Long Valley prospect, Casa Diablo Hot Springs, Long Valley District, Mono Co., California, USA

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A Au prospect located in sec. 8, T4S, R28E, MDM, 2.9 km (9,400 feet) S of Casa Diablo Hot Springs, along Laurel Creek, on National Forest land. Owned by Standard Industrial Minerals, Inc. (100.00%) (1997); owned and operated by Royal Gold Inc. (100.00%), Colorado (1997, 1996); owned and operated by Amax Gold, Inc. (100.00%), Colorado (1997). MRDS database stated accuracy for this location is 10,000 meters (sic).

The ore body is a hot spring deposit and a lenticular replacement deposit. The primary mode of origin is hydrothermal and the secondary mode is oxidation. Primary ore control was lithology. Local rocks include Quaternary glacial deposits.

Reserve-Resource data are found in: Skillings Mining Review (1997): 86(15) (April 12, 1997): 40.

Reserves and resources data: In-situ ore: 1997: demonstrated 32,400,000 metric tons of ore at 0.650000 grams/metric tion Au.

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The above list contains all mineral locality references listed on 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 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.


Skillings Mining Review (1995) (January 7, 1995): 84(issue #?).

Northern Miner, The (1996) (June 3, 1996): PB5.

Skillings Mining Review (1997): 86(15) (April 12, 1997): 40, 60, 61.

Skillings Mining Review (1997) (September 13, 1997): 9.

Mining Journal (1997) (September 19, 1997): 329(8447): 232.

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10140266.

U.S. Bureau of Mines, Minerals Availability System (MAS) file ID #0060510220.

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