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Middle Butte Mine (Rosamond Clay; Trent), Middle Buttes deposit (Cactus deposit), Middle Butte, Rosamond, Mojave-Rosamond District (Mojave District), Kern Co., California, USA

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Latitude & Longitude (WGS84): 34° 57' 29'' North , 118° 16' 6'' West
Latitude & Longitude (decimal): 34.9580555556, -118.268333333
 
A former Au-Ag-U occurrence/mine located in the SW¼ sec. 16, T10N, R13W, SBM, along the upper E slope of Middle Butte, about 8 miles SW of Mojave. The property comprises 160 acres. Owned by the Middle Butte Mine, Inc., Santa Ana, California (1949- ). MRDS database stated accuracy for this location is 500 meters.

Mineralization is hosted in rhyolite. The ore body strikes N26W and dips 35NE at a thickness of 2.44 meters. The vein is 6 to 8 feet in thickness. The ore shoot is 150 feet long. Gold occurs free and finely disseminated through the brecciated vein. The gangue is quartz. Local rocks include Tertiary intrusive rocks (hypabyssal), unit 7 (Northern Mojave Desert).

Workings include surface and underground openings. The ore shoot was mined from surface to 80 feet on dip, 150 feet in length and 8 feet in thickness. Considerable exploration work below the stope failed to disclose a downward extension of the ore shoot.

Production was said to be in excess of $150,000 (period values). The ore averaged $70 (period values)/ton. No specific production records were found.

Mineral List



4 entries listed. 4 valid minerals.

The above list 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

Tucker, W. Burling, Reid J. Sampson, & Gordon Blaisdell Oakeshott (1949), Mineral resources of Kern County, California: California Journal of Mines and Geology; California Division of Mines (Report 45): 45(2): No. 2, 229, Pl. 17.

Walker, G.W., et al (1956), Radioactive deposits in California: California Division Mines Special Report 49: 15, 17.

Troxel, Bennie Wyatt & P.K. Morton (1962), Mines and mineral resources of Kern County, California: California Division Mines & Geology County Report No. 1, 370 pp.: map No. 453, 117, 242.

Southern Pacific Co. (1964b), Minerals for Industry, Vol. III - Southern California: 53.

Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 62, 90.

Clark, Wm. B. (1970a) Gold districts of California: California Division Mines & Geology Bulletin 193.

Minobras (1978), Uranium Deposits of Arizona-California-Nevada: 87.

Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 23 (map 2-11), 264, 328, 437.

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10048713, 10076747 & 10139571.

U.S. Bureau of Mines, Minerals Availability System (MAS) file #0060290268.

 
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