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Fernando Mine, Darwin District, Inyo Co., California, USA
Latitude: 36°16'4"N
Longitude: 117°34'25"W
Longitude: 117°34'25"W
A former Tungsten mine, the Fernando mine consists of 2 patented claims that are adjacent to the Durham mine.
Both mines are accessible by the same jeep-track from the N Main Street, 2.2 miles (3.52 km) east of Darwin (1 mile as the crow flies).
The older claim was worked for Lead and Silver in 1919 and 1920 and it consists of an inclined shaft 125 feet deep. It is located north of the Tungsten portal.
The newer Tungsten mine operated in the 1940’s and 1950’s with low grade Scheelite and has 3 adits with about 1850 feet of drifts and crosscuts.
The intermediate level 230 feet above zero level and the Alameda glory hole (about 100 feet wide) have 310 feet of drifts and crosscuts.
An inclined shaft connects with the 100 feet level of the Durham mine.
The Fernando mine and the Durham mine have been worked for a time as one unit.
The rocks in this mining area consist of limestone, marble, calc-hornfels and tactite.
The minerals can be found both on the dump and in the Fernando mine.
Corrected description and position N36.26776 W117.57372 by Richard Muster, courtesy Gail Dunning, Walt Margerum and Robert Hously.
Mineral List
| Andradite Anglesite Bismuth | Bismuthinite Bismutite Cerussite | Fluorite Galena Kettnerite | Orthoclase Scheelite Vesuvianite |
12 entries listed. 12 valid minerals.
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References
Knopf, Adolph (1914) “The Darwin Lead-Silver Mining District California;” United States Geological Survey Bulletin 580-A, 19 p.
Wilson L. Kenneth (1943), Tungsten deposits of the Darwin Hills Inyo County, California Economic Geology: 38: 543-560.
Butner, D.W. (1949), Investigation of tungsten occurrences in Darwin district, Inyo County, California: U.S. Bureau of Mines Report of Investigation 4475.
Norman, L.A., and Stewart, R.A. (1951), Mines and Mineral Resources of Inyo County, California, California Division of Mines and Geology, Vol. 47, No. 1, January 1951.
Hall, Wayne Everett & E.M. Mackevett (1958), Economic geology of the Darwin quadrangle, Inyo County, California: Calif Division of Mines Special Report 51, p: 64
Hall, Wayne Everett & Edward M. Mackevett (1963), Geology and ore deposits of the Darwin quadrangle, Inyo County, California: USGS Professional Paper 368: 59, 76, 77.
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume 1866-1966: California Division Mines & Geology Bulletin 189: 106, 107.
Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 102 (map 3-6), 125-126, 234, 333.
Stolburg, C. S. (1984) “The Mines and Minerals of Darwin, California;" The Mineralogical Record: 15(1): 5-18.
Randol Mining Directory (1990).
Dunning, G.E., Moelo, Yves, Roberts, A.c., & Cooper, J. F. (2000), Ag-Cu-Pb-Bi Sulfosalts New To Darwin, Inyo County, California. Occasional Web Publication of the Bay Area Mineralogists.
Cooper; Fen and Dunning, Gail (2003) : Occasional Publication of the Bay Area Mineralogists, February, 2003
Margerum, W. (2004) The Darwin Tungsten Area Part II: Mines and Mineralogy in the Bulletin of the Mineralogical Society of Southern California Vol. 74(5).
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID # 10139200.
U.S. Bureau of Mines, Minerals Availability System (MAS) file ID # 0060270030.
Wilson L. Kenneth (1943), Tungsten deposits of the Darwin Hills Inyo County, California Economic Geology: 38: 543-560.
Butner, D.W. (1949), Investigation of tungsten occurrences in Darwin district, Inyo County, California: U.S. Bureau of Mines Report of Investigation 4475.
Norman, L.A., and Stewart, R.A. (1951), Mines and Mineral Resources of Inyo County, California, California Division of Mines and Geology, Vol. 47, No. 1, January 1951.
Hall, Wayne Everett & E.M. Mackevett (1958), Economic geology of the Darwin quadrangle, Inyo County, California: Calif Division of Mines Special Report 51, p: 64
Hall, Wayne Everett & Edward M. Mackevett (1963), Geology and ore deposits of the Darwin quadrangle, Inyo County, California: USGS Professional Paper 368: 59, 76, 77.
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume 1866-1966: California Division Mines & Geology Bulletin 189: 106, 107.
Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 102 (map 3-6), 125-126, 234, 333.
Stolburg, C. S. (1984) “The Mines and Minerals of Darwin, California;" The Mineralogical Record: 15(1): 5-18.
Randol Mining Directory (1990).
Dunning, G.E., Moelo, Yves, Roberts, A.c., & Cooper, J. F. (2000), Ag-Cu-Pb-Bi Sulfosalts New To Darwin, Inyo County, California. Occasional Web Publication of the Bay Area Mineralogists.
Cooper; Fen and Dunning, Gail (2003) : Occasional Publication of the Bay Area Mineralogists, February, 2003
Margerum, W. (2004) The Darwin Tungsten Area Part II: Mines and Mineralogy in the Bulletin of the Mineralogical Society of Southern California Vol. 74(5).
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID # 10139200.
U.S. Bureau of Mines, Minerals Availability System (MAS) file ID # 0060270030.
External Links
http://www.mineralsocal.org/bulletin/2004/2004_may.htm (Mineralogy)
http://www.baymin.org/Field/Darwin/Localities.html (Mineralogy)
http://www.baymin.org/Field/Darwin/Localities.html (Mineralogy)
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