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Darwin Mines (Darwin group; Defiance; Driver; Independence; Lane; Liberty; Lucky Jim; Southwest and Thompson; Bernon; Rip Van Winkle; Mexicanus Colorado Inc.), Darwin, Darwin District, Darwin Hills, Inyo Co., California, USA

Scheelite
Darwin Mines, Darwin, Darwin District, Darwin Hills, Inyo Co., California, USA
Latitude: 36°16'49"N
Longitude: 117°35'59"W
A group of former Pb-Zn-Ag-W-Cu-Au mines.

NOTE: This group of mines was leased by the firm Mexicanus Colorado Inc. during the early 1970's. The name is mis-spelled in the MRDS database and appears as "Mexicanus Colovgdo Inc A" under MRDS file #10188132, referencing the USGS Minerals Yearbook 1972: 26, 30.

The Company „Project Darwin LLC“ acquired the Darwin Mines and 58 patented mining claims in 1996. They have prepared a good description of these mines and their history and put it on a webpage (see under Links).

Mineralization is a polymetallic replacement deposit (Deposit Model: 72: Polymetallic replacement) hosted in rocks of the Portachuelo Formation (limestone, granodiorite).

Local structures include a thrust fault, igneous intrusions, faults, and folds.

Mineral List

Andradite
Calcite
Cerussite
Chalcopyrite
Chrysocolla
'Clay'
Fluorite
Franckeite
Galena
Guanajuatite
Gypsum
Jarosite
Pyrite
Quartz
var: Jasper
Sphalerite
Tetrahedrite


17 entries listed. 15 valid minerals.

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References

Butner, D.W. (1949), Investigation of tungsten occurrences in Darwin district, Inyo County, California: US Bureau Mines Report of Investigation 4475: 5.

Norman, L.A. & Richard M. Stewart (1951), Mines and mineral resources of Inyo County, California: California Journal of Mines and Geology: 47(1): 59-68.

Goodwin, Joseph Grant (1957) Lead and zinc in California. California Journal of Mines and Geology, Division of Mines: 53(3&4): 466.

Hall, Wayne Everett & E.M. Mackevett (1958), Economic geology of the Darwin quadrangle, Inyo County, California: Calif Division of Mines Special Report 51, 77 pp.: 25-30, 37-40.

U.S. Bureau of Mines Minerals Yearbook (1972): 26, 30.

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10188132.

Mineral Availability System (MAS) file #0060270687 (Darwin District Tungsten).


External Links

http://www.projectdarwin.net/ [Link Broken? Mar 2014] (Status and History of Darwin Mines)

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Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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