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Hinch Mine (Hinch and Clary deposit), Carmen City, Foothill Copper Belt, Calaveras Co., California, USA
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Latitude: 38°3'2"N
Longitude: 120°38'43"W
 
 
A former Cr mine located in the SW¼ sec. 3 & in sec. 10, T2N, R12E, MDM, 4.0 km (2.5 miles) E of Carmen City (AT S END OF A RIDGE 1/4 MI. N OF POOLES STATION), on private land. Discovered and first operated in 1905 and during World War I. Property consisted of 5 claims. Owned by John R. Leimbach (100%), California (1976). Operated by F.W. Dean and Fred Wilson (last operators) during WWI, California (1976). MRDS database stated accuracy for this location is 10 meters.

The ore body strikes N30W and dips vertically at a thickness of 10 meters, width of 15 meters and a length of 45 meters. Ore body No. 1 is disseminated, tabular and ore body No. 2 is irregular. The primary mode of origin was magmatic differentiation. Primary ore control was lithology. Wallrock alteration is intense (carbonitization). Chrome ore occurs as lenses in serpentine. Most of the country rock is sheared, serpentinized saxonite. No ore observed in situ and only scattered fragments are found on the dump, some of which contain small amounts of kammererite. Local rocks include Mesozoic volcanic rocks, unit 2 (Western Sierra Foothills and Western Klamath Mountains).

Workings include surface and underground openings. Developed by open cuts and shafts. 3 open cuts and a shaft are scattered over a distance of 150 feet along a NW-trending line.

Total production was 315 long tons. 15 tons of that total were mined in 1905 for use as furnace linings. The re maining 300 tons were mined during WWI.

Mineral List

Chromite
Clinochlore
var: Chromian Clinochlore

Clinochlore
var: Pennine

Magnesiochromite
'Olivine'
'Pyroxene Group'
'Serpentine Group'


7 entries listed. 1 valid mineral. 1 erroneous literature entry.

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References

Harder, Edmund Cecil (1910), Some chromite deposits n western and central California: USGS Bulletin 430: 176.

Bradley, W.W., et al (1918), Manganese and chromium in California: California Mining Bureau. Bulletin 76: 121-122.

Cater, F.W., Jr. (1948b), Chromite deposits of Calaveras and Amador Counties, California: California Division Mines Bulletin 134, part III, Chapter 2: 47-48, Pl. 5.

Logan, Clarence August (1925), Sacramento field division: California Mining Bureau. (Report 21): 21(2): 165.

Clark, Wm. B. & P.A. Lydon (1962), Mines and mineral resources of Calaveras County, California: California Division of Mines & Geology County Report 2; [… Geological Society of America Proceedings, 1933: 312-313, 1934]: 129, Pl. D.

Stinson, Melvin Clarence (1975) California Division of Mining and Geology Mineral Property Report (unpublished).

Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 155 (map 4-6), 433.

Clark, William B. & Lydon, Philip A. (1963), Mines and Mineral Resources of Calaveras County, California, California Division of Mines and Geology, County Report No. 2: Page 129.

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10028788 & 10187419.

U.S. Bureau of Mines, Minerals Availability System (MAS) file ID #0060090398.

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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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