Mine detail: Black Diamond Mine

Previously called ''

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Location

Lat / long:

37.4364, -108.05704

Resource(M)

Primary:	Gold, Silver
Tertiary:	Copper, Lead, Tellurium
Ore:	Chalcopyrite, Galena
Gangue:	Barite, Chalcedony, Garnet, Hematite, Magnetite, Quartz
Discovery year:	1895

Production

Operation type:	Unknown
Deposit type:	Vein
Production size:	Small
Development status:	Past Producer
First production started:	1900
Last production ended:	1939

Geology

Host rock:	Cutler Formation;Dolores Formation
Host type:	Mudstone,Shale,Sandstone,Conglomerate
Associated rock:	Porphyritic Rocks--Diorite-Monzonite Porphyry;Nonporphyritic Rocks--Diorite
Associated type:	Diorite
Structure:	San Juan Uplift, Four Corners Platform, La Plata Dome, Diorite Peak Stock
Tectonic:	Central Cordillera (Southern Rocky Mtns)
Alteration processes:	Silicification, Kaolinitization, Chloritization

References

MRDS	D010804
DEP	10101870
Reference	{Deposit:: ECKEL, E.B., AND OTHERS, 1949, GEOLOGY AND ORE DEPOSITS OF THE LA PLATA DISTRICT, COLORADO: USGS PROF. PAPER 219, P. 69-70, 93-96, 171.}{Deposit:: BECKER, C.M., 1934, REPORT ON THE TOMAHAWK AND BLACK DIAMOND PROPERTIES, SAN JUAN DISTRICT, LA PLATA COUNTY, COLORADO: UNPUB. ENG. REPT., 5P.}{Deposit:: MCCAUSLAND, ROSS, 1936, TOMAHAWK-BLACK DIAMOND MINES, DURANGO, COLORADO: UNPUB. ENG. REPT., 22 P.}{Deposit:: COLORADO DIV. MINES INF. REPT.}{Production:: ECKEL AND OTHERS, 1949, P. 94 (AS COMPLIED FROM USBM RECORDS).}
Reporter	Schwochow, Stephen D.