Mine detail: Black Crook Mine

Previously called 'New Year, MS 12680Ilma MineIlma-Hiwassee GroupPatented Claims: Hiwassee, MS 8651Florence, MS 12345Ilma, MS 11119Altair, MS 11119Precious Metals, MS 11119Palmer, MS 11235Gold King, MS 11591Black Crook, MS 11119'

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Location

Lat / long:

37.98279, -107.30063

Resource(M)

Primary:	Silver, Gold
Secondary:	Lead, Copper
Tertiary:	Zinc, Antimony, Manganese
Ore:	Chalcopyrite, Silver, Sphalerite
Gangue:	Barite, Quartz, Rhodochrosite

Production

Operation type:	Unknown
Production size:	Small
Development status:	Past Producer
Last production ended:	1953

Geology

Host rock:	Local Volcaniclastic Sedimentary Rocks
Host type:	Rhyodacite,Quartz Latite
Associated rock:	Quartz Latite Of Volcanics Of Uncompahgre Peak;Quartz Latite Of Red Mountain;Quartz Latite Of Grassy Mountain
Associated type:	Rhyodacite,Quartz Latite
Structure:	San Juan Volcanic Field, San Juan Depression, San Juan-Uncompahgre Calderas, Lake City Caldera, Black Crook Fault
Tectonic:	Central Cordillera (Southern Rocky Mtns)
Alteration processes:	Oxidation Of Ag-Bearing Cu And Pb Sulfide To Pyrargyrite And Native Ag

References

MRDS	D011554
DEP	10014672
Reference	{Deposit:: IRVING, J.D., AND BANCROFT, HOWLAND, 1911, GEOLOGY AND ORE DEPOSITS NEAR LAKE CITY, COLORADO: USGS BULL. 478, P. 111-116.}{Deposit:: LIPMAN, P.W., 1976, GEOLOGIC MAP OF THE LAKE CITY CALDERA AREA, WESTERN SAN JUAN MOUNTAINS, SOUTHWESTERN COLORADO: USGS MAP I-962.}{Deposit:: LIPMAN, P.W., AND OTHERS, 1976, MULTIPLE AGES OF MID-TERTIARY MINERALIZATION AND ALTERATION IN THE WESTERN SAN JUAN MOUNTAINS, COLORADO: ECON. GEOLOGY, V. 71, NO. 3, P. 571-588.}{Deposit:: SLACK, J.F., 1980, MULTISTAGE VEIN ORES OF THE LAKE CITY DISTRICT, WESTERN SAN JUAN MOUNTAINS, COLORADO: ECON. GEOLOGY, V. 75, NO. 7, P. 963-991.}{Deposit:: COLORADO DIV. MINES INF. REPTS. AND ANNUAL OPERATOR REPTS.}{Deposit:: BLM MINERAL SURVEYS MS 8651, 11119, 11235, 11591, 12345, 12680}{Production:: COLORADO DIV. MINES ANNUAL OPERATOR REPT.; IRVING AND BANCROFT (1911); USBM MINERALS YEARBOOK (1953)}
Reporter	Schwochow, Stephen D.