Mine detail: Contention Mine

Previously called 'Patented Claims: Contention, MS 4694Mayflower, MS 9792'

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Location

Lat / long:

37.98612, -107.29369

Resource(M)

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

Production

Operation type:	Unknown
Deposit type:	Vein
Production size:	Small
Development status:	Past Producer

Geology

Host type:	Quartz Latite
Associated rock:	Biotite-Quartz Latite Of Burns Member Of Silverton Volcanics
Associated type:	Quartz Latite
Structure:	San Juan Volcanic Field, San Juan Depression, San Juan-Uncompahgre Calderas, Lake City Caldera
Tectonic:	Central Cordillera (Southern Rocky Mtns)
Alteration processes:	Silicification; Supergene Oxidation Of Argentiferous Cu Sulfide To Chalcocite And Native Ag; Sericitization

References

MRDS	D011555
DEP	10014676
Reference	{Deposit:: IRVING, J.D., AND BANCROFT, HOWLAND, 1911, GEOLOGY AND ORE DEPOSITS NEAR LAKE CITY, COLORADO: USGS BULL. 478, P. 102-104.}{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. REPT.}{Deposit:: BLM MINERAL SURVEYS MS 4694, 9792}{Deposit:: BOEHMER, MAX, 1890, REPORT ON THE ADJOINING EMERALD ISLE AND CONTENTION CLAIMS: COLORADO STATE PLANNING COMM. UNPUB. REPT., 3 P.}{Production:: IRVING AND BANCROFT, 1911, P. 102.}
Reporter	Schwochow, Stephen D.