Mine detail: Rico-Aspen Mine

Previously called 'Aspen, MS 6512Last Chance, MS 6512Brittle Silver, MS 7458Silver Glance, MS 6201Silver Glance No. 2, MS 6201Snow Flake, MS 6216Vestal, MS 6252Syndicate TunnelPatented Claims: Telegraph, MS 780Syndicate, MS 2185aStar, MS 6199Selenide, MS 7458Silver Glance No. 4, MS 7976Stephanite, MS 7980'

Location:	Dolores County, Colorado, United States, North America
Lat / long:	37.67918, -108.02926
dep_id:	10014138
mrds_id:	D010785
Commodity type:	metallic
Major mineral:	Silver, Lead, Zinc
Minor mineral:	Copper, Gold
Trace mineral:	Bismuth
Operation type:	Unknown
Production size:	Small ammount of material produced
Development status:	Past Producer
ore:	Argentite, Chalcopyrite, Pyrite, Sphalerite
gangue:	Calcite, Dolomite, Quartz, Siderite
orebody_fm:	TABULAR
model:	72: Polymetallic replacement
ore_ctrl:	Limestone And Dissolution Gypsum Breccia Below Impermeable Shale Above Ne-Trending Vertical Fissures
Reporter:	Schwochow, Stephen D.
hrock_unit:	Hermosa Formation
hrock_type:	Shale,Limestone,Evaporite
arock_unit:	Hornblende Latite Porphyry
arock_type:	Latite
Structure:	San Juan Uplift, Paradox Basin, Rico Dome
tectonic:	Central Cordillera (Southern Rocky Mtns)
yr_lst_prd:	1939
References:	Deposit:: MCKNIGHT, E.T., 1974, GEOLOGY AND ORE DEPOSITS OF THE RICO DISTRICT, COLORADO: USGS PROF. PAPER 723, P. 73-75. Deposit:: PRATT, W.P., AND OTHERS, 1969, GEOLOGIC MAP OF THE RICO QUADRANGLE, DOLORES AND MONTEZUMA COUNTIES, COLORADO: USGS MAP GQ-797. Deposit:: RANSOME, F.L., THE ORE DEPOSITS OF THE RICO MOUNTAINS, COLORADO: USGS 22D ANN. REPT., PT. 2, P. 335-340. Deposit:: CROSS, WHITMAN, AND RANSOME, F.L., 1905, DESCRIPTION OF THE RICO QUADRANGLE: USGS FOLIO 130. Deposit:: COLORADO DIV. MINES INF. REPTS. AND ANNUAL OPERATOR REPTS. Deposit:: BLM MINERAL SURVEYS MS 780, 2185A, 6199, 6201, 6216, 6252, 7458, 7459, 7976, 7980 Deposit:: BASTIN, E.S., 1922, SILVER ENRICHMENT IN THE SAN JUAN MOUNTAINS, COLORADO: USGS BULL. 735-D, P. 114-115. Production:: COLORADO DIV. MINES ANNUAL OPERATOR REPTS.