Mine detail: Blackjack Group

Location:	Chaffee County, Colorado, United States, North America
Lat / long:	38.6175, -105.9467
dep_id:	10013944
mrds_id:	D010516
Commodity type:	metallic
Major mineral:	Manganese
Minor mineral:	Iron
Operation type:	Unknown
Production size:	No production occurred
Development status:	Occurrence
ore:	Limonite, Pyrolusite, Siderite
alteration:	Oxidation
ore_ctrl:	Stratigraphically Above Main Sill Of Granodiorite; Fractures
Reporter:	Collins, Donna B.
hrock_unit:	Leadville Limestone
hrock_type:	Limestone
arock_unit:	Granodiorite (Calumet Granodiorite)
arock_type:	Diorite
Structure:	Southern Mosquito Range, N-S-Trending Fault, Pleasant Valley Syncline
tectonic:	Central Cordillera (Southern Rocky Mountains)
dy_ba:	<
disc_yr:	1933
References:	Deposit:: OSBORN, E.F. AND RAINWATER, E.H., 1934, GEOLOGY OF THE CALUMET, COL ORADO MINING DISTRICT: ILLINOIS NORTHWESTERN UNIVERSITY UNPUBLISHED MA STER OF ARTS THESIS, P. 132-133 Deposit:: SCOTT, G.R., TAYLOR, R.B., EPIS, R.C. AND WOBUS, R.A., 1978, GEOLOG IC MAP OF THE PUEBLO 10 X 20 QUADRANGLE, SOUTH-CENTRAL COLORADO: USGS MAP I-1022 1:250,000 Deposit:: BEHRE, C.H., JR., OSBORN, E.F., RAINWATER, E.H., 1936, CONTACT ORE DEPOSITION AT THE CALUMET IRON MINE, COLORADO: ECONOMIC GEOLOGY, V. 31 , NO. 8, P. 804.