Commodities
PrimarySilver, Iron
TertiaryREE, Molybdenum, Copper
Commodity typeM
Deposit
Model79: Porphyry Cu-Mo82: Epithermal veins
Deposit sizeS
WorkingsUnderground
Orebody formDIKE
Ore controlFault, Volcanic Vent, Breccia Dike
Materials
Ore mineralsSphalerite, Apatite, Brochantite, Goethite, Hematite, Jarosite, Magnetite, Molybdenite, Powellite, Pyrite, Siderite, Tennantite
GangueActinolite, Barite, Calcite, Chalcedony, Chlorite, Diopside, Phlogopite, Quartz, Ankerite
Geology
Host rockTrachyandesite,Andesite
Associated rockTrachyandesite,Andesite · Bunker Trachyandesite
StructureRosita Volcanic Center, Wet Mtns, Several Small Faults, Ring Faults
Tectonic settingCentral Cordillera (Southern Rocky Mtns)
AlterationWeak Argillization, Hydrothermal Alteration With Silicification
Economic & production
Development statusPast Producer
First production1880
Last production1889
Discovery year1879
Identification
Deposit ID10012295
MRDS IDD007848
Alternate namesIron Hill Mine, Iron Mine
RegionNA
Data scoreB
Coordinates38.11807, -105.37307
References
CROSS, WHITMAN, 1896, GEOLOGY OF SILVER CLIFF AND THE ROSITA HILLS, COLORADO: USGS 17TH ANN. REPORT, PT. 2, P. 263-403.SHARP, W.M., 1978, GEOLOGIC MAP OF THE SILVER CLIFF AND ROSITA VOLCANIC CENTERS, CUSTER COUNTY, COLORADO: USGS MAP I-1081.HILDEBRAND, F.A. AND CONKLIN, N.M., 1974, A BRECCIA DIKE CONTAINING RARE-EARTH-BEARING APATITE, MOLYBDENITE, AND MAGNETITE AT IRON HILL, CUSTER COUNTY, COLORADO: ECONOMIC GEOLOGY, V. 69, P. 508-515.KING, R.U., UNPUBLISHED DATA.Sunshine Mining Co. Colorado exploration files, unpublished data, Colorado Geological Survey.