| Lat / long: | 37.69279, -108.03065 |
| Primary: | Zinc, Silver, Lead, Copper |
| Secondary: | Sulfur-Pyrite, Gold, Sulfur, Sulfuric Acid, Cadmium |
| Tertiary: | Aluminum, Iron, Manganese |
| Ore: | Alunite |
| Gangue: | Alabandite, Allanite, Allophane, Andalusite, Aragonite, Barite, Calcite, Celestite, Chlorite, Clinozoisite, Cordierite, Diaspore, Dolomite, Epidote, Fluorite, Garnet, Helvite, Huebnerite, Jarosite, Kaolinite, Limonite, Magnetite, Molybdenite, Prehnite, Pyrolusite, Rhodochrosite, Rutile, Sericite, Serpentine, Siderite, Sphene, Tetradymite, Topaz, Tourmaline |
| Operation type: | Unknown |
| Production size: | Small |
| Development status: | Past Producer |
| Associated type: | Monzonite,Hornblendite,Latite,Basalt,Lamprophyre,Granite |
| Structure: | Rico Dome, Calico Peak Anticline; Principal Named Faults: Alaskite, Blackhawk, Futurity, Hidden, Honduras, Knob Hill, Last Chance, Nellie Bly, Princeton, Sandstone Mountain, Silver Creek, Smelter, South Park, Spruce Gulch, 210 Drift, Yellow Jacket |
| Alteration processes: | Oxidation Of Pyrite Replacement To Au-Ag-Bearing Limonitic Iron Ore; Alteration Of Manganiferous Carbonates To Mn Oxides; Alteration Of Base-Metal Sulfides To Carbonates And Sulfates; Alteration Of Ag Minerals (Argentite) To Native Ag And Embolite (Cerargyrite And Bromyrite); Sericitization Of Feldspar In Porphyry And Arkosic Sandstone; Solfataric Alteration To Alunite At Calico Peak. |
| MRDS | D010797 |
| DEP | 10014148 |
| Reference | MCKNIGHT, 1974, P. 6; HENDERSON, 1926, P. 117; USBM MINERAL YEARBOOKS 1969-1981; COLORADO DIVISION OF MINES ANNUAL OPERATOR REPTS. |
| Reporter | Schwochow, Stephen D. |