| Deposit ID | 10012346 |
|---|---|
| MRDS ID | D007925 |
| Record type | Site |
| Current site name | Twenty-Six Shafts |
| Alternate or previous names | Twenty-six-Polonia vein |
| Geographic coordinates: | -105.33335, 38.11251 (WGS84) |
|---|---|
| Elevation | 2804 |
| Relative position | 1.05 MILES N15E FROM ROSITA CO. |
Political divisions (FIPS codes)
Custer(county)
Colorado(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Rosita(quadrangle 1:24,000 scale)
Canon City(quadrangle 1:100,000 scale)
Pueblo(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Arkansas Headwaters(hydrologic unit)
Upper Arkansas(hydrologic accounting unit)
Upper Arkansas(hydrologic subregion)
Arkansas-White-Red(hydrologic region)
Federal lands
Bureau of Land Management(Bureau of Land Management CO)
Bureau of Land Management CO BLM(Type of land area)
BLM(Federal land areas administered by BLM)
| Country | State | County |
|---|---|---|
| United States | Colorado | Custer |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| 6th Principal | 022S | 071W | 28 | NE OF NE OF NW | Colorado |
| Commodity | Importance |
|---|---|
| Silver | Primary |
| Lead | Secondary |
| Copper | Secondary |
| Materials | Type of material |
|---|---|
| Argentite | Ore |
| Chalcopyrite | Ore |
| Galena | Ore |
| Barite | Gangue |
| Calcite | Gangue |
| Pyrite | Gangue |
| Result | HIGH GRADE ORE 200-300 OZ/TON AG |
|---|
| Model code | 82 |
|---|---|
| USGS model code | 22 |
| Deposit model name | Epithermal veins |
| Host or associated | Host |
|---|---|
| Rock type | Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite |
| Rock unit name | Rosita Andesite;Game Ridge Trachyte |
| Rock description | Rosita Andesite;Game Ridge Trachyte |
| Host or associated | Host |
|---|---|
| Rock type | Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Trachyte |
| Host or associated | Host |
|---|---|
| Rock type | Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite |
| Rock unit name | Granite Boulders Included In Breccia |
| Rock description | Granite Boulders Included In Breccia |
| (1) | -105.33335, 38.11251 |
|---|
| Type of structure | Regional |
|---|---|
| Structure description | Rosita Volcanic Center, Wet Mtns |
| Type of structure | Local |
| Structure description | Twenty-Six Fault, Striking East-West |
| Strike | EAST-WEST |
|---|---|
| Dip | NEARLY VERTICAL |
| Depth to top | 0M |
| Depth to bottom | 56.39M |
| Operation type | Underground |
|---|---|
| Development status | Past Producer |
| Commodity type | Metallic |
| Deposit size | Small |
| Significant | No |
| Discovery year | 1895 |
| District name | Rosita Hills District |
|---|
| Ownership category | Private |
|---|
| Type of workings | Unknown |
|---|---|
| Length | 96.01M |
| Overall depth | 56.39M |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | D007925 |
CROSS, WHITMAN, 1896, GEOLOGY OF SILVER CLIFF AND THE ROSITA HILLS, COLORADO: USGS 17TH ANN. REPORT, PT 2, P. 263-403
EMMONS, S.F., 1896, THE MINES OF CUSTER COUNTY, COLORADO: USGS 17TH ANN. REPORT, PT 2, P. 405-472.
SHARP, W.M., 1978, GEOLOGIC MAP OF THE SILVER CLIFF AND ROSITA VOLCANIC CENTERS, CUSTER COUNTY, COLORADO: USGS MAP I-1081.
Sunshine Mining Co. Colorado exploration files, unpublished data, Colorado Geological Survey.
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-JUN-81 | Collins, Donna B. | Colorado Geological Survey | |
| Updater | 05-APR-06 | Beach, Richard A. | Colorado Geological Survey |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.
These are landing pages for further research — the state agencies don't currently expose per-mine deep links.