| Deposit ID | 10094570 |
|---|---|
| MRDS ID | D009431 |
| Record type | Site |
| Current site name | Dubuque Tunnel |
| Geographic coordinates: | -106.83451, 39.1536 (WGS84) |
|---|---|
| Elevation | 2865 |
| Relative position | 2.5 MILES S 20 W FROM ASPEN |
Political divisions (FIPS codes)
Pitkin(county)
Colorado(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Aspen(quadrangle 1:24,000 scale)
Leadville(quadrangle 1:100,000 scale)
Leadville(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Roaring Fork(hydrologic unit)
Colorado Headwaters(hydrologic accounting unit)
Colorado Headwaters(hydrologic subregion)
Upper Colorado(hydrologic region)
Federal lands
White River National Forest(National Forest)
National Forest FS(Type of land area)
FS(Federal land areas administered by FS)
| Country | State | County |
|---|---|---|
| United States | Colorado | Pitkin |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| 6th Principal | 010S | 085W | 25 | NW | Colorado |
| Commodity | Importance |
|---|---|
| Lead | Primary |
| Copper | Primary |
| Materials | Type of material |
|---|---|
| Chalcopyrite | Ore |
| Galena | Ore |
| Barite | Gangue |
| Host or associated | Associated | ||
|---|---|---|---|
| Rock type | Plutonic Rock > Granitoid > Granite | ||
| Rock unit name | Aplite Porphyry;Quartz Monzonite | ||
| Rock description | Aplite Porphyry;Quartz Monzonite | ||
| |||
| Host or associated | Host |
|---|---|
| Rock type | Sedimentary Rock > Carbonate > Limestone |
| Rock unit name | Leadville Limestone (Castle Butte Member);Belden, Maroon, And Gothic Formations |
| Rock description | Leadville Limestone (Castle Butte Mbr);Belden, Maroon, And Gothic Formations |
| (1) | -106.83451, 39.1536 |
|---|
| Type of structure | Regional |
|---|---|
| Structure description | Sawatch Uplift, Central Colorado Trough, Piceance Basin, White River Uplift, Elk Uplift |
| Type of structure | Local |
| Structure description | Castle Creek Fault Zone, Annie Fault, Dubuque Fault, Butte Fault, Silver Fault |
| Development status | Occurrence |
|---|---|
| Commodity type | Metallic |
| Deposit size | Small |
| Significant | No |
| District name | Aspen (Roaring Fork) District |
|---|
| Ownership category | Private |
|---|
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | D009431 |
SPURR, J.E., 1898, GEOLOGY OF THE ASPEN DISTRICT, COLORADO: USGS MON. 31, P. 204, PL. 43
BRYANT, BRUCE, 1971, GEOLOGIC MAP OF THE ASPEN QUADRANGLE, PITKIN COUNTY, COLORADO: USGS MAP GQ-933
BRYANT, BRUCE, 1972, MAP SHOWING MINES, PROSPECTS, AND AREAS OF SIGNIFICANT SILVER, LEAD, AND ZINC PRODUCTION IN THE ASPEN QUADRANGLE, PITKIN COUNTY, COLORADO: USGS MAP I-785-D
| Subject category | Comment text |
|---|---|
| Deposit | TUNNEL DRIVEN EAST INTO EAST MARGIN OF CASTLE CREEK FAULT ZONE, PASSING THRU MAROON AND BELDEN FMS AND ENCOUNTERING CRUSHED ZONE OF SHALE AND PORPHYRY IN HANGING WALL OF APLITE PORPHYRY SILL. BELDEN FM FOUND ON OTHER (EAST) SIDE OF SILL, FOLLOWED BY SILICIFIED LIMESTONE (CASTLE BUTTE MBR) IN FAULT CONTACT (CASTLE CREEK FAULT) WITH PRECAMBRIAN QUARTZ MONZONITE. SILL APPEARS TO BE BOUNDED BY FAULTS ON BOTH SIDES, ON WEST BY ANNIE FAULT AND ON EAST BY DUBUQUE FAULT. BEDDING AND FAULTS DIP VERTICAL TO STEEPLY WEST. MAIN ORE FOUND IN SILICIFIED LIMESTONE NEXT TO QUARTZ MONZONITE. LOWER GRADE ORE FOUND AT FAULT CONTACT BETWEEN BELDEN AND MAROON FMS AND FARTHER WEST IN MAROON LIMESTONE. |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-SEP-1982 | Schwochow, Stephen D. | Colorado Geological Survey |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.
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