| Deposit ID | 10013758 |
|---|---|
| MRDS ID | D010221 |
| Record type | Site |
| Current site name | Bell Group |
| Geographic coordinates: | -105.33569, 40.03139 (WGS84) |
|---|---|
| Elevation | 1951 |
| Location accuracy | 1000(meters) |
| Relative position | 4.0 MILES N 61 W FROM BOULDER |
Political divisions (FIPS codes)
Boulder(county)
Colorado(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Boulder(quadrangle 1:24,000 scale)
Estes Park(quadrangle 1:100,000 scale)
Greeley(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
St. Vrain(hydrologic unit)
South Platte(hydrologic accounting unit)
South Platte(hydrologic subregion)
Missouri(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 | Boulder |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| 6th Principal | 001N | 071W | 22 | Colorado |
| Commodity | Importance |
|---|---|
| Gold | Primary |
| Silver | Primary |
| Uranium | Tertiary |
| Result | SAMPLES RANGE FROM 0.0006 TO 0.041% U3O8 |
|---|
| Host or associated | Associated | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Rock type | Plutonic Rock > Mafic Intrusive Rock > Diorite | ||||||||
| Rock unit name | Boulder Creek Granodiorite | ||||||||
| Rock description | Boulder Creek Granodiorite | ||||||||
| |||||||||
| Host or associated | Host |
|---|---|
| Rock type | Plutonic Rock > Mafic Intrusive Rock > Diorite |
| Rock unit name | Boulder Creek Granodiorite |
| Rock description | Boulder Creek Granodiorite |
| (1) | -105.33569, 40.03139 |
|---|
| Type of structure | Regional |
|---|---|
| Structure description | Front Range Uplift, Boulder Creek Batholith |
| Type of structure | Local |
| Structure description | Poorman Fault Zone, Maxwell Fault Zone (Breccia Reef) |
| Development status | Past Producer |
|---|---|
| Commodity type | Metallic |
| Deposit size | Small |
| Significant | No |
| District name | Gold Hill District |
|---|
| Ownership category | Private |
|---|
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | D010221 |
LOVERING, T.S., AND GODDARD, E.N., 1950, GEOLOGY AND ORE DEPOSITS OF THE FRONT RANGE, COLORADO: USGS PROF. PAPER 223, P. 234-246
COLTON, R.B., 1978, GEOLOGIC MAP OF THE BOULDER-FORT COLLINS-GREELEY AREA, COLORADO: USGS MAP I-855-G
| Subject category | Comment text |
|---|---|
| Deposit | ALTHOUGH BELL GROUP AND ADJACENT POORMAN GROUP ARE ISOLATED SE OF MAIN PART OF DISTRICT, PRODUCTIVE AU-AG TELLURIDE VEINS WERE FORMED IN STRUCTURALLY FAVORABLE FISSURES ON SW SIDE OF INTERSECTION OF POORMAN REEF (TRENDING GENERALLY N 80 TO 85 W) AND PROMINENT LARAMIDE MAXWELL REEF (TRENDING N 25 W). |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-FEB-1983 | Banke, Carl M. | Colorado Geological Survey |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.
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