| Deposit ID | 10013728 |
|---|---|
| MRDS ID | D010185 |
| MAS/MILS ID | 0080590163 |
| Record type | Site |
| Current site name | Roscoe Gulch Pegmatites |
| Alternate or previous names | Roscoe Gulch Pegmatite |
| Point of reference | Trench |
|---|---|
| Geographic coordinates: | -105.37336, 39.74721 (WGS84) |
| Elevation | 2274 |
| Location accuracy | 500(meters) |
| Relative position | 7.9 MILES S 84 W FROM GOLDEN |
Political divisions (FIPS codes)
Jefferson(county)
Colorado(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Evergreen(quadrangle 1:24,000 scale)
Denver West(quadrangle 1:100,000 scale)
Denver(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Clear(hydrologic unit)
South Platte(hydrologic accounting unit)
South Platte(hydrologic subregion)
Missouri(hydrologic region)
| Country | State | County |
|---|---|---|
| United States | Colorado | Jefferson |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| 6th Principal | 003S | 071W | 31 | C of E2 | Colorado |
| Commodity | Importance |
|---|---|
| Feldspar | Primary |
| Mica | Primary |
| Beryllium Critical | Primary |
| REE Critical | Secondary |
| Materials | Type of material |
|---|---|
| Allanite | Ore |
| Beryl | Ore |
| Microcline | Ore |
| Monazite | Ore |
| Muscovite | Ore |
| Garnet | Gangue |
| Magnetite | Gangue |
| Tourmaline | Gangue |
| Host or associated | Associated | ||||||
|---|---|---|---|---|---|---|---|
| Rock type | Plutonic Rock > Pegmatite | ||||||
| Rock unit name | Pegmatite | ||||||
| Rock description | Pegmatite | ||||||
| |||||||
| Host or associated | Host |
|---|---|
| Rock type | Metamorphic Rock > Gneiss |
| Rock unit name | Pegmatite;Idaho Springs Formation---Interlayered Feldspar-Rich Gneiss, Hornblende Gneiss, Amphibolite, Biotite Gneiss |
| Rock description | Pegmatite;Idaho Springs Formation---Interlayered Feldspar-Rich Gneiss, Hornblende Gneiss, Amphibolite, Biotite Gneiss |
| Trench (1) | -105.37336, 39.74721 |
|---|
| Type of structure | Regional |
|---|---|
| Structure description | Front Range Uplift, Denver Basin |
| Type of structure | Local |
| Structure description | Blackhawk Fault, Unnamed Syncline |
| Operation type | Surface |
|---|---|
| Development status | Past Producer |
| Commodity type | Both |
| Deposit size | Small |
| Significant | No |
| District name | Clear Creek Pegmatite Province |
|---|
| Ownership category | Private |
|---|
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | D010185 | |
| U.S. Bureau of Mines | Minerals Availability System | MAS | 0080590163 |
SHERIDAN, D.M., AND OTHERS, 1972, GEOLOGIC MAP OF THE EVERGREEN QUADRANGLE, JEFFERSON COUNTY, COLORADO: USGS MAP I-786-A
MEEVES, H.C., AND OTHERS, 1966, RECONNAISSANCE OF BERYLLIUM-BEARING PEGMATITE DEPOSITS IN SIX WESTERN STATES: USBM IC-8298, P. 28
USBM MIN. EXAM. FILE, REPT. OF 6/1/59 (FROM ORIGINAL CRIB RECORD)
| Subject category | Comment text |
|---|---|
| Deposit | TEN UNZONED PEGMATITES IN LIME-SILICATE GNEISS |
| Deposit | Cobined ifno from 10166922 (derived from MAS 0080590163) and deleted that duplicate record. No references/citations were given. |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-FEB-83 | Schwochow, Stephen D. | Colorado Geological Survey | |
| Reporter | 21-SEP-78 | Intermountain Field Operations Center (IFOC) | U.S. Bureau of Mines | |
| Editor | 18-JUL-08 | Wilson, Anna B. | U.S. Geological Survey |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.
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