| Deposit ID | 10013729 |
|---|---|
| MRDS ID | D010186 |
| MAS/MILS ID | 0080590212 |
| Record type | Site |
| Current site name | Roscoe Beryl Prospect |
| Alternate or previous names | Roscoe Beryl, Roscoe Prospect |
| Geographic coordinates: | -105.35808, 39.73721 (WGS84) |
|---|---|
| Elevation | 2057 |
| Location accuracy | 100(meters) |
| Relative position | 6 MILES S 75 W FROM GOLDEN, Within 100 m radius |
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 | 004S | 071W | 05 | NW of NE | Colorado |
| 6th Principal | 003S | 071W | 33 | SW | Colorado |
| Commodity | Importance |
|---|---|
| Feldspar | Primary |
| Mica | Primary |
| Beryllium Critical | Tertiary |
| REE Critical | Tertiary |
| Quartz | Secondary |
| Materials | Type of material |
|---|---|
| Beryl | Ore |
| Gadolinite | Ore |
| Monazite | Ore |
| Muscovite | Ore |
| Xenotime | Ore |
| Biotite | Gangue |
| Magnetite | 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 | Idaho Springs Formation---Interlayered Feldspar-Rich Gneiss, Hornblende Gneiss And Amphibolite, And Biotite Gneiss |
| Rock description | Idaho Springs Formation---Interlayered Feldspar-Rich Gneiss, Hornblende Gneiss And Amphibolite, And Biotite Gneiss |
| (1) | -105.35808, 39.73721 |
|---|
| Type of structure | Regional |
|---|---|
| Structure description | Front Range Uplift, Denver Basin |
| Type of structure | Local |
| Structure description | Blackhawk Fault |
| General form | TABULAR |
|---|---|
| Thickness | 6.1M |
| Length | 30.48M |
| 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 | D010186 | |
| U.S. Bureau of Mines | Minerals Availability System | MAS | 0080590212 | |
| U.S. Bureau of Mines | Minerals Availability System | MAS | 0080590232 | from deleted MRDS record 10142525 |
SHERIDAN, D.M., AND OTHERS, 1972, GEOLOGIC MAP OF THE EVERGREEN QUADRANGLE, JEFFERSON COUNTY, COLORADO: USGS MAP I-786-A.
OLSON, J.C., AND ADAMS, J.W., 1962, THORIUM AND RARE EARTHS IN THE UNITED STATES: USGS MAP MR-28.
MEEVES, H.C., AND OTHERS, 1966, RECONNAISSANCE OF BERYLLIUM-BEARING PEGMATITE DEPOSITS IN SIX WESTERN STATES: USBM IC-8298, P. 28, no. 69.
USGS COMMODITY FILE: GR III, REEL 31, DOC. 9937, 1945; GR III, REEL 32, DOC. 100051, 1943; GR III, REEL 40, DOC. 12737, 1943; GR II, REEL 12, DOC. 2701, 1946 (FROM ORIGINAL CRIB RECORD)
| Subject category | Comment text |
|---|---|
| Deposit | PEGMATITE STRIKES N 83 E, DIPS 75 SE AND CROSSES GENERALLY WNW-TRENDING COUNTRY ROCK FOLIATION |
| Deposit | A.B. Wilson combined info from records 10142525 and 10215355 and deleted those two records. |
| Deposit | Information added to this record from former record 10142525 includes: adding Quartz as a commodity, noting that the latitude/longitude location is supposedly within 10 m of the main pit at 39-44-15-N, -105-21-27-W, PLSS is 3S, 71W, 33, SW, Land status is Federal, Ore body type is pegmatite and primary mode of origin is magmatic differentialtion. |
| Deposit | Record 10215355 was a very poor and incomplete record with no references cited. |
| Deposit | Deleted record 10142525 listed old MRDS record D010205 as a predecessor. This record was not found. |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-FEB-83 | Schwochow, Stephen D. | Colorado Geological Survey | |
| Editor | 18-JUL-08 | Wilson, Anna B. | U.S. Geological Survey | |
| Reporter | 30-DEC-91 | Martin | U.S. Bureau of Mines | |
| Reporter | 13-FEB-78 | Intermountain Field Operations Center (IFOC) | U.S. Bureau of Mines |
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.