| Deposit ID | 10013737 |
|---|---|
| MRDS ID | D010196 |
| Record type | Site |
| Current site name | Silver Glen Ranch Pegmatite |
| Related records | 10239514 |
| Geographic coordinates: | -105.30308, 39.66666 (WGS84) |
|---|---|
| Elevation | 2176 |
| Relative position | 7 MILES S 25 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)
Upper South Platte(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 | 26 | SW OF SE | Colorado |
| Commodity | Importance |
|---|---|
| Feldspar | Primary |
| Mica | Primary |
| Beryllium Critical | Secondary |
| Niobium (Columbium) Critical | Secondary |
| Tantalum Critical | Secondary |
| Thorium | Tertiary |
| REE Critical | Tertiary |
| Materials | Type of material |
|---|---|
| Bertrandite | Ore |
| Beryl | Ore |
| Cleavelandite | Ore |
| Columbite | Ore |
| Microcline | Ore |
| Microlite | Ore |
| Monazite | Ore |
| Thorite | Ore |
| Garnet | Gangue |
| Topaz | 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 Hornblende Gneiss, Calc-Silicate Gneiss, And Amphibolite |
| Rock description | Idaho Springs Formation---Interlayered Hornblende Gneiss, Calc-Silicate Gneiss, And Amphibolite |
| (1) | -105.30308, 39.66666 |
|---|
| Type of structure | Regional |
|---|---|
| Structure description | Front Range Uplift, Denver Basin |
| Type of structure | Local |
| Structure description | Floyd Hill Fault Zone, Unnamed Overturned Anticline |
| General form | TABULAR |
|---|---|
| Length | 121.92M |
| Development status | Past Producer |
|---|---|
| Commodity type | Both |
| Deposit size | Small |
| Significant | No |
| Year of first production | 1945 |
| Year of last production | 1956 |
| District name | Clear Creek Pegmatite Province |
|---|
| Ownership category | Private |
|---|
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | D010196 | |
| U.S. Bureau of Mines | Minerals Availability System | MAS | 0080590170 |
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. 29.
USBM MIN. EXAM. FILE, REPT. OF 6/1/59 (FROM ORIGINAL CRIB RECORD)
ORIGINAL CRIB RECORD (PROBABLY USBM REFERENCE)
| Subject category | Comment text |
|---|---|
| Deposit | WELL-ZONED PEGMATITE HAS WALL ZONE OF DULL PLAGIOCLASE AND MICROCLINE WITH FESTOONED HERRINGBONE MICA FANNING INTO QUARTZ CORE |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-FEB-1983 | Schwochow, Stephen D. | 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.