| Deposit ID | 10013735 |
|---|---|
| MRDS ID | D010193 |
| Record type | Site |
| Current site name | East Shaffer Hill Pegmatite |
| Related records | 10239611 |
| Geographic coordinates: | -105.38252, 39.71249 (WGS84) |
|---|---|
| Elevation | 2316 |
| Location accuracy | 500(meters) |
| Relative position | 8 MILES S 65 W FROM GOLDEN |
Political divisions (FIPS codes)
Jefferson(county)
Colorado(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Saddleback Mountain(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 | 07 | SW | Colorado |
| Commodity | Importance |
|---|---|
| Feldspar | Primary |
| Tantalum Critical | Tertiary |
| Copper | Tertiary |
| REE Critical | Tertiary |
| Materials | Type of material |
|---|---|
| Cleavelandite | Ore |
| Malachite | Ore |
| Microcline | Ore |
| Microlite | Ore |
| Garnet | Gangue |
| Magnetite | Gangue |
| Monazite | Gangue |
| Quartz | 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---Hornblende Gneiss And Amphibolite |
| Rock description | Idaho Springs Formation---Hornblende Gneiss And Amphibolite |
| (1) | -105.38252, 39.71249 |
|---|
| Type of structure | Regional |
|---|---|
| Structure description | Front Range Uplift, Denver Basin |
| Type of structure | Local |
| Structure description | Floyd Hill Fault Zone |
| General form | TABULAR |
|---|---|
| Thickness | 6.1M |
| Length | 243.84M |
| Development status | Past Producer |
|---|---|
| Commodity type | Both |
| Deposit size | Small |
| Significant | No |
| Discovery year | 1938 |
| Year of first production | 1945 |
| District name | Clear Creek Pegmatite Province |
|---|
| Ownership category | Private |
|---|
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | D010193 | |
| U.S. Bureau of Mines | Minerals Availability System | MAS | 0080590073 |
SHERIDAN, D.M., AND MARSH, S.P., 1976, GEOLOGIC MAP OF THE SQUAW PASS QUADRANGLE, CLEAR CREEK, JEFFERSON, AND GILPIN COUNTIES, COLORADO: USGS MAP GQ-1337
MEEVES, H.C., AND OTHERS, 1966, RECONNAISSANCE OF BERYLLIUM-BEARING PEGMATITES DEPOSITS IN SIX WESTERN STATES: USBM IC-8298, P. 28.
| Subject category | Comment text |
|---|---|
| Deposit | ZONED PEGMATITES TREND N 70 TO 90 E AND CONTAIN CORE OF K-FELDSPAR, ROSE TO WHITE OR BLUISH QUARTZ; WALL ZONE OF PATCHY GRAPHIC AND K-FELDSPAR. MICROLITE AND MALACHITE STAINS ON FELDSPAR. |
| 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.
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