| Deposit ID | 10013453 |
|---|---|
| MRDS ID | D009748 |
| Record type | Site |
| Current site name | Unnamed Placer Mines |
| Geographic coordinates: | -107.67789, 40.82774 (WGS84) |
|---|---|
| Elevation | 2067 |
| Relative position | 23.1 MILES N 27 E FROM LAY |
Political divisions (FIPS codes)
Moffat(county)
Colorado(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
East Timberlake Creek(quadrangle 1:24,000 scale)
Craig(quadrangle 1:100,000 scale)
Craig(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Little Snake(hydrologic unit)
White-Yampa(hydrologic accounting unit)
White-Yampa(hydrologic subregion)
Upper Colorado(hydrologic region)
| Country | State | County |
|---|---|---|
| United States | Colorado | Moffat |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| 6th Principal | 010N | 092W | 13,14 | W2 OF NW (13); E2 OF E2 (14) | Colorado |
| Commodity | Importance |
|---|---|
| Gold | Primary |
| Materials | Type of material |
|---|---|
| Gold | Ore |
| Host or associated | Host | ||||
|---|---|---|---|---|---|
| Rock type | Unconsolidated Deposit > Sand and Gravel | ||||
| Rock unit name | Unconsolidated Deposits--Alluvium | ||||
| Rock description | Unconsolidated Deposits--Alluvium | ||||
| |||||
| (1) | -107.67789, 40.82774 |
|---|
| Type of structure | Regional |
|---|---|
| Structure description | Washakie Basin |
| Type of structure | Local |
| Structure description | Washakie Basin |
| Development status | Past Producer |
|---|---|
| Commodity type | Metallic |
| Deposit size | Small |
| Significant | No |
| District name | Fourmile (Timberlake Creek) District |
|---|
| Ownership category | Federal |
|---|
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | D009748 |
PARKER, B.H., JR., 1974, THE PLACERS OF MOFFAT COUNTY, IN GOLD PLACERS OF COLORADO: COLORADO SCHOOL OF MINES QUART., V. 69, NO. 4, P. 150-168.
TWETO, OGDEN, 1976, GEOLOGIC MAP OF THE CRAIG 1X2 QUADRANGLE, NORTHWESTERN COLORADO: USGS MAP I-972
SNOW, E.P., 1895, THE FOURMILE PLACER FIELDS OF (MOFFAT COUNTY), COLORADO AND WYOMING: ENG. MINING JOUR., V. 60, P. 102-105
HOOVER, HERBERT C., 1897, GEOLOGY OF THE FOUR-MILE PLACER MINING DISTRICT (MOFFAT COUNTY), COLORADO: ENG. MINING JOUR., V. 63, P. 510.
| Subject category | Comment text |
|---|---|
| Deposit | FARNSWORTH'S ORIGINAL DESCRIPTION STATED THAT THE HIGHER PAYING ZONES IN AREA LIE IN SLIGHTLY CONSOLIDATED GRAVELS BENEATH IRON OXIDE-CEMENTED CONGLOMERATE AND ABOVE LAYER OF "BLUE CLAY." (NOW INTERPRETED AS EOCENE BEDROCK). AU CONCENTRATIONS IN TERRACE AND MANTLE DEPOSITS APPEAR LIMITED TO LEVEL BELOW THE PROMINENT CONGLOMERATE OR "CAP ROCK," WHICH WAS INTERPRETED BY PARKER (1974) AND THEOBALD AS A DELTAIC FAN IN EITHER THE TIPTON TONGUE OF GREEN RIVER FM (EOCENE) OR CATHEDRAL BLUFFS MEMBER OF WASATCH FM (EOCENE). MODERN PLACERS THUS WERE DERIVED FROM EOCENE FOSSIL BEACH AND ALLUVIAL PLACERS AND PROBABLY BEGAN FORMING IN LATE PLIOCENE OR PLEISTOCENE TIME. AGE OF MINERALIZATION CITED FOR DEPOSIT DEPENDS ON UNIT WORKED--EOCENE FOR BEDROCK OPERATIONS OR QUATERNARY FOR TERRACE, STREAM BED, AND MANTLE OPERATIONS. THIS DEPOSIT APPEARS TO BE SIMILAR TO THAT IN THE HIGHER TRIBUTARY CUTS AT TIMBERLAKE MINING AND DEVELOPMENT CO. OPERATIONS 0.5 MILE TO SE. ON AIRPHOTOS, CUTS AT THIS OPERATION |
| Deposit | APPEAR TO BE IN STREAM BED ALLUVIUM AND IN ADJACENT GROUND (POSSIBLE BEDROCK). PARKER STATED THAT THE APPARENT TERRACE DEPOSIT TO THE SE COULD BE A FAN OF (ANCESTRAL?) HOUSEL GULCH ORIGIN. STREAM BED |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-DEC-1982 | Schwochow, Stephen D. | Colorado Geological Survey |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.
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