| Deposit ID | 10012567 |
|---|---|
| MRDS ID | D008250 |
| Record type | Site |
| Current site name | Darby Extension |
| Alternate or previous names | Derby Extension |
| Point of reference | Pit |
|---|---|
| Geographic coordinates: | -105.36724, 38.24112 (WGS84) |
| Elevation | 2377 |
| Relative position | 8.2 MILES N09W OF QUERIDA |
Political divisions (FIPS codes)
Custer(county)
Colorado(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Mount Tyndall(quadrangle 1:24,000 scale)
Canon City(quadrangle 1:100,000 scale)
Pueblo(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Arkansas Headwaters(hydrologic unit)
Upper Arkansas(hydrologic accounting unit)
Upper Arkansas(hydrologic subregion)
Arkansas-White-Red(hydrologic region)
| Country | State | County |
|---|---|---|
| United States | Colorado | Custer |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| 6th Principal | 021S | 071W | 07 | NE OF NE | Colorado |
| Commodity | Importance |
|---|---|
| Thorium | Primary |
| REE Critical | Primary |
| Barium-Barite Critical | Tertiary |
| Copper | Tertiary |
| Lead | Tertiary |
| Materials | Type of material |
|---|---|
| Barite | Ore |
| Chalcopyrite | Ore |
| Galena | Ore |
| Thorite | Ore |
| Calcite | Gangue |
| Limonite | Gangue |
| Pyrite | Gangue |
| Quartz | Gangue |
| Siderite | Gangue |
| Result | CHANNEL AND GRAB SAMPLES: 0.19 TO 0.25% EQUIVALENT U, .001 TO .003% U, .12 TO 1.65% EQUIVALENT TH02, 1.39% TH02, 0.18% RARE EARTH OXIDES |
|---|---|
| Result | MINOR AMOUNTS OF CE, LA, ND, SM, TH AND Y DETECTED BY SEMI-QUANTITATIVE SPECTOGRAPHIC ANAYSIS |
| Model code | 30 |
|---|---|
| USGS model code | 11d |
| Deposit model name | Thorium-rare-earth veins |
| Host or associated | Host | ||||
|---|---|---|---|---|---|
| Rock type | Metamorphic Rock > Gneiss | ||||
| Rock unit name | Hornblende Gneiss | ||||
| Rock description | Hornblende Gneiss | ||||
| |||||
| Host or associated | Host |
|---|---|
| Rock type | Plutonic Rock > Granitoid > Granite |
| Pit (1) | -105.36724, 38.24112 |
|---|
| Type of structure | Regional |
|---|---|
| Structure description | Wet Mountains |
| Type of structure | Local |
| Structure description | Large, Northwest-Trending Dead Mule Gulch Fault; Smaller, Northeast-Trending Fault |
| Width | 30.48M |
|---|
| Development status | Past Producer |
|---|---|
| Commodity type | Both |
| Deposit size | Small |
| Significant | No |
| District name | Wet Mountains Area; Mckinley Mountain Area |
|---|
| Ownership category | Private |
|---|
| Type | Owner |
|---|---|
| Owner | C. L. Briggs, (Patented Mineral Rights) |
| Home office | 1808 Juneway Terrace, Chicago 26, Il. |
| First year | 1953 |
| Type of workings | Surface/Underground |
|---|---|
| Length | 38.1M |
| Overall depth | 30.48M |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | D008250 | |
| U.S. Bureau of Mines | Minerals Availability System | MAS | 0080270023 | data consolidated into this record |
BROCK, M.R. AND SINGEWALD, Q.D., 1968, GEOLOGIC MAP OF THE MOUNT TYNDALL QUADRANGE, CUSTER COUNTY, COLORADO: USGS MAP GQ-596.
CHRISTMAN, R.A., BROCK, M.R., PEARSON, R.C., AND SINGEWALD, Q.D., 1959, GEOLOGY AND THORIUM DEPOSITS OF THE WET MOUNTAINS, COLORADO, A PROGRESS REPORT: USGS BULLETIN 1072-H, P.522-524.
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-DEC-1981 | Collins, Donna B. | Colorado Geological Survey |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.
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