| Deposit ID | 10014105 |
|---|---|
| MRDS ID | D010742 |
| Record type | Site |
| Current site name | Rio Grande Claims |
| Alternate or previous names | Unpatented Claims: Rio Grande 1-10 |
| Geographic coordinates: | -107.38896, 37.76445 (WGS84) |
|---|---|
| Elevation | 3011 |
| Relative position | 18.5 MILES S 13 W FROM LAKE CITY |
Political divisions (FIPS codes)
Hinsdale(county)
Colorado(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Pole Creek Mountain(quadrangle 1:24,000 scale)
Silverton(quadrangle 1:100,000 scale)
Durango(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Rio Grande Headwaters(hydrologic unit)
Rio Grande Headwaters(hydrologic accounting unit)
Rio Grande Headwaters(hydrologic subregion)
Rio Grande(hydrologic region)
Federal lands
Rio Grande National Forest(National Forest)
National Forest FS(Type of land area)
FS(Federal land areas administered by FS)
| Country | State | County |
|---|---|---|
| United States | Colorado | Hinsdale |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| New Mexico | 041N | 005W | 35 | S2 | Colorado |
| Commodity | Importance |
|---|---|
| Uranium | Primary |
| Result | BACKGROUND RADIATION 0.05 MR/HR, RANGE 0.2 TO 0.3 MR/HR |
|---|---|
| Result | STEVEN AND OTHERS' SAMPLE CONTAINED 0.13% U308 |
| Host or associated | Associated | ||||
|---|---|---|---|---|---|
| Rock type | Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite | ||||
| Rock unit name | Eolus Granite;Ute Ridge Tuff | ||||
| Rock description | Eolus Granite;Ute Ridge Tuff | ||||
| |||||
| Host or associated | Host | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rock type | Plutonic Rock > Granitoid > Granite | ||||||||||||||||||||
| Rock unit name | Eolus Granite;Ute Ridge Tuff | ||||||||||||||||||||
| Rock description | Eolus Granite;Ute Ridge Tuff | ||||||||||||||||||||
| |||||||||||||||||||||
| (1) | -107.38896, 37.76445 |
|---|
| Type of structure | Regional |
|---|---|
| Structure description | San Juan Volcanic Field |
| Type of structure | Local |
| Structure description | Ute Creek Caldera, Lost Lake Caldera; Unnamed Fault |
| Development status | Occurrence |
|---|---|
| Commodity type | Metallic |
| Deposit size | Small |
| Significant | No |
| District name | Rio Grande Reservoir Area |
|---|
| Ownership category | National Forest |
|---|
| Type | Owner |
|---|---|
| Owner | C. C. Wetherill |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | D010742 |
STEVEN, T.A., AND OTHERS, 1969, MINERAL RESOURCES OF THE SAN JUAN PRIMITOVE AREA, COLORADO: USGS BULL. 1261-F, P. 113-114.
STEVEN, T.A., AND OTHERS, 1974, GEOLOGIC MAP OF THE DURANGO QUADRANGLE, SOUTHWESTERN COLORADO: USGS MAP I-764.
STEVEN, T.A., AND LIPMAN, P.W., 1976, CALDERAS OF THE SAN JUAN VOLCANIC FIELD, SOUTHWESTERN COLORADO: USGS PROF. PAPER 958, P. 7-10.
| Subject category | Comment text |
|---|---|
| Deposit | ANOMALY WAS ABOVE-BACKGROUND RADIOACTIVITY IN FRACTURES(?) IN SMALL OUTCROP OF PRECAMBRIAN EOLUS GRANITE BENEATH THICK, INTRACALDERA UTE RIDGE TUFF IN UTE CREEK CALDERA. THICK INTRACALDERA SECTION OF TUFF AND THIN OUTFLOW SHEET SUGGEST SUBSIDENCE OF CALDERA CONCURRENT WITH ERUPTION. SUBSIDENCE RIM ON EAST NOTED BY STEVEN AND LIPMAN (1976), BUT LACK OF RING FRACTURE ON WEST SUGGESTS TRAP-DOOR COLLAPSE. LATER INTRUSIVES ALONG SOUTH RIM ON UTE CREEK AND ALONG WNW-TRENDING FAULT ACROSS RIVER VALLEY SW OF DEPOSIT. CALDERA IS TANGENTIAL ON EAST WITH LATER, BURIED LOST LAKE CALDERA. |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-JUL-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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