| Deposit ID | 60000302 |
|---|---|
| MRDS ID | D003931 |
| Record type | District |
| Current site name | Lemhi Pass Area |
| Geographic coordinates: | -113.4628, 44.93679 (WGS84) |
|---|---|
| Relative position | DISTRICT LIES ASTRIDE THE CONTINENTAL DIVIDE IN EAST-CENTRAL BEAVERHEAD MOUNTAINS ALONG THE IDAHO-MONTANA BORDER. POINT LOCATION GIVEN ABOVE IS FOR THE LAST CHANCE MINE. THE DISTRICT ITSELF EXTENDS 3 1/2 MILES TO THE SW, 5 MILES TO THE SE, 4 MILES TO THE NORTH AND TWO MILES TO THE EAST AND TO THE WEST. |
Political divisions (FIPS codes)
Beaverhead(county)
Montana(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Lemhi Pass(quadrangle 1:24,000 scale)
Leadore(quadrangle 1:100,000 scale)
Dubois(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Red Rock(hydrologic unit)
Missouri Headwaters(hydrologic accounting unit)
Missouri Headwaters(hydrologic subregion)
Missouri(hydrologic region)
Federal lands
Beaverhead-Deerlodge National Forest(National Forest)
National Forest FS(Type of land area)
FS(Federal land areas administered by FS)
| Country | State | County |
|---|---|---|
| United States | Idaho | Lemhi |
| United States | Montana | Beaverhead |
| Commodity | Importance |
|---|---|
| Thorium | Primary |
| Uranium | Secondary |
| Copper | Secondary |
| (1) | -113.4628, 44.93679 |
|---|
| Type of structure | Local |
|---|---|
| Structure name | FAULTING |
| Structure description | FAULTING OCCURED DURING TWO PERIODS: PRE-CHALLIS WHERE SMALL FAULTS TREND N25 - 40E, DIPPING STEEPLY NW, AND OTHERS TRENDING N15 - 20W. THE LONG YEARIAN FAULT (N 67 E, 68 SE) IS HORIZONTALLY OFFSET BY 6500 FT. POST CHALLIS FAULTING DEVELOPED THE LEMHI PASS (N70W STEEP), BULL MOOSE (N29-50W STEEP), AND DAN PATCH (N38W 50 - 90 SW) FAULTS. THESE THREE FAULTS CONVERGE AT THEIR NW TRENDS. |
| Type of structure | Regional |
| Structure description | BELT SERIES ROCKS REGIONALLY TREND SW AND DIP 20 TO 50 DEGREES GENERALLY TO THE NORTH. |
| Development status | Prospect |
|---|---|
| Commodity type | Metallic |
TRITES, A. F., AND TOOKER, E. W., 1953 , URANIUM AND THORIUM DEPOSITS IN EAST-CENTRAL IDAHO AND SOUTHWESTERN MONTANA: US GEOLOGICAL SURVEY BULL 988-H.
SHARP, W. N., AND CAUENDER, W. S., 1962 , GEOLOGY AND THORIUM BEARING DEPOSITS OF THE LEMHI PASS AREA, LEMHI CO., IDA., AND BEAVERHEAD CO., MONT.,: US GEOLOGICAL SURVEY BULL 1126 .
GEACH, R. D., 1972 , MINES AND MINERAL DEPOSITS (EXCEPT FUELS), BEAVERHEAD CO., MONTANA,: MONTANA BUR. OF MINES AND GEOLOGY, BULL 85 .
STAATZ, M. H., 1972 , GEOLOGY AND DESCRIPTION OF THE THORIUM BEARING VEINS, LEMHI PASS QUAD., IDAHO AND MONTANA: US GEOLOGICAL SURVEY BULL. 1351 .
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-DEC-1979 | DOYLE, BRIEN (WELLS, JOHN) | U.S. Geological Survey |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.