| Deposit ID | 10069794 |
|---|---|
| MRDS ID | W007481 |
| Record type | Site |
| Current site name | Beartrap Corumdum Deposit |
| Related records | 10196812 |
| Geographic coordinates: | -111.53696, 45.51658 (WGS84) |
|---|---|
| Elevation | 1951 |
| Relative position | 26 MILES SW OF ROZEMAN. |
Political divisions (FIPS codes)
Madison(county)
Montana(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Bear Trap Creek(quadrangle 1:24,000 scale)
Bozeman(quadrangle 1:100,000 scale)
Bozeman(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Madison(hydrologic unit)
Missouri Headwaters(hydrologic accounting unit)
Missouri Headwaters(hydrologic subregion)
Missouri(hydrologic region)
Federal lands
Custer Gallatin National Forest(National Forest)
National Forest FS(Type of land area)
FS(Federal land areas administered by FS)
| Country | State | County |
|---|---|---|
| United States | Montana | Madison |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| Montana Principal | 004S | 002E | 06 | Montana |
| Commodity | Importance |
|---|---|
| Corundum | Primary |
| Kyanite | Secondary |
| Materials | Type of material |
|---|---|
| Corundum | Ore |
| Sillimanite | Ore |
| Feldspar | Gangue |
| Muscovite | Gangue |
| Result | LARGEST DEPOSIT HAS AVERAGE CONTENT 65% KYN, 6-7% COR. |
|---|
| 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 | Pony Series-Biotite Gneiss, Quartzite |
| Rock description | Pony Series-Biotite Gneiss, Quartzite |
| (1) | Gneiss and amphibolite |
|---|
| General form | LENS |
|---|---|
| Strike | N70E |
| Dip | 75-90SE |
| Plunge | 20 DEG |
| Plunge direction | NE |
| Thickness | 1.83M |
| Length | 15.24M |
| Development status | Occurrence |
|---|---|
| Commodity type | Non-metallic |
| Deposit size | Small |
| Significant | No |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | W007481 |
CLABAUGH, S. E., AND ARMSTRONG, F. C., 1950, CORUNDUM DEPOSITS OF GALLATIN AND MADISON COUNTIES, MONT.: U.S. GEOLOGICAL SURVEY BULL. 969 - B.
HEINRICH, E.W., 1948, DEPOSITS OF THE SILLIMANITE GROUP OF MINERALS SOUTH OF ENNIS, MADISON CO, MONT., MONT. BUR. OF MINES & GEOL., MISC. CONT. 10, P. 18
USBM INF CIRC 7641, P. 45.
1950 COMPILE CLABAUGH, ARMSTRONG, BULL 969-
| Subject category | Comment text |
|---|---|
| Deposit | STRIKE AND DIP GIVEN IS FOR HOST ROCK LAYERS. DEPOSITS ARE PARALLEL TO THE FOLIATION AND MAJOR LAYERING OF THE GNEISS. |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-MAR-1959 | Espenshade, Gilbert H. | U.S. Geological Survey | |
| Updater | 01-FEB-1980 | Doyle, Brien (Wells, John) | U.S. Geological Survey |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.