| Deposit ID | 10042344 |
|---|---|
| MRDS ID | M060097 |
| Record type | Site |
| Current site name | Little Rocky Creek Ni-Cu |
| Alternate or previous names | Benbow, Rocky Group, Chrome Lake |
| Geographic coordinates: | -109.80551, 45.35714 (WGS84) |
|---|---|
| Elevation | 2576 |
| Location accuracy | 100(meters) |
| Relative position | ABOUT 0.5 MI NORTHWEST OF CHROME LAKE, Acc Generalized Location Of Adit Near Little Rocks Creek |
Political divisions (FIPS codes)
Stillwater(county)
Montana(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Mount Wood(quadrangle 1:24,000 scale)
Red Lodge(quadrangle 1:100,000 scale)
Billings(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Stillwater(hydrologic unit)
Upper Yellowstone(hydrologic accounting unit)
Upper Yellowstone(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 | Stillwater |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| Montana Principal | 005S | 016E | 31 | Montana |
| Commodity | Importance |
|---|---|
| Nickel Critical | Primary |
| Copper | Primary |
| Cobalt Critical | Secondary |
| PGE Critical | Tertiary |
| Silver | Tertiary |
| Gold | Tertiary |
| Materials | Type of material |
|---|---|
| Chalcopyrite | Ore |
| Pentlandite | Ore |
| Pyrrhotite | Ore |
| Magnetite | Gangue |
| Plagioclase | Gangue |
| Result | AVERAGE OF ANALYSES OF SURFACE SAMPLES: 32.8 PPB PT, 9.1 PPB PD (MAX. 190 PPB PT, 18 PPB PD) |
|---|
| Model code | 1 |
|---|---|
| USGS model code | 1 |
| Deposit model name | Stillwater Ni-Cu |
| Host or associated | Host | ||||
|---|---|---|---|---|---|
| Rock type | Plutonic Rock > Granitoid > Quartz Monzonite | ||||
| |||||
| Host or associated | Host |
|---|---|
| Rock type | Plutonic Rock > Ultramafic Intrusive Rock > Peridotite |
| Host or associated | Host |
|---|---|
| Rock type | Metamorphic Rock > Hornfels |
| (1) | -109.80551, 45.35714 |
|---|
| Type of structure | Regional |
|---|---|
| Structure description | The Stillwater Complex Is Exposed Along The Northern Margin Of The Beartooth Uplift, One Of Several Laramide Basement-Cored Ranges That Make Up The Rocky Mountain Foreland Of South-Central Montana (Foose And Others, 1961: Kulik And Schmidt, 1988) |
| Type of structure | Local |
| Structure description | Local Faults Of Small Displacement |
| General form | MASSIVE AND DISSEMINATED |
|---|---|
| Depth to top | 0M |
| Development status | Occurrence |
|---|---|
| Commodity type | Metallic |
| Deposit size | Small |
| Significant | No |
| Discovery year | 1883 |
| Discoverer | Jack Nye, Jimmy And Jonas Hedges |
| District name | In Stillwater Complex |
|---|
| Ownership category | National Forest |
|---|
| Type | Operator |
|---|---|
| Owner | Amoco Minerals Co. (Operated Rocky Group) |
| First year | 1985 |
| Type of workings | Underground |
|---|---|
| Length | 91.44M |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | M060097 |
ROBY, R.N., 1949, INVESTIGATION OF COPPER-NICKEL DEPOSITS OF THE STILLWATER COMPLEX, STILLWATER AND SWEETGRASS COUNTIES, MONTANA: U.S. BUREAU OF MINES REPORT OF INVESTIGATIONS 4431, P. 10.
HOWLAND, A.L., PEOPLES, J.W., AND SAMPSON, EDWARD, 1936, THE STILLWATER IGNEOUS COMPLEX AND ASSOCIATED OCCURRENCES OF NICKEL AND PLATINUM GROUP METALS: MONTANA BUREAU OF MINES AND GEOLOGY MISCELLANEOUS CONTRIBUTION 7, P. 11.
ZIENTEK, M.L., 1993, MINERAL RESOURCE APPRAISAL FOR LOCATABLE MINERALS: THE STILLWATER COMPLEX, IN HAMMARSTROM, J.M., ZIENTEK, M.L., AND ELLIOTT, J.E., EDS., MINERAL RESOURCE ASSESSMENT OF THE ABSAROKA-BEARTOOTH STUDY AREA, CUSTER AND GALLATIN NATIONAL FORESTS, MONTANA: U.S. GEOLOGICAL SURVEY OPEN-FILE REPORT 93-207, P. F1-F83.
PAGE, N.J, 1979, STILLWATER COMPLEX, MONTANA - STRUCTURE, MINERALOGY, AND PETROLOGY OF THE BASAL ZONE WITH EMPHASIS ON THE OCCURRENCE OF SULFIDES: U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 1038, 69 P.
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-JAN-73 | Dohrenwend, John C. | U.S. Geological Survey | |
| Updater | 01-AUG-91 | Peterson, Jocelyn A. | U.S. Geological Survey |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.