| Deposit ID | 10048501 |
|---|---|
| MRDS ID | MP00090 |
| Record type | Site |
| Current site name | Picket Pin |
| Geographic coordinates: | -110.05108, 45.44936 (WGS84) |
|---|---|
| Elevation | 3048 |
| Relative position | AT THE SUMMIT OF PICKET PIN MOUNTAIN |
Political divisions (FIPS codes)
Sweet Grass(county)
Montana(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Picket Pin Mountain(quadrangle 1:24,000 scale)
Gardiner(quadrangle 1:100,000 scale)
Bozeman(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 | Sweet Grass |
| Commodity | Importance |
|---|---|
| Platinum Critical | Primary |
| Palladium Critical | Primary |
| Copper | Secondary |
| Nickel Critical | Secondary |
| Cobalt Critical | Tertiary |
| Iridium Critical | Tertiary |
| Gold | Tertiary |
| Arsenic Critical | Tertiary |
| Antimony Critical | Tertiary |
| Materials | Type of material |
|---|---|
| Chalcopyrite | Ore |
| Pentlandite | Ore |
| Pyrite | Ore |
| Pyrrhotite | Ore |
| Sperrylite | Ore |
| Apatite | Gangue |
| Calcite | Gangue |
| Chlorite | Gangue |
| Graphite | Gangue |
| Magnetite | Gangue |
| Plagioclase | Gangue |
| Quartz | Gangue |
| Talc | Gangue |
| Result | 6.1% NI, 14.6% CU, 0.2% CO, 1.4 PPM IR, 35 PPM PT, 44 PPM PD, 3.6 PPM AU IN SULFIDE-RICH SAMPLE (BOUDREAU AND MCCALLUM). 0.58% CU, 0.21% NI, 2.5 PPM PT (+IR, RU, RH), 2.5 PPM PD, 0.22 PPM AU (HOWLAND AND OTHERS). OZ/TON VALUES CONVERTED TO PPM |
|---|
| Host or associated | Host | ||||
|---|---|---|---|---|---|
| Rock type | Plutonic Rock > Mafic Intrusive Rock > Anorthosite | ||||
| |||||
| (1) | -110.05108, 45.44936 |
|---|
| 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 | Cross Faults Offset Sulfide Bearing Zone |
| General form | LENSES, PODS, PIPES, DISSEMINATED |
|---|---|
| Strike | NW |
| Dip | MODERATELY TO STEEPLY NORTH |
| Thickness | 150M |
| Length | 22000M |
| Depth to top | 0M |
| Development status | Occurrence |
|---|---|
| Commodity type | Metallic |
| Deposit size | Medium |
| Significant | No |
| Discovery year | 1936 |
| District name | In Stillwater Complex |
|---|
| Ownership category | National Forest |
|---|
| Type | Operator |
|---|---|
| Owner | Anaconda Co. |
| First year | 1980 |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | MP00090 |
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.
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, 15 P.
| Subject category | Comment text |
|---|---|
| Deposit | SULFIDE ZONE IS STRATIFIED WITHIN UPPER 150 M OF ANORTHOSITE SUBZONE II AND CAN EXTEND UP TO TROCTOLITE BUT GENERALLY ENDS ABOUT 10 M FROM TOP OF ANORTHOSITE WHERE THERE IS A DISTINCT TEXTURAL CHANGE. MINERALIZING SOLUTIONS PERCOLATED UPWARD DURING SOLIDIFICATION OF ANORTHOSITE. HOWLAND AND OTHERS NOTED THAT THE SULFIDES ARE INTERSTITIAL TO SILICATES AND PARTLY REPLACE THEM. DEPOSIT HAS HIGHER CU AND LOWER NI THAN J-M REEF; UNPUBLISHED MODEL NAME: PICKET PIN MINERALIZATION. |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-SEP-1991 | Peterson, Jocelyn A. | U.S. Geological Survey |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.
MRDS records operators as of each record's last update (≤ 2019). Some of the operators listed here have since changed hands or dissolved:
Curated by qvyshift.com from publicly-reported M&A activity (SEC filings, press releases, USGS Mineral Yearbooks). Not authoritative — verify against primary sources before relying on it. The MSHA panel above is the current authoritative source for actively-permitted mines.