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  3. Mineral Resource Data System (MRDS)

Alaskite

Occurrence in Sweet Grass county in Montana, United States with commodities Platinum, Palladium, Chromium, Copper, Nickel
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Geologic information

Identification information

Deposit ID 10056261
MRDS ID SP01188
Record type Site
Current site name Alaskite

Geographic coordinates

Geographic coordinates: -110.04941, 45.43825 (WGS84)
Elevation 2804
Relative position ABOUT 0.8 MI SOUTH OF PICKET PIN MOUNTAIN
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Geographic areas

Country State County
United States Montana Sweet Grass

Comments on the location information

  • IN CUSTER NATIONAL FOREST. UNSURVEYED

Commodities

Commodity Importance
Platinum Primary
Palladium Primary
Chromium Primary
Copper Primary
Nickel Primary

Materials information

Materials Type of material
Chromite Ore

Analytical data

Result BULK SAMPLE FROM SEGREGATION ALONG MARGIN OF ALASKITE ASSAYED 5.1 PPM PT, 3.4 PPM PD, 0.4 PPM RH, 0.24 WT% NI, 0.03 WT% CU, AND 5 WT% CR2O3

Nearby scientific data

(1) -110.04941, 45.43825
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Geologic structures

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)

Comments on the geologic information

  • AGE OF STILLWATER COMPLEX IS 2,705 +/- 4 MA BASED ON U-PB SYSTEMATICS ON ZIRCON-BADDELEYITE (PREMO AND OTHERS, 1990). ALASKITE MAY BE A LARGE TILTED BLOCK WITHIN THE STILLWATER COMPLEX

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name In Stillwater Complex

Land status

Ownership category National Forest

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS SP01188

Bibliographic references

  • Analytical Data

    CZAMANSKE AND OTHERS, 1991; CONN, 1979

  • Deposit

    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.

  • Deposit

    PREMO, W.R., HELZ, R.T., ZIENTEK, M.L., AND LANGSTON, R.B., 1990, U-PB AND SM-ND AGES FOR THE STILLWATER COMPLEX AND ITS ASSOCIATED SILLS AND DIKES, BEARTOOTH MOUNTAINS, MONTANA: IDENTIFICATION OF A PARENT MAGMA?: GEOLOGY, V. 18, P. 1065-1068.

  • Deposit

    CZAMANSKE, G.K., ZIENTEK, M.L., AND MANNING, C.E., 1991, LOW-K GRANOPHYRES OF THE STILLWATER COMPLEX, MONTANA: AMERICAN MINERALOGIST, V. 76, P. 1646-1661.

  • Deposit

    CONN, H.K., 1979, THE JOHNS-MANVILLE PLATINUM-PALLADIUM PROSPECT, STILLWATER COMPLEX, MONTANA, U.S.A.: CANADIAN MINERALOGIST, V. 17, P. 463-468.

General comments

Subject category Comment text
Deposit UNPUBLISHED MODEL NAME: OTHER PGE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-AUG-1993 Peterson, Jocelyn A. U.S. Geological Survey