The Boulder River Ni-Cu Riverside is a nickel and copper mine located in Sweet Grass county, Montana at an elevation of 5,499 feet.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
Elevation: 5,499 Feet (1,676 Meters)
Commodity: Nickel, Copper
Lat, Long: 45.47306, -110.19889
Map: View on Google Maps
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Boulder River Ni-Cu Riverside MRDS details
Site Name
Primary: Boulder River Ni-Cu Riverside
Secondary: Riverside Prospect
Commodity
Primary: Nickel
Primary: Copper
Secondary: Cobalt
Tertiary: PGE
Tertiary: Gold
Tertiary: Silver
Location
State: Montana
County: Sweet Grass
District: In Stillwater Complex
Land Status
Land ownership: National Forest
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.
Holdings
Not available
Workings
Not available
Ownership
Owner Name: Charles Blakeley And Charles Kasnick
Years: 1950 -
Owner Name: Anaconda Co.
Years: 1977 -
Production
Not available
Deposit
Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Rocky Mountain System
Physiographic Province: Middle Rocky Mountains
Mineral Deposit Model
Model Name: Stillwater Ni-Cu
Orebody
Form: STRATIFORM, PODS, LENSES, DISSEMINATED
Structure
Type: R
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: L
Description: East-West And Northwest Trending Faults
Alterations
Alteration Type: L
Alteration Text: None Related To Ore-Forming Process
Rocks
Name: Peridotite
Role: Host
Age Type: Associated Rock Unit
Age Young: Neoarchean
Name: Peridotite
Role: Host
Age Type: Host Rock
Age Young: Early Cretaceous
Analytical Data
Analytical Data: ANALYSIS OF ORE SAMPLE COLLECTED ON DUMP: 0.3% CU, 0.3% NI, 23.1% FE, TR AU, TR AG, 0.06% CO. AVERAGE PGE: 50.8 PPB PT, 124.3 PPB PD, 11.2 PPB RH (MAX.: 170 PPB PT, 470 PPB PD, 32 PPB RH)
Materials
Ore: Pyrrhotite
Ore: Pentlandite
Ore: Chalcopyrite
Gangue: Plagioclase
Gangue: Magnetite
Comments
Comment (Development): DEPOSIT WAS KNOWN BY THE EARLY 1930'S
Comment (Workings): SHALLOW PITS, 2 ADITS. 3,065 FT OF DRILL CORE FROM 7 HOLES DRILLED IN 1977 (ANACONDA)
Comment (Deposit): RECORD DC08747 HAS BEEN MERGED AND DELETED.
Comment (Commodity): SEE PAGE (1979) FOR GENERAL DESCRIPTION OF BASAL SERIES MINERALIZATION. NO PUBLISHED PGE DATA AVAILABLE FOR THIS AREA
Comment (Location): UNSURVEYED. IN GALLATIN NATIONAL FOREST.
Comment (Deposit): 20-30 FT MINERALIZED ZONE. GEOCHEMICAL ANOMALY PRESENT IN AREA OF DEPOSIT
Comment (Geology): AGE OF STILLWATER COMPLEX IS 2,705 +/- 4 MA BASED ON U-PB SYSTEMATICS ON ZIRCON-BADDELEYITE (PREMO AND OTHERS, 1990)
References
Reference (Deposit): REED, G.C., 1950, MINES AND MINERAL DEPOSITS (EXCEPT FUELS), PARK COUNTY, MONT.: U.S. BUREAU OF MINES INFORMATION CIRCULAR 7546, P. 55.
Reference (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.
Reference (Deposit): ZIENTEK, M.L., AND RIPLEY, E.M., 1990, SULFUR ISOTOPIC STUDIES OF THE STILLWATER COMPLEX AND ASSOCIATED ROCKS, MONTANA: ECONOMIC GEOLOGY, V. 85, P. 376-391.
Reference (Deposit): ROBY, R.N., 1949, INVESTIGATION OF COPPER-NICKEL DEPOSITS OF THE STILLWATER COMPLEX, STILLWATER AND SWEETGRASS COUNTIES, MONT.: U.S. BUREAU OF MINES REPORT OF INVESTIGATIONS 4431, P. 10.
Reference (Deposit): PAGE, N.J, ROWE, J.J., AND HAFFTY, JOSEPH, 1976, PLATINUM METALS IN THE STILLWATER COMPLEX, MONTANA: ECONOMIC GEOLOGY, V. 71, P. 1356-1357.
Reference (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.
Reference (Deposit): 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.
Principal Gold Districts of Montana
In Montana, 54 mining districts have each have produced more than 10,000 ounces of gold. The largest producers are Butte, Helena, Marysville, and Virginia City, each having produced more than one million ounces. Twenty seven other districts are each credited with between 100,000 and one million ounces of gold production. Read more: Principal Gold Districts of Montana.
