The Grasshopper Prospect is a copper and zinc mine located in Beaverhead county, Montana at an elevation of 6,699 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: 6,699 Feet (2,042 Meters)
Commodity: Copper, Zinc
Lat, Long: 45.15556, -112.91667
Map: View on Google Maps
Satelite View
MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.
Grasshopper Prospect MRDS details
Site Name
Primary: Grasshopper Prospect
Commodity
Primary: Copper
Primary: Zinc
Secondary: Molybdenum
Secondary: Gold
Secondary: Silver
Location
State: Montana
County: Beaverhead
District: Bannack District
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: Molycorp
Years: 1982 -
Production
Not available
Deposit
Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Discovery Year: 1977
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Rocky Mountain System
Physiographic Province: Northern Rocky Mountains
Physiographic Detail: Pioneer Mountains
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: 2 Mi Diameter Alteration System
Rocks
Name: Dacite
Role: Host
Age Type: Host Rock
Age in Years: 73.400000+-3.500000
Dating Method: K-Ar
Age Young: Cretaceous
Name: Dacite
Role: Associated
Age Type: Host Rock
Age in Years: 73.400000+-3.500000
Dating Method: K-Ar
Age Young: Cretaceous
Analytical Data
Analytical Data: SAMPLE VALUES RANGE UP TO 620 PPM CU, 55 PPM MO, 0.23 PPM AU, 0.80 PPM AG, 680 PPM ZN
Materials
Ore: Chalcopyrite
Ore: Molybdenite
Ore: Silver
Ore: Gold
Gangue: Pyrite
Gangue: Limonite
Gangue: Magnetite
Comments
Comment (Location): 2 MI DIA PLUTON CENTERED ON C OF N2, SECT 11. ; INFO FROM LAND.ST :(1978)
Comment (Development): 3 ROTARY HOLES DRILLED IN 1978. TOTAL FOOTAGE, 1467 FT, MAX DEPTH, 550 FT.
Comment (Deposit): CONCENTRICLY ZONED STOCK. COMPOSITION, ALTERATION AND MINERALIZATION FORM CIRCULAR ZONES.
Comment (Workings): AFEW SMALL PITS, 3 DRILLHOLES
References
Reference (Deposit): MEYER, J.W., 1980 M.S. THESIS, U. OF ARIZ
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.
