The Zortman - Landusky is a gold mine located in Phillips county, Montana.
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
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.
Zortman - Landusky MRDS details
Site Name
Primary: Zortman - Landusky
Secondary: Little Rockies
Secondary: Zortman Mine
Secondary: Landusky Mine
Commodity
Primary: Gold
Location
State: Montana
County: Phillips
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Producer
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Physiography
General Physiographic Area: Interior Plains
Physiographic Province: Great Plains Province
Physiographic Section: Missouri Plateau, Unglaciated
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: The Upper Portions Of Deposits Have Oxidized To Depths Of Up To 250 Meters, And The Ores Exploited To Date Have Come From These Zones.
Rocks
Name: Syenite
Role: Host
Age Type: Host Rock
Age Young: Pliocene
Analytical Data
Not available
Materials
Ore: Sylvanite
Ore: Fluorite
Comments
Comment (Location): 120 MILES NORTHEAST OF BILLINGS, 50 MILES SOUTHEAST OF MALTA
Comment (Reserve-Resource): YEAR END 1991: 110 MILLION TONS AT A GRADE OF .018 OZ GOLD PER TON. METAL RESERVES:2,005,752 OZ GOLD.
Comment (Workings): HISTORICALLY THE ZORTMAN AND LANDUSKY DEPOSITS HAVE BEEN TREATED AS A SINGLE OPERATION. IN THE PAST MINING HAS NORMALLY BEEN CARRIED OUT AT ONE DEPOSIT WHILE EXPLORATION AND SUBSEQUENT DEVELOPMENT WAS CARRIED OUT AT THE OTHER. AT PRESENT (1993) MINING IS TAKING PLACE ON THE LANDUSKY SIDE WHILE THE ZORTMAN EXPANSION PROJECT IS BEING COMPLETED. ORE MINED FROM THE OPEN PITS AT THE ZORTMAN/LANDUSKY MINE IS HAULED TO NEARBY LEACH PADS. THE ORE REQUIRES NO CRUSHING AND/OR AGGLOMERATING AFTER BLASTING AND CAN BE PROCESSES AS RUN-OF-MINE MATERIAL. AFTER THE ORE HAS BEEN PLACED ON THE PAD, A SPRINKLER AND DRIP SYSTEM APPLIES AN ALKALINE CYANIDE SOLUTION TO DISSOLVE GOLD AND SILVER. THE GOLD AND SILVER SOLUTION IS GRAVITY-FED OR PUMPED TO A PREGNANT POND OR DIRECTLY TO A CARBON RECOVERY PLANT.
Comment (Geology): THE HOST ROCKS ARE TERTIARY HYPABYSSAL INTRUSIONS OF MARGINALLY-ALKALINE SYENITE AND QUARTZ MONZONITE, INTO WHICH PHREATIC BRECCIA VEINS AND DIKES HAVE BEEN EMPLACED.
References
Reference (Production): 1992-92 RANDOL MINING DIRECTORY
Reference (Reserve-Resource): 1992-93 RANDOL MINING DIRECTORY
Reference (Deposit): 1992-93 RANDOL MINING DIRECTORY, P. 242
Reference (Deposit): CORRY, A.V., 1933, SOME GOLD DEPOSITS OF BROADWATER, BEAVERHEAD, PHILLIPS, AND FERGUS COUNTIES, MONTANA: MONT. BUREAU OF MINES AND GEOL. MEM. 10, P. 30-36
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.
