The Potratz Prospect is a gold, silver, and copper mine located in Lewis and Clark 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.
Potratz Prospect MRDS details
Site Name
Primary: Potratz Prospect
Commodity
Primary: Gold
Primary: Silver
Primary: Copper
Tertiary: Molybdenum
Tertiary: Tungsten
Location
State: Montana
County: Lewis and Clark
District: Ophir 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
Type: Underground
Ownership
Owner Name: Guy Potratz
Home Office: Avon, Mt.
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Rocky Mountain System
Physiographic Province: Northern Rocky Mountains
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Type: R
Description: Boulder Batholith
Alterations
Not available
Rocks
Name: Limestone
Role: Host
Age Type: Host Rock
Age Young: Late Permian
Analytical Data
Not available
Materials
Ore: Chalcopyrite
Ore: Gold
Ore: Silver
Ore: Scheelite
Gangue: Quartz
Gangue: Magnetite
Comments
Comment (Location): COUNTY NAME CHANGED FROM POWELL TO LEWIS AND CLARK 11/91 BY D.F. SPOKANE MIO. SECTION 16 IS IN LEWIS AND CLARK COUNTY. ALL REFERENCES LOCATE PROPERTY IN SECTION 16 OF T 11 N, R 7 W. USBM - RI-6334 AND MBMG BULLETIN 98 BOTH HAVE SECTION 16 AS LOCATION BUT SAY POWELL COUNTY. ; INFO FROM LAND.ST :(1959)
Comment (Production): ITEM 1: ONLY $1000.
Comment (Deposit): HIGH GARNET-TACTITE ZONE OCCURS ALONG A LIMESTONE-DIORITE CONTACT. SCATTERED SMALL CRYSTALS OF SCHEELITE AND POWLLITE OCCUR ALONG CONTACT.
Comment (Workings): ADIT, SHAFT (CAVED), 12 AND 38 FT SHAFTS, 2 20FT INCLINES
References
Reference (Production): WALKER, 1963, USBM REP. INVES. 6334
Reference (Deposit): USBM RI 6334, P. 6, 50, 51
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.
