The Pennsylvania Mine is a copper and silver mine located in Broadwater 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.
Pennsylvania Mine MRDS details
Site Name
Primary: Pennsylvania Mine
Commodity
Primary: Copper
Primary: Silver
Secondary: Gold
Location
State: Montana
County: Broadwater
Land Status
Not available
Holdings
Not available
Workings
Type: Surface/Underground
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Prospect
Operation Type: Unknown
Discovery Year: 1885
Years of Production:
Organization:
Significant: N
Physiography
General Physiographic Area: Rocky Mountain System
Physiographic Province: Northern Rocky Mountains
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Type: L
Description: Short Distance From Lombard Over Thrust
Alterations
Alteration Type: L
Alteration Text: Marmarized Limestone Locally Garnstized And Altered In Tactites
Rocks
Name: Diorite
Role: Associated
Age Type: Host Rock
Age Young: Mississippian
Name: Diorite
Role: Associated
Age Type: Associated Rock
Age Young: Pliocene
Name: Diorite
Role: Associated
Age Type: Host Rock Unit
Age Young: Mississippian
Analytical Data
Analytical Data: PER TON (1918). ONE VEIN CONTAINED 24.6 % CU.
Analytical Data: 5.8 OZ-AG
Analytical Data: .18 OZ-AU
Analytical Data: ONE REPORT INDICATED 9.3 %-CU
Materials
Gangue: Bornite
Comments
Comment (Geology): DIORITE SILL THOUGHT TO BE PART OF THE 10N MONZONITIC PLUTON. ; GEOL.DESC: ZONE ASSOC. WITH DIORITE SILLS IN MARMARIZED LIMESTONE, OXIDIZED CU MINERALS, CU SULFIDES SPORADICALLY CONCENTRATED ALONG COMPLEX FRACTURE SYSTEM; SAID TO RANGE 3-24% CU.
Comment (Workings): 600 FT SHAFT, 3 LEVELS
Comment (Deposit): Discovery Year: 1880'S
References
Reference (Deposit): CONSV. DIV. COMP. DATE, 06-05-1963
Reference (Deposit): 1951 COMPILE USBM INF. CIRC. 759
Reference (Deposit): REED, GC., 1951, MINES AND MINERAL DEPOSITS, BROADWATER CO, MONT, USBM, INF. CIRC. 7592, P. 53
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.
