The Iridescent Claim is a 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.
Iridescent Claim MRDS details
Site Name
Primary: Iridescent Claim
Commodity
Primary: Copper
Location
State: Montana
County: Lewis and Clark
District: Scratchgravel Hills District
Land Status
Not available
Holdings
Not available
Workings
Type: Surface
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Occurrence
Deposit Type: Contact Metasomatic
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
Type: L
Description: Scratchgravel Quartz Monzonite Stock
Alterations
Alteration Type: L
Alteration Text: Oxidation
Rocks
Name: Quartz Monzonite
Role: Associated
Age Type: Host Rock Unit
Age Young: Neoproterozoic
Name: Quartz Monzonite
Role: Associated
Age Type: Host Rock
Age Young: Late Cretaceous
Name: Quartz Monzonite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Late Cretaceous
Name: Quartz Monzonite
Role: Associated
Age Type: Associated Rock
Age Young: Late Cretaceous
Analytical Data
Not available
Materials
Ore: Chrysocolla
Ore: Malachite
Comments
Comment (Workings): OPEN PIT 15X20 FT AND 15 FT DEEP
Comment (Location): ABOUT 1 KM NW OF FOREST VALE CEMETERY.
Comment (Deposit): THE SURROUNDING GRANITE IS TRAVERSED BY SHEAR AND JOINT PLANES COATED WITH THIN CRUSTS OF MALACHITE AND CHRYSOCOLLA. THESE CRUSTS PROBABLY DERIVED FROM THE OXIDATION OF CHALCOPYRITE OR OTHER SULPHIDES THAT OCCUR IN THE METAMORPHOSED SEDIMENTS.
References
Reference (Deposit): USGS BULL 842, P. 55, PL. 3
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.
