Arsenic - Cobalt Occurrence

The Arsenic - Cobalt Occurrence is a arsenic mine located in Sanders county, Montana at an elevation of 2,799 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

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.

Site Name

Primary: Arsenic - Cobalt Occurrence

Commodity

Primary: Arsenic
Tertiary: Cobalt
Tertiary: Copper

Location

State: Montana
County: Sanders
District: Plains 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

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

General Physiographic Area: Rocky Mountain System
Physiographic Province: Northern Rocky Mountains
Physiographic Detail: Coeur D'Alene Mountains

Mineral Deposit Model

Not available

Orebody

Form: POD/LENS

Structure

Type: L
Description: Gabbro Occurs As A Sill.

Alterations

Not available

Rocks

Name: Gabbro
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic

Name: Gabbro
Role: Associated
Age Type: Associated Rock Unit
Age Young: Neoproterozoic

Name: Gabbro
Role: Associated
Age Type: Associated Rock
Age Young: Neoproterozoic

Name: Gabbro
Role: Associated
Age Type: Host Rock Unit
Age Young: Neoproterozoic

Analytical Data

Analytical Data: HIGH ARSENOPYRITE SAMPLE ASSAYED 16.55% AS AND 0.055% CO

Materials

Ore: Chalcopyrite
Ore: Pyrrhotite
Gangue: Pyrite
Gangue: Quartzite

Comments

Comment (Development): OCCURRENCE DOES NOT APPEAR TO HAVE MUCH ECONOMIC SIGNIFICANCE

Comment (Location): ON WEST BANK OF CLARK FORK RIVER

Comment (Geology): ARSENOPYRITE IS EUHEDRAL AND IS SPARSELY SCATTERED THROUGHOUT THE SILL. VEINS OF QUARTZ CONTAINING PYRITE AND CHALCOPYRITE CUT THE ARSENOPYRITE ; GEOL.DESC: SELECTED SAMPLE, 16.55% AS, 0.055% CO

Comment (Deposit): DEPOSIT APPEARS TO BE ASSOCIATED WITH QUARTZ VEINS WITHIN THE GABBROIC SILL. MINERALIZATION IS MOST APPARENT NEAR THE PRICHARD-INTRUSIVE CONTACT.

References

Reference (Deposit): CROWLEY, F. A., 1963 , MINES AND MINERAL DEPOSITS (EXCEPT FUELS) SANDERS COUNTY MONTANA: MONTANA BUREAU OF MINES AND GEOLOGY BULL. 34 , P. 24-25 .

Reference (Deposit): CONSV. DIV. COMP. DATE, 06-13-1963

Reference (Analytical Data): SRC.REF: CROWLEY, F. A., 1963 : MONTANA BUREAU OF MINES AND GEOLOGY BULL. 34 , P. 25 .

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.