Mine detail: Polaris Mine

Previously called 'Silver Fissure'

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Location

Lat / long:

45.36683, -113.08589

Resource(M)

Primary:	Silver, Copper, Zinc, Lead
Secondary:	Gold
Ore:	Copper, Galena, Sphalerite
Orebody form:	IRREGULAR, LENSES
Discovery year:	1883

Production

Operation type:	Unknown
Production size:	Small
Development status:	Past Producer
First production started:	1884

Geology

Host rock:	Madison Limestone;Quartzite (Hanging Wall)
Host type:	Limestone
Structure:	Eastward Thrust Faulting, Fault Zone (Polaris Fault) Strikes N 60 Deg E And Dips Approximately 45 To 60 Degrees Nw.
Alteration processes:	Limestone Country Rock Is Altered

References

MRDS	W026529
DEP	10078275
Reference	{Deposit:: MBMG BULL 85, P. 120-123.}{Deposit:: USGS BULL 574, P. 76.}{Deposit:: LAWSON, D.C., 1977, DIRECTORY OF MINING ENTERPRISES, 1976: MT. BUREAU OF MINES AND GEOL., BULL. 103, P. 3.}{Deposit:: 1914 RECON WINCHELL, A.N., U.S.G.S. BULL. 574}{Deposit:: 1972 COMPILE M.B.M.G. BULL. 85}{Production:: GEACH, R. D., 1972 , MINES AND MIN DEPOSITS (EXCEPT FUELS) BEAVERHEAD CO., MONT, P. 179}
Reporter	Mc Kenzie, Craig L.; R. B. Berg, Loen, Jeffrey S. (Pearson, Robert C.)