Mine detail: Bear Basin

Previously called 'Bear Creek Prospects'

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Location

Lat / long:

47.63953, -121.48648

Resource(M)

Primary:	Silver, Lead, Zinc, Copper, Gold
Tertiary:	Antimony, Tin, Arsenic
Ore:	Chalcopyrite, Freibergite, Galena, Jamesonite, Molybdenite, Pyrite, Sphalerite, Stannite, Stibnite
Gangue:	Quartz
Orebody form:	VEIN
Discovery year:	1925

Production

Operation type:	Unknown
Production size:	Unknown
Development status:	Occurrence

Geology

Host rock:	Snoqualmie Batholith, Northern Phase
Host type:	Diorite
Structure:	Steeply Dipping Shear Zone
Tectonic:	Cascade Volcanic Arc
Alteration processes:	Sericitization, Kaolinization, Silicification

References

MRDS	D001647
DEP	10094251
Reference	{Deposit:: PURDY, C.P., JR., 1951, ANTIMONY OCCURRENCES OF WASHINGTON: WASHINGTON DIVISION OF MINES AND GEOLOGY BULLETIN 39, P. 84-87.}{Deposit:: HUNTTING, M.T., 1956, INVENTORY OF WASHINGTON MINERALS: WASHINGTON DIVISION OF MINES AND GEOLOGY BULLETIN 37, V. 1, P. 295.}{Deposit:: GUALTIERI, J.L., THURBER, H.K., MILLER, M.S., MCMAHAN, A.B., AND FEDERSPIEL, F.F., 1975, MINERAL RESOURCES OF ADDITIONS TO THE ALPINE LAKES STUDY AREA, CHELAN, KING, AND KITTITAS COUNTIES, WASHINGTON: U.S. GEOLOGICAL SURVEY OPEN-FILE REPORT 75-3, P. 64-67.}{Production:: GUALTIERI AND OTHERS, 1975}
Reporter	Miller, M. H., Peterson, Jocelyn A.