Mine detail: Boulder Group

Previously called 'Boulder Ridge Mining Co.Cobalt Gold Mines Inc.'

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Location

Lat / long:

44.55318, -118.62633

Resource(M)

Primary:	Gold, Silver, Copper, Zinc, Cobalt, Nickel, Arsenic
Ore:	Chalcopyrite, Pyrite, Pyrrhotite, Smaltite, Sphalerite
Gangue:	Calcite, Quartz

Production

Operation type:	Unknown
Deposit type:	Vein
Production size:	None
Development status:	Occurrence

Geology

Host type:

Andesite

References

MRDS	M015075
DEP	10033126
Reference	{Deposit:: OREGON METAL MINES HANDBOOK, 1941 , ODGMI BULL. 14 - B, P. 110 .}{Deposit:: JOHNSON, F.R., 1975, GEOLOGY OF THE QUARTZBURG MINING DISTRICT, GRANT COUNTY, OREGON; OREGON STATE UNIV. MS. THESIS, P.81}{Deposit:: IN THE US: ENGINEERING & MINING JOURNAL, SEPT. 1959, VOL. 160, NO. 9, P. 172}
Reporter	Lee, W., Bradley, Robin (Walker, George W.), Gray, Jerry J.