Mine detail: Boundary

Previously called 'Grass Valley Boundary'

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Location

Lat / long:

39.21517, -121.08298

Resource(M)

Primary:	Gold
Secondary:	Lead, Copper
Ore:	Chalcopyrite, Galena, Gold, Pyrite
Gangue:	Epidote, Quartz

Production

Operation type:	Unknown
Production size:	Small
Development status:	Past Producer

Geology

Host type:

Diabase

References

MRDS	C011258
DEP	10007420
Reference	{Deposit:: JOHNSTON, W. D., 1940 , THE GOLD QUARTZ VEINS OF GRASS VALLEY, CALIFORNIA: US GEOLOGICAL SURVEY PROFESSIONAL PAPER 194 , P. 63 - 65 .}{Deposit:: LOGAN, C. A., 1941 , MINERAL RESOURCES OF NEVADA COUNTY: CALIFORNIA JOURNAL OF MINES AND GEOLOGY, V. 37 , NO. 3 , P. 387 , PL. 3 .}
Reporter	Bowman, J. And Albers, J., Mosier, Dan