Mine detail: Grass Valley District

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Location

Lat / long:

39.21659, -121.03433

Resource(M)

Primary:

Tungsten, Gold

Production

Operation type:	Unknown
Deposit type:	GOLD QUARTZ VEINS
Production size:	Yes
Development status:	Producer
First production started:	1915

Geology

Structure:

SIERRA NEVADA BATHOLITH

References

MRDS	D001063
DEP	60000011
Reference	{Deposit:: LEMMON, D.M., UNPUBLISHED DATA.}{Deposit:: LEMMON, D.M., AND TWETO, O.L., 1962, TUNGSTEN IN THE U.S., USGS MAP, MR-25.}{Deposit:: FARMIN, ROLLIN, 1941, OCCURENCE OF SCHEELITE IN THE IDAHO-MARYLAND MINES, CALIF. JOUR. MINES AND GEOL., VOL.37, NO.2, P.224.}{Deposit:: JOHNSTONE, W.D., 1940, THE GOLD QUARTZ VEINS OF GRASS VALLEY, CALIF.: USGS PROF. PAPER 194, P.43, 89, 97-98.}