Mine detail: West Mayacmas District Report

Previously called ''

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Location

Lat / long:

38.19989, -122.60106

Resource(M)

Primary:	Chromium, Mercury
Discovery year:	1850

Production

Operation type:	Unknown
Deposit type:	STOCKWORK, VEINS, DISSEMINATED, INCRUSTATIONS
Production size:	Medium
Development status:	Producer
First production started:	1861

Geology

Structure:	THE MAJOR SHEAR ZONES, CHANGES IN ATTITUDE OF A FAULT OR SPLITS IN A FAULT, NW STRIKE OF FRANCISCAN ROCKS AND DIP STEEPLY NE, NW TRENDING FAULT ZONES
Alteration processes:	SILICA CARBONATE ALTERATION OF SERPENTINE, INDURATION OF SEDIMENTS

References

MRDS	M055694
DEP	60000984
Reference	{Deposit:: HOLMES, G. W., JR., 1965, MERCURY IN CALIFORNIA: IN USBM IC 8252}{Deposit:: HONKE, M. J., JR., AND VER PLANCK, W. E., JR., 1950, MINES AND MINERAL RESOURCES OF SONOMA COUNTY, CALIFORNIA; CALIF. JOUR. OF MINES AND GEOLOGY, V. 46, P. 98 - 105}{Deposit:: RANSOME, A. L. AND KELLOGG, J. L., 1939, QUICKSILVER RESOURCES OF CALIFORNIA: CALIF. JOUR. OF MINES AND GEOLOGY, V. 35, P. 353 - 486}