Mine detail: McLaughlin Mine

Previously called ''

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Location

Lat / long:

38.4435, -122.383

Resource(B)

Primary:	Silver, Gold
Secondary:	Mercury
Tertiary:	Antimony, Arsenic, Titanium, Metal, Tungsten, Boron-Borates
Ore:	Cinnabar, Stibnite
Gangue:	Barite, Calcite, Dolomite, Marcasite, Pyrite
Discovery year:	1978

Production

Operation type:	Unknown
Production size:	Yes
Development status:	Producer
First production started:	1985

Geology

Host type:	Mudstone,Siltstone,Conglomerate
Associated type:	Pumice,Andesite,Basalt
Structure:	Major Regional Subduction Fault Boundary Dividing The Franciscan Ophiolite Melange Of The Coast Ranges From The Upper Jurassic Marine Sediments Of The Great Valley Forearc Basin. Fault Consists Of 300-800 Ft. Wide Zone Of Cataclasite And Slikentite. Fault Dips Ne 45 In The Mine Area., Hydrothermal Explosion Breccias, Hydraulically Fractured Rock Masses, Crackle Breccias, Clastic Dikes, And Chalcedony-Quartz Vein Stockwork.
Alteration processes:	Complex And Overlapping; Argillic Zones, Sporadic Alunite Nodules, Chlorite-Montmorillonite-Celadonite Assemblages. Pervasive Adularia Replacement In Hanging Wall. Irregular Zone Of Silica-Carbonate Alteration Parallels The Precious Metals System Within The Footwall.

References

MRDS	W700452
DEP	10085020
Reference	{Deposit:: ENGINEERING AND MINING JOURNAL, JUNE, 1988, P. 43.}{Deposit:: MINING MAGAZINE, JAN., 1988, P. 50.}{Deposit:: LEHRMAN, NORMAN J., 1986, THE MCLAUGHLIN MINE NAPA AND YOLO COUNTIES, CA.: NBMG REPORT 41 P. 85-89.}
Reporter	Paidakovich, Matthew E., Moyer, Lorre A.