| Location: | Napa, Yolo, Lake County, California, United States, North America |
| Lat / long: | 38.4435, -122.383 |
| dep_id: | 10085020 |
| mrds_id: | W700452 |
| Commodity type: | metallic and nonmetallic |
| Major mineral: | Silver, Gold |
| Minor mineral: | Mercury |
| Trace mineral: | Antimony, Arsenic, Titanium, Metal, Tungsten, Boron-Borates |
| Operation type: | Unknown |
| Production size: | Production occurred |
| Development status: | Producer |
| ore: | Cinnabar, Stibnite |
| gangue: | Barite, Calcite, Dolomite, Marcasite, Pyrite |
| model: | 104: Hot-spring Au-Ag |
| alteration: | 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. |
| ore_ctrl: | Fractures May Have Focused Hydrothermal Fluid Flow And Provided Open-Space Collection Areas For Exsolved Gaseous Phases. |
| Reporter: | Paidakovich, Matthew E., Moyer, Lorre A. |
| hrock_type: | Mudstone,Siltstone,Conglomerate |
| arock_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. |
| Year first produced: | 1985 |
| disc_yr: | 1978 |
| discr: | Homestake Mining Co. |
| References: |
- 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.
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