Commodities
PrimaryGold, Silver, Mercury
SecondaryArsenic, Antimony, Thallium
Commodity typeM
Deposit
Deposit typeHot Spring
Model104: Hot-spring Au-Ag
Deposit sizeS
Orebody formIRREGULAR
Ore controlNorthwest And Northeast Trending Steeply Dipping Faults
Geology
Host rockMudstone · Stony Creek Formation;Stony Creek Formation;Stony Creek Formation
StructureThrust Faults (Underthrust From Drag Caused By A Subducting Oceanic Plate In The Late Cretaceous), Many Folds And Faults: Wilbur Springs Antiform, Stony Creek Fault, Coast Range Thrust (Trending N10-15w To The North, N40w To The South), Abbott-Coyote Peak Fault Zone: Beds Generally Have A Northwest Dip And Trend.
Tectonic settingOuter Arc
Alteration"Adularized" Mudstone: Sericite, Adularia, Silica, Iron Sulfides (Pyrrhotite), Bitumen, Chlorite, Anhedral Dolomite Argillization: Smectite-Illite Clays, Purite/Marcasite, Cinnabar, Sericiite, Adularia
Economic & production
Development statusPast Producer
Identification
Deposit ID10048787
MRDS IDMP90012
RegionNA
Data scoreB
Coordinates39.04155, -122.4344
References
PEARCY, ENGLISH C., AND PETERSEN, ULRICH, 1989, MINERALOGY , GEOCHEMISTRY, AND ALTERATION OF THE CHERRY HILL, CALIFORNIA HOT-SPRING GOLD DEPOSIT: JOURNAL OF GEOCHEMICAL EXPLORATION, 36, 1990, P. 143-169NELSON, G.C., RYTUBA, J.J., MCLAUGHLIN, R.J., AND TOSDAL, R.M., 1993, GOLD AND MERCURY DEPOSITS IN THE SULPHUR CREEK DISTRICT, CALIFORNIA, IN RYTUBA, J.J., ED., ACTIVE GEOTHERMAL SYSTEMS AND GOLD-MERCURY DEPOSITS IN THE SONOMA-CLEAR LAKE VOLCANIC FIELDS, CALIFORNIA: SOCIETY OF ECONOMIC GEOLOGISTS, GUIDEBOOK SERIES, V. 16, P. 262 269.NELSON, 1993