Commodities
PrimaryCopper, Zinc
SecondarySilver, Gold, Lead
Commodity typeM
Deposit
Deposit sizeS
WorkingsUnderground
Orebody formLENTICULAR
Ore control3 Shear Zones - Trending Northwest, Called The Rising Star, Middle And East Shear Zones, And Along Several Small Faults.
Materials
Ore mineralsChalcocite, Chalcopyrite, Galena, Pyrite, Sphalerite
GangueAnhydrite, Gypsum
Geology
Host rockRhyolite · Bully Hill Rhyolite
StructureShear Zones; Rising Star Shear Zone Strikes N 60 Deg. W And Dips 80 Deg. Ne, 40 Ft. Thick Near Surface Thining With Depth. Middle Shear Zone Is Irregular, Generally Strikes N 30 Deg. W, Dips To Southwest 85 - 70 Deg., As Thick As 30 Ft.,
Tectonic settingIsland Arc
AlterationHydrothermal, Pyritization, Albitization, Chloritization, Silicification, Sulfatization And Hydrous Mica Alteration.
Economic & production
Development statusPast Producer
Identification
Deposit ID10077524
MRDS IDW025220
Alternate namesAnchor Lode
RegionNA
Data scoreB
Coordinates40.79568, -122.20915
References
ALBERS, J. P., AND ROBERTSON, J. F., 1961 , GEOLOGY AND ORE DEPOSITS, EAST SHASTA COPPER - ZINC DISTRICT SHASTA COUNTY, CALIF.; GEOLOGICAL SURVEY PROFESSIONAL PAPER 338 , PG. 88 - 100