Commodities
PrimaryCopper
SecondarySilver, Gold
TertiaryZinc
Commodity typeM
Deposit
Model184: Massive sulfide, kuroko
Deposit sizeS
Orebody formLENTICULAR
Ore controlFormed By Partial Or Complete Replacement Of A Thin Flow Of Porphyritic Rhyolite That Lies Between A Bed Of Pyroclastic Rock Above And A Flow Of Nonporphyritic Rhyolite Below. Ore Solutions Apparently Stopped By Premineral Foliated Bands Of Gouge And Sericite.
Materials
Ore mineralsChalcopyrite, Galena, Pyrite, Sphalerite
GangueSericite
Geology
Host rockRhyolite
Associated rockRhyolite
StructurePremineral And Postmineral Faults. Evidence For Premineral Age On Faults Nos. 3 , 5 & 12 Is The Pressence Of Pyrite And Pyrite Clasts Filled With Iron Oxide, Along Faults Away From Orebody. All Faulta Except No. 12 Show Postmineral Movement, Horizontal Movements Have Been Suggested To Occur Along Faults No. 2 , 5 & 7 As Well As Vertically.
AlterationHydrothermal, Chloritization
Economic & production
Development statusPast Producer
Production years1908 - 1909 , 1918 - 1919
Identification
Deposit ID10077588
MRDS IDW025290
Alternate namesLost Desert, Trinity
RegionNA
Data scoreB
Coordinates40.73291, -122.49721
References
KINKEL, A. R., HALL, W. E., AND ALBERS, J. P., 1956 , GEOLOGY AND BASE - METAL DEPOSITS OF WEST SHASTA COPPER - ZINC DISTRICT SHASTA COUNTY, CALIF., GEOLOGICAL SURVEY PROFESSIONAL PAPER 285 , PG. 138 - 144KIVEL, ET AL, 1956 , PG. 140 SEE REF.