Commodities
PrimaryGold, Silver
TertiaryCopper, Lead, Tellurium
Commodity typeM
Deposit
Deposit typeVein
Model85: Polymetallic veins
Deposit sizeS
Materials
Ore mineralsChalcopyrite, Galena
GangueBarite, Chalcedony, Garnet, Hematite, Magnetite, Quartz
Geology
Host rockMudstone,Shale,Sandstone,Conglomerate · Cutler Formation;Dolores Formation
Associated rockDiorite · Porphyritic Rocks--Diorite-Monzonite Porphyry;Nonporphyritic Rocks--Diorite
StructureSan Juan Uplift, Four Corners Platform, La Plata Dome, Diorite Peak Stock
Tectonic settingCentral Cordillera (Southern Rocky Mtns)
AlterationSilicification, Kaolinitization, Chloritization
Economic & production
Development statusPast Producer
First production1900
Last production1939
Discovery year1895
Identification
Deposit ID10101870
MRDS IDD010804
RegionNA
Data scoreB
Coordinates37.4364, -108.05704
References
ECKEL, E.B., AND OTHERS, 1949, GEOLOGY AND ORE DEPOSITS OF THE LA PLATA DISTRICT, COLORADO: USGS PROF. PAPER 219, P. 69-70, 93-96, 171.BECKER, C.M., 1934, REPORT ON THE TOMAHAWK AND BLACK DIAMOND PROPERTIES, SAN JUAN DISTRICT, LA PLATA COUNTY, COLORADO: UNPUB. ENG. REPT., 5P.MCCAUSLAND, ROSS, 1936, TOMAHAWK-BLACK DIAMOND MINES, DURANGO, COLORADO: UNPUB. ENG. REPT., 22 P.COLORADO DIV. MINES INF. REPT.ECKEL AND OTHERS, 1949, P. 94 (AS COMPLIED FROM USBM RECORDS).