Commodities
PrimarySilver, Copper, Gold, Lead
SecondaryZinc
Commodity typeM
Deposit
Deposit sizeS
Orebody formPINCH AND SWELL
Ore controlSee Comments
Materials
Ore mineralsChalcopyrite, Galena, Pyrite, Sphalerite, Tennantite
Geology
Host rockLatite · Bonanza Tuff
Associated rockLatite · Bonanza Tuff
StructureSawatch Range, San Juan Volcanic Field, Rio Grande Rift, Bonanza Caldera
Tectonic settingCentral Cordillera (Southern Rocky Mtns.)
AlterationEarly Barren Stage Of Alteration By Fumarolic Or Acid-Hot Spring Activity Resulted In Intense Silicification, Wallrock Replacement By Jasper And Alteration Products Hematite, Diaspore, Alunite, Barite, Zunyite, Rutile, And Kaolin Minerals. Later Mineralizing Stage By Alkaline Or Neutral Solutions Deposited Ore And Gangue And Caused Micaceous Alteration (Sericite And Chlorite) And Calcite, Quartz, And Pyrite.
Economic & production
Development statusPast Producer
Last production1926
Identification
Deposit ID10012533
MRDS IDD008197
RegionNA
Data scoreB
Coordinates38.3114, -106.15143
References
PATTON, H.B., 1916, GEOLOGY AND ORE DEPOSITS OF THE BONANZA DISTRICT, SAGUACHE COUNTY, COLORADO: COLORADO GEOLOGICAL SURVEY BULL. 9, 136 P.BURBANK, W.S., 1932, GEOLOGY AND ORE DEPOSITS OF THE BONANZA MINING DISTRICT, COLORADO: USGS PROF. PAPER 169, 166 P.