Commodities
PrimaryZinc, Silver, Lead, Copper
SecondaryGold
Commodity typeM
Deposit
Deposit sizeS
Ore controlSee Comments
Materials
Ore mineralsChalcopyrite, Galena, Sphalerite
GangueJasper, Pyrite
Geology
Host rockLatite · Bonanza Tuff;Rawley Andesite
Associated rockLatite,Andesite · Bonanza Tuff;Rawley Andesite
StructureBonanza Caldera, Sawatch Range, San Juan Volcanic Field, Rio Grande Rift
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 production1957
Identification
Deposit ID10012542
MRDS IDD008211
Alternate namesCliff No. 1 Tunnel
RegionNA
Data scoreB
Coordinates38.30195, -106.12477
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.