Commodities
PrimaryLead, Copper, Silver, Gold
SecondaryZinc
TertiaryManganese
Commodity typeM
Deposit
Deposit sizeS
WorkingsUnderground
Ore controlSee Comments
Materials
Ore mineralsBornite, Chalcocite, Galena, Pyrite, Sphalerite, Tennantite
GangueJasper, Quartz
Geology
Host rockAndesite · Rawley Andesite
Associated rockAndesite · 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 production1946
Identification
Deposit ID10012565
MRDS IDD008247
RegionNA
Data scoreB
Coordinates38.30195, -106.12949
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.BURBANK (1932) AS COMPILED FROM U.S. GOVT. RECORDS; COLO. DIV. MINES ANN. OPERATORS REPTS.