Commodities
PrimaryLead, Silver, Copper
SecondaryGold, Zinc
TertiaryManganese
Commodity typeM
Deposit
Deposit sizeS
Ore controlSee Comments
Materials
Ore mineralsGalena, Pyrite, Sphalerite, Tennantite
GangueChlorite, Quartz
Geology
Host rockAndesite · Rawley Andesite;Rawley Andesite
Associated rockLatite,Andesite · Rawley Andesite;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 Jaspjasper 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
Identification
Deposit ID10013073
MRDS IDD009165
RegionNA
Data scoreB
Coordinates38.31084, -106.13143
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.