Commodities
PrimaryLead, Gold, Silver, Zinc
SecondaryCopper
Commodity typeM
Deposit
Deposit sizeS
Ore controlSee Comments
Materials
Ore mineralsGalena, Sphalerite
Geology
Host rockAndesite · Rawley Andesite
Associated rockAndesite · Rawley Andesite
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 production1943
Identification
Deposit ID10101742
MRDS IDD008203
Alternate namesSt. Joseph Mine
RegionNA
Data scoreB
Coordinates38.30168, -106.1431
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.