Mine detail: Bonanza Mine

Previously called 'BonanzaBonanza No. 1Cornucopia Claims'

<< Back to the map

Location

Lat / long:

38.31279, -106.14949

Resource(M)

Primary:	Lead, Copper, Silver, Zinc
Secondary:	Gold
Tertiary:	Manganese, Titanium, Metal
Ore:	Chalcopyrite, Galena, Pyrite, Sphalerite, Stromeyerite, Tennantite
Gangue:	Anatase, Apatite, Barite, Fluorite, Limonite, Quartz, Rhodochrosite, Rhodonite, Rutile
Discovery year:	1880

Production

Operation type:	Unknown
Production size:	Small
Development status:	Past Producer
First production started:	1883
Last production ended:	1954

Geology

Host rock:	Bonanza Tuff;Rawley Andesite
Host type:	Latite,Andesite
Associated rock:	Bonanza Tuff;Rawley Andesite
Associated type:	Latite,Andesite
Structure:	Bonanza Caldera, Sawatch Range, San Juan Volcanic Field, Rio Grande Rift
Tectonic:	Central Cordillera (Southern Rocky Mtns.)
Alteration processes:	Early 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.

References

MRDS	D008246
DEP	10012564
Reference	{Deposit:: PATTON, H.B., 1916, GEOLOGY AND ORE DEPOSITS OF THE BONANZA DISTRICT, SAGUACHE COUNTY, COLORADO: COLORADO GEOLOGICAL SURVEY BULL. 9, 136 P.}{Deposit:: BURBANK, W.S., 1932, GEOLOGY AND ORE DEPOSITS OF THE BONANZA MINING DISTRICT, COLORADO: USGS PROF. PAPER 169, 166 P.}{Production:: BURBANK (1932), AS COMPILED FROM USGS AND USBM RECORDS; COLO. DIV.MINES ANN. OPERATORS REPTS}
Reporter	Schwochow, Stephen D.