Mine detail: Bonanza District

Previously called ''

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Location

Lat / long:

38.29471, -106.1425

Resource(M)

Primary:	Lead, Gold, Copper, Silver
Secondary:	Manganese, Zinc
Tertiary:	Titanium, Bismuth, Antimony, Tellurium
Discovery year:	1879

Production

Operation type:	Unknown
Deposit type:	FISSURE VEINS
Production size:	Small
Development status:	Occurrence
First production started:	1880
Last production ended:	1969

Geology

Structure:

BONANZA CALDERA, SAWATCH RANGE, SAN JUAN VOLCANIC FIELD, RIO GRANDE RIFT

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	D009181
DEP	60000327
Reference	{Deposit:: PATTON, H.B., 1916, GEOLOGY AND ORE DEPOSITS OF THE BONANZA DISTRICT, SAGUACHE COUNTY, COLORADO: COLORADO GEOL 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.}