Commodities
PrimarySilver, Gold
TertiaryLead, Manganese, Copper, Zinc
Commodity typeM
Deposit
Deposit sizeS
WorkingsUnderground
Ore controlBreccia Pipe And Fault Zone In Small Stock
Materials
Ore mineralsCerargyrite, Gold, Wad
GangueBeidellite, Magnetite, Malachite, Quartz
Geology
Host rockQuartz Latite · Biedell Quartz Latite
Associated rockQuartz Latite · Biedell Quartz Latite
StructureSan Juan Volcanic Field, Rio Grande Rift, Biedell-Klondike Fault, Esperanza Fault Zone, Biedell Stock
Tectonic settingCentral Cordillera (Southern Rocky Mtns)
AlterationPervasive Propylitization; Locally Intense Argillization; Kaolinitization, Silicification
Economic & production
Development statusPast Producer
Last production1920
Discovery year1884
Identification
Deposit ID10101769
MRDS IDD008932
Alternate namesEsperanza, Valardena, Jesus Marie
RegionNA
Data scoreB
Coordinates37.94584, -106.3056
References
COE, H.S., 1922, ON RECONNAISSANCE EXAMINATION OF THE ESPERANZA MINE, SAGUACHE MINE, SAGUACHE COUNTY, COLORADO: COLORADO DIV. MINES UNPUB. ENG. REPT.NICKEL, G.D., 1922, DESCRIPTION OF ESPERANZA MINE: UNPUB. REPT. IN COLORADO DIV. MINES FILESLARSEN, E.S., JR., AND CROSS, WHITMAN, 1956, GEOLOGY AND PETROLOGY OF THE SAN JUAN REGION, SOUTHWESTERN COLORADO: USGS PROF. PAPER 258, P. 83-86.OSTERWALD, E.J., 1977, THE BEIDELL AND SANDERSON VOLCANIC CENTERS, SAGUACHE COUNTY, COLORADO: COLORADO STATE UNIV. M.S. THESIS, 145 P.