Mine detail: San Francisco Mine

Previously called ''

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Location

Lat / long:

38.11612, -105.35807

Resource(M)

Primary:	Silver
Discovery year:	1882

Production

Operation type:	Underground
Deposit type:	Vein
Production size:	Small
Development status:	Past Producer

Geology

Host rock:	Bunker Trachyandesite;Game Ridge Trachyte
Host type:	Trachyandesite
Structure:	Rosita Volcanic Center, Wet Mtns, Two Faults (Veins) Intersect At Nearly Right Angles; Other Faults In Area
Tectonic:	Central Cordillera (Southern Rocky Mtns)
Alteration processes:	Weakly Argillized At Junction Of Two Veins

References

MRDS	D007681
DEP	10012206
Reference	{Deposit:: CROSS, WHITMAN, 1896, GEOLOGY OF SILVER CLIFF AND THE ROSITA HILLS COLORADO: USGS 17TH ANN. REPORT, PT. 2, P. 263-403}{Deposit:: EMMONS, S.F., 1896, THE MINES OF CUSTER COUNTY, COLORADO: USGS 17TH ANN. REPORT, PT 2, P. 405-472.}{Deposit:: SHARP, W.M., 1978, GEOLOGIC MAP OF THE SILVER CLIFF AND ROSITA VOLCANIC CENTERS, CUSTER COUNTY, COLORADO: USGS MAPS I-1081.}
Reporter	Collins, Donna B.