Mine detail: San Francisco Mine

Previously called ''

<< Back to the map

Location

Lat / long:

9.97192, -84.46382

Resource(M)

Primary:	Gold, Silver
Gangue:	Chalcopyrite, Galena, Pyrite, Quartz, Rhodochrosite, Rhodonite, Zeolite
Orebody form:	VEIN

Production

Operation type:	Unknown
Production size:	None
Development status:	Occurrence

Geology

Host rock:	Aguacate Formation
Host type:	Rhyolite
Structure:	Nearly Vertical Fault
Alteration processes:	Silicification, Oxidation, Supergene. In Weathered Zone, Andesite Is Bleached, Kaolinitized, And Limonitized . Fe And Mn Oxides Stain Fractures. Sericite, Pyrite.

References

MRDS	CS00172
DEP	10007934
Reference	{Deposit:: VISITED BY USGS SCIENTISTS, 1986.}{Deposit:: DIRECCION GENERAL DE GEOLOGIA, MINAS E HIDROCARBUROS (DGMH) UNPUBLISHED FILES VIEWED 1986.}{Deposit:: U.S. GEOLOGICAL SURVEY, DIRECCION GENERAL DE GEOLOGIA, MINAS E HIDROCARBUROS, UNIVERSIDAD DE COSTA RICA, 1987, MINERAL RESOURCE ASSESSMENT OF THE REPUBLIC OF COSTA RICA: U.S. GEOLOGICAL SURVEY MISCELLANEOUS INVESTIGATION SERIES MAP I-1865, 75 P.}
Reporter	Howe, Stephen S.; Bagby, William C.; Cox, Dennis P., Marsh, Sherman P., Mosier, Dan