Mine detail: La Union Mine

Location:	Puntarenas, Costa Rica, North America
Lat / long:	10.15802, -84.72077
dep_id:	10007906
mrds_id:	CS00141
Commodity type:	metallic
Major mineral:	Gold
Minor mineral:	Silver
Operation type:	Unknown
Production size:	No production occurred
Development status:	Occurrence
gangue:	Chalcopyrite, Galena, Pyrite, Quartz, Sphalerite
orebody_fm:	VEIN
work_type:	Unknown
model:	151: Epithermal vein, Sado
alteration:	Silicification Of Andesite Locally Near Quartz Veins And Development Of Chlorite, Sericite, And Calcite With Lt 1 % Disseminated Pyrite.
Reporter:	Howe, Stephen S. (Cox, Dennis P.), Mosier, Dan
hrock_type:	Andesite
arock_type:	Plutonic Rock
References:	Deposit:: REITZ, M. F., 1902, THE GOLD MINES OF COSTA RICA: ENG. MIN. J., V. 74, P. 212. Deposit:: BENNETT, EVAN, 1939, GOLD MINING IN COSTA RICA: ENG. MIN. J., V. 140, P. 56-58. Deposit:: DIRECCION GENERAL DE GEOLOGIA, MINAS E HIDROCARBUROS (DGMH) UNPUBLISHED FILES VIEWED 1986. Deposit:: VISITED BY USGS SCIENTISTS, 1986. ORGANIZACION DE LOS ESTADOS AMERICANOS, 1978, DIAGNOSTICO DEL SECTOR MINERO: SAN JOSE, ORGANIZACION DE LOS ESTADOS AMERICANOS, 91 P. 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.