Mine detail: Esperanza Mine

Previously called 'El Libano De Tilaran MineEsperanza De Libano Mine'

<< Back to the map

Location

Lat / long:

10.41773, -84.98606

Resource(M)

Primary:	Gold
Secondary:	Silver
Ore:	Electrum
Gangue:	Calcite, Chalcopyrite, Pyrite, Quartz, Sphalerite
Orebody form:	VEIN

Production

Operation type:	Unknown
Production size:	None
Development status:	Occurrence
First production started:	1910

Geology

Host rock:	Monteverde;Monteverde
Host type:	Andesite
Associated rock:	Monteverde;Monteverde;Monteverde
Associated type:	Rhyolite
Structure:	N- And Ne-Trending Faults
Alteration processes:	Replacement And Veining Of Andesite By Calcite And Epidote; Phenocrysts Replaced By Sericite; Chlorite In Groundmass. Pervasive Silicification.

References

MRDS	CS00121
DEP	10007887
Reference	{Deposit:: BENNETT, EVAN, 1939, GOLD MINING IN COSTA RICA: ENG. MIN. J., V. 140, NO. 1, P. 56-58.}{Deposit:: WILLIAM BENNETT, OWNER, ORAL COMMUNICATION, 1986.}{Deposit:: 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.}
Reporter	Howe, Stephen S. (Cox, Dennis P.), Mosier, Dan