Mine detail: La Libertad Area

Previously called 'El CalvarioEl TigreSan JuanChamarro OestesEsmeralda OesteEsmeralda EsterVictonaSanta ManaPopularesDesconocidaVeta 3Babilonia ViejoLa TorreBabilonia CrimeaBabilonia NuevaEl SaltoZopiloteArmeniaMojon SwEsmeralda-Victoria ZonesGran BritanniaTres AmigosAsombro ClaimsSantiagoTurquezaExperienciaAdmirableSta. ValentinaIncludes SultanaSanta ElenaEsmeralda StructureChamarro ProspectBabilonia MineSan Juan MineLa LibertadLa MestizaLa JuanitaLos Angeles-AnchuraSan FranciscoEl CorralEl PulpitoEl AsombroMojon Azul'

Location:	Chontales, Nicaragua, North America
Lat / long:	12.21347, -85.16665
dep_id:	60001857
mrds_id:	W702056
Commodity type:	metallic
Major mineral:	Gold
Minor mineral:	Silver
Trace mineral:	Arsenic, Cadmium, Cobalt, Selenium, Manganese, Copper, Tellurium, Zinc, Antimony, Lead
Operation type:	Unknown
Deposit type:	EPITHERMAL VEINS, SHEAR ZONES, VEIN
Production size:	Medium ammount of material produced
Development status:	Producer
alteration:	KAOLINIZATION, SILICIFICATION, PROPYLITIZATION. KAOLINITE-ILLITE-POTASSIUM FELDSPAR-PYRITE ALTERATION ENCOUNTERED IN PROXIMITY TO VEINS. DISTRICT WIDE (REGIONAL) ALTERATION LAUNMONTITE-CHLORITE-CALCITE-QUARTZ. OXIDATION TO 80-100 M.
conc_proc:	CHAMARRO VEIN SECONDARILY ENRICHED DOWN TO 300 FT. PROBABLY SOME SECONDARY ENRICHMENT OF GOLD IN HIGHER LEVELS.
ore_ctrl:	INTERSECTIONS OF NE AND NW STRUCTURAL ELEMENTS POSSIBLY CONTROLLED THE LOCATION OF CALDERA STRUCTURES WHICH IN TURN WERE STRUCTURALLY FAVORABLE FOR THE DEVELOPMENT OF QUARTZ VEINS (A POPULAR THEORY BASED ON VERY LIMITED FIELD EVIDENCE). PROBABLY CONTROLLED BY REGIONAL LINEAMENTS BUT NOT CALDERA STRUCTURE.
Structure:	NW-SE NORMAL FAULTS, NE FABRIC, VEIN ELONGATION OF INTRUSIVES AND FRACTURES.
disc_yr:	1843
References:	Deposit:: INSTITUTO CENTROAMERICANO DE INVESTIGACION Y TECNOLOGIA INDUSTRIAL (ICAITI), 1970, MAPA METRALOGENETIO DE AMERICA CENTRAL; 1:2000000 AND ESTUDIOS METALOGENETICOS DE AMERICA CENTRAL: PUBLICIONES GEOLOGICAS DEL ICAITI NUMERO III, 76 P. Deposit:: MINING JOURNAL, LONDON, AUGUST 23, 1991, V. 317, NO. 8136, P. 135. Deposit:: ROBERTS, R.J., AND IRVING, E.M., 1957, MINERAL DEPOSITS OF CENTRAL AMERICA: U.S. GEOLOGICAL SURVEY BULLETIN 1034, P. 189. Deposit:: DARCE, MAURICIO, 1987, GEOLOGIA DEL DISTRITO MINERO LA LIBERTAD, NICARAGUA: REVISTA GEOL. AMER. CENTRAL, VOL. 7, P. 65-82. Deposit:: KONDAKOV, L.A., AND NABROVERKOV, O.S., 1983, OCNOVPYYE CHERTY METALOGENII NIKARAGUA (PRINCIPAL CHARACTERISTICS OF THE METALLOGENY OF NICARAGUA): IZVESTIYA AKADEMII NAUK SSSR, SERIYA GEOLOGICHESKAYA, V. 1983, P. 91-104. Deposit:: ANACONDA FILES (85001) DATE 1/58. Deposit:: LILLJEQUIST, ROBERT, AND HODGSON, GLEN, 1983, STRUCTURES AND ROCK FORMATIONS RELATED TO PRECIOUS METALVEIN DEPOSITS IN NICARAGUA: MANAGUA, NICARAGUA, INMINE. Deposit:: SUNDBLAD, KRISTER, 1985, TRACE ELEMENT DISTRIBUTION IN THE NICARGUA AURIFEROUS DEPOSITS - A RECONAISSANCE STUDY: MANAGUA, NICARAGUA, SOAB, 12 P. Deposit:: U.S. EMBASSY MANAGUA, 1993, A LOOK AT NICARAGU* MINING SECTOR: DEPARTMENT OF STATE CABLE, 8/93. Deposit:: ANON., 1994, TWO NEW MINES ON TRACK FOR GREENSTONE: THE NORTHERN MINER., V. 80, NO. 36, P. 15. Deposit:: JENKINS, D.M., 1989, REPORT ON THE LA LIBERTAD-SANTO DOMINGO DISTRICT CHONTALES PROVINCE, NICARAGUA, JUNE 23, 1989: UNPUBLISHED REPORT, 28 P.