Huancavelica
Producer

Julcani Mining District

Huancavelica, Peru
SilverLeadTungstenGoldBismuthCopperZincAntimonyArsenic
⌖ Show on mapUSGS source ↗
Commodities
PrimarySilver, Lead
SecondaryTungsten, Gold, Bismuth, Copper
TertiaryZinc, Antimony, Arsenic
Commodity typeM
Deposit
Deposit typeFISSURE VEINS, EPITHERMAL
Deposit sizeY
Ore controlSOUTHWEST DIPPING VEINS ARE IN ECHELON STRUCTURES WITH FAIRLY CONTINUOUS MINERALIZATION, WHEREAS THE VEINS THAT DIP NORTHEAST ARE MINERALIZED MAINLY NEAR THE INTERSECTION WITH OTHER SETS. METALS SEEM TO BE ZONED, WITH GOLD AND SILVER ORES MORE ABUNDANT NEAR THE SURFACE, SUCCEEDED DOWNWARD BY SILVER-BISMUTHINITE-COPPER, SILVER-COPPER AND LEAD. SUBTLE CROSSFOLDS AND ZONES OF CLOSE TRANSVERSE FRACTURES OR JOINTING CONTROL ORE DEPOSITION. MINERALIZATION OCCURED WITHIN 0.5 MY OF THE YOUNGEST DOME EMPLACEMENT AND PRIOR TO EMPLACEMENT OF AN ANHYDRITE-BEARING DACITE DIKE. MINERALIZATION REACHED TO WITHIN 200-300 M OF THE PALEO SURFACE.
Geology
StructureANTICLINE (NE TO SW), INTERSECTION OF A NE TO SW FAULT WITH A NW TO SE FAULT., VOLCANIC CENTERS ALONG AXIS OF A BROAD NORTH TRENDING ANTICLINE INTRUDED BY CALC-ALKALIC MAGMAS AND ASSOCIATED VOLCANICS. AT LEAST 6 MINERALIZED CENTERS.
AlterationSERICITIC, SILICIC, ARGILLIC, PYRITIC, PROPYLITIC, ADVANCED ARGILLIC; ALTERATION ZONES HAVE VUGGY QUARTZ CENTER WITH SUCCESSIVE QUARTZ-ALUNITE AND QUARTZ KAOLINITE ENVELOPES., SILICIC; ALTERATION ZONES HAVE VUGGY QUARTZ CENTER WITH SUCCESSIVE QUARTZ-ALUNITE AND QUARTZ KAOLINITE ENVELOPES., ARGILLIC, ADVANCED ARGILLIC
Economic & production
Development statusProducer
First production1937
Discovery year1586
Identification
Deposit ID60001590
MRDS IDW002014
Alternate namesJulcani, Buenaventura's Julcani, Sacramento, Estrella, Lucrecia, Mimosaand Carmencita Mines Formed Julcanic Complex In 1953, Tentadora Added In 1954, Santo Domingo-San Jose Mines, Herminia
RegionSA
Data scoreC
Coordinates-12.96453, -74.80798
References
PERU-MAPA METALOGENETICO, 1969, AND, GUIA PARA EL MAPA METALOGENETICO DEL PERU, SOCIEDAD NACIONAL DE MINERIA Y PETROLEO, LIMA, PERU, NOV. 1969ENGINEERING MINING JOURNAL:INTERNATIONAL DIRECTORY OF MINING AND MINERAL PROCESSING OPERATIONS,1972,PG.200.GOODELL, P.C., AND PETERSEN, ULRICH, 1974, JULCANI MINING DISTRICT, PERU: A STUDY OF METAL RATIOS: ECONOMIC GEOLOGY, V. 69, P. 347-361.PETERSON, ULRICH, NOBLE,D.C., ARENAS, M.J., AND GOODELL, P.C., 1977, GEOLOGY OF THE JULCANI MINING DISTRICT, PERU: ECONOMIC GEOLOGY, V. 72, P. 931-949.PETERSEN, U., 1962, GENESIS OF ORE DEPOSITS IN THE ANDES OF CENTRAL PERU, CERRO DE PASCO CORP., EXPLORATION DIVISION, P. 161-164.MOSIER AND OTHERS, 1986, GEOLOGIC AND GRADE-TONNAGE INFORMATION ON TERTIARY EPITHERMAL PRECIOUS- AND BSE-METAL VEIN DISTRICTS ASSOCIATED WITH VOLCANIC ROCKS: U.S. GEOLOGICAL SURVEY BULLETIN 1666, 39 P.CAVANAGH, J., AND GLOVER, M., 1991, THE PERU REPORT'S GUIDE TO MINES AND MINERS IN PERU: LIMA, PERU, PERU REPORTING SERVICIOS EDITORIALES S.R.L., P. 101-103.LUETH, V.W., GOODELL, P.C., AND PINGITORE, N.E., JR., 1990, ECODING THE EVOLUTION OF AN ORE SYSTEM IN BISMUTHINITE-STIBNITE COMPOSITIONS JULCANI, PERU: ECONOMIC GEOLOGY, V. 85, P. 1462-1472.NOBLE, D.C. AND VIDAL, C.E., 1994, GOLD IN PERU: SEG NEWSLETTER, APRIL 1994, NO. 17, P. 1, 6-13.DEEN, J.A., RYE, R.O., MUNOZ, J.L., AND DREXLER, J.W., 1994, THE MAGMATIC HYDROTHERMAL SYSTEM AT JULCANI, PERU: EVIDENCE FROM FLUID INCLUSIONS AND HYDROGEN AND OXYGEN ISOTOPES: ECONOMIC GEOLOGY, V. 89, NO. 8, P. 1924-1938.