Commodities
PrimaryTungsten, Silver, Copper, Gold
SecondaryLead, Molybdenum, Zinc
Commodity typeM
Deposit
Deposit typeVEINS
Deposit sizeY
Ore controlTHE VARIOUS VEINS ARE DISCUSSED BRIEFLY BELOW. THE PUCAPAMPA PROSPECT ORE CONSIST OF QUARTZ WITH WOLFRAMITE AND A LITTLE MOLYBDENITE; CONTAINED 0.2-2.6% TUNGSTEN TRIOXIDE, AVERAGING 1.1%. THE YURAVILCA VEIN CONTAINS PYRRHOTITE, PYRITE, ARSENOPYRITE, TETRA
Geology
StructureTHE OLDEST ROCKS OF THE DISTRICT ARE 200 M. OR SO OF BLACK SHALE WITH INTERBEDDED QUARTZITE, OF LATE JURASSIC AGE (PAMPAS FORMATION, SO CALLED). THEY ARE OVERLAIN BY MORE THAN 100 M OF WHITE QUARTZITE AND BLACK CARBONACEOUS SHALE, WITH COAL BEDS 50-150 CM THICK, OF EARLY CRETACEOUS AGE. THE SEDIMENTARY ROCKS ARE INTRICATELY FOLDED AND AT CAHUACONA AND NORTH AND EAST OF CHOQUEBAMBA WERE INTRUDED BY GRANODIORITE AND LATER BY ANDESITE. AT GRANODIORITE CONTACTS, SHALE MAY CONTAIN CHIASTOLITE PRISMS. THE ENTIRE DISTRICT LIES A FEW KM EAST OF THE CORDILLERA BLANCA GRANODIORITE APOPHYSIS OF THE COASTAL BATHOLITH. THE ORE DEPOSITS SEEM TO BE ZONED ROUGHLY AROUND THE ANDESITE INTRUSIVE OF CAHUACONA, WITH COPPER NEAR THE ANDESITE AND LEAD FARTHER OUT. ORE DEPOSITS ARE BANDED FISSURE VEINS WHICH TEND TO RAMIFY NEAR THE SURFACE AND CONTAIN LITTLE OR NO GANGUE.
Economic & production
Development statusProducer
First production1882
Identification
Deposit ID60001613
MRDS IDW002268
RegionSA
Data scoreD
Coordinates-8.58131, -77.74146
References
SIMONS, FRANK, 1960 UNPUBLISHED REPORT, P. 993PERU-MAPA METALOGENETICO, 1969, AND, GUIA PARA EL MAPA METALOGENETICO DEL PERU, SOCIEDAD NACIONAL DE MINERIA Y PETROLEO, LIMA, PERU, NOV. 1969