OF THE CASTRDVIRHSYNA LEAD-ZINC-SILVER DEPOSITS, PERU By Richard Wheatley Lewis, Jr. U. S. Geologic-1...nomenclature. ABSTRACT The Castrovirroyna mining district lies in the Andean Cordillera of South Central...Supervene silver ores vere first mined. Currently the district produces about 20,000 tons of laad*sinc ore and...and 50OO tons of silver ore annually* The district: Is underlain by Tertiary andesitlc rocks interbedded...are, front east to vest: San Gaanro, Caudslosa, and la Virreyna. A less liaportant set of veins, sinilarly |