 | | Journal (article/letter/editorial) | | Silver-Rich Polymetallic Veins of the Castrovirreyna District, Central Peru: Fault Growth and Mineralization...undulatory silver veins of the Castrovirreyna district, central Peru, formed in a dilatant, anastamosing...those at Castrovirreyna. For example, there are anastamosing faults and veins in the Creede district, Colorado...Colorada district, Mexico, is highly curved (Albinson, 1988); and veins of the Fresnillo district, Mexico...between faults and are important for exploration and mining of vein-type ore deposits. Bends and other irregularities |  | | Report (issue) | | 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...vestermaost veins at la Virreyna* In tha center of the district, around Caudalosa, lead sulfantiiaonldas are the |  | | Report (volume) | | in the development of Labrador-Quebec iron ore district, by J. K. Gustafson and A. B. Moss: Engenharia...W. D. Johnston, Jr., and F. M. de Vasconcelos: Mining Mag., v. 72, no. 6, p. 374-375, London, 1945. Manganese...report on manganese deposits in the Serra do Navio district, Territory of Amapa, Brazil, by J. V. N. Dorr...1949. Manganese deposits of the Serra do Navio district, Territory of Amapa, Brazil, by J. V. N. Dorr...14-17, figs. 6-38, 1950. Ores and mining in the Itabira iron district, Brazil [abs.}, by Gilbert Whitehead |
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