Pb isotopes of the Hualgayoc area, northern Peru: implications for metal provenance and genesis of a Cordilleran polymetallic mining district Article

Macfarlane, AW, Petersen, U. (1990). Pb isotopes of the Hualgayoc area, northern Peru: implications for metal provenance and genesis of a Cordilleran polymetallic mining district . ECONOMIC GEOLOGY, 85(7), 1303-1327. 10.2113/gsecongeo.85.7.1303

cited authors

  • Macfarlane, AW; Petersen, U

authors

abstract

  • The Hualgayoc district of northern Peru is typical of several Pb-Zn-Ag-Cu deposits in the Peruvian Cordillera in which veins are closely associated with stratiform (manto) orebodies. A comprehensive survey of the isotopic composition of lead in crustal rocks of the Hualgayoc region demonstrates that the Tertiary plutons, which partly host the veins, contain less radiogenic lead than either the Cretaceous sedimentary rocks that host the ores or the regional metamorphic basement rocks believed to underlie the Hualgayoc district. Lead in vein and manto galenas from Hualgayoc is isotopically indistinguishable and coincides with the composition of the Tertiary plutons. The vein and the manto ores thus probably formed from the same solutions. -from Authors

publication date

  • January 1, 1990

published in

Digital Object Identifier (DOI)

start page

  • 1303

end page

  • 1327

volume

  • 85

issue

  • 7