Metals, Minerals, and Society
Chapter 12: Geologic Controls on Hypogene Mineralization at the Zaldívar Porphyry Copper-Gold-Molybdenum Deposit, Escondida District, Northern Chile
Published:January 01, 2018
José Perelló, Aquiles González, Cristian Monroy, 2018. "Geologic Controls on Hypogene Mineralization at the Zaldívar Porphyry Copper-Gold-Molybdenum Deposit, Escondida District, Northern Chile", Metals, Minerals, and Society, Antonio M. Arribas R., Jeffrey L. Mauk
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The porphyry copper mineralization at the Zaldívar deposit is confined to a NE-striking corridor of early- and late-intermineral granodioritic and dacitic porphyry intrusions and associated magmatic-hydrothermal breccia bodies. Country rocks comprise Early Permian rhyolite and andesite of La Tabla Formation plus comagmatic granitoids and Late Triassic andesite dikes. Middle Eocene andesitic rocks are common but of ill-defined distribution. Hydrothermal alteration consists of centrally located, magnetite-bearing potassic assemblages that are partially to completely overprinted by chlorite-epidote and sericitic alteration zones. The bulk of the hypogene metal resource was introduced synchronously with potassic alteration and A- and B-type veinlets during emplacement...