Economic Geology, 2001, V 96, N 2, March-April.

A Special Issue Devoted to Porphyry Copper Deposits of Nothern Chile
John H. Dilles and Francisco Camus, Editors

Preface Francisco Camus and John H. Dilles 233 Aeromagnetic Signature of Porphyry Copper Systems in Northern Chile and Its Geologic Implications Gerardo Behn, Francsico Camus, Pedro Carrasco, and Hunter Ware 239 Geology of the Chuquicamata Mine: A Progress Report Guillermo Ossandón C., Roberto Fréraut C., Lewis B. Gustafson, Darryl D.Lindsay, and Marcos Zentilli 249 Geologic Evolution of the Escondida Area, Northern Chile: A Model for Spatial and Temporal Localization of Porphyry Cu Mineralization Jeremy P. Richards, Adrian J. Boyce, and Malcolm S. Pringle 271 Geology of the Escondida Porphyry Copper Deposit, Antofagosta Region Chile Ruben A. Padilla Garza, Spencer R. Titley, and Francisco Pimental B. 307 Multiple Centers of Mineralization in the Indio Muerto District, El Salvador, Chile Lewis B. Gustafson, Walter Orquera, Michael McWilliams, Mario Castro, Osman Olivares, Gonzalo Rojas, Juan Maluenda, and Marcello Mendez 325 Chronology of Exotic Mineralization at El Salvador, Chile, by 40Ar/39Ar Dating of Copper Wad and Supergene Alunite Timothy I. Mote, Tim A. Becker, Paul Renne, and George H Brimhall 351 Application of Mass-Balace Modeling of Sources, Pathways, and Sinks of Supergene Enrichment to Exploration and Discovery of the Quebrada Turquesa Exotic Copper Orebody, El Salvador District, Chile 367 Timothy I. Mote, George Brimhall, Enrique Tidy-Finch, Guillermo Muller, and Pedro Carrasco Oxide Mineralization at the Radomiro Tomic Porphyry Copper Deposit, Northern Chile Patricio Cuadro C. and Gonzalo Rojas S. 387 Atacamite Inclusion in Rock Forming Feldspars and Copper-Bearing Smectites from the Radomiro Tomic Mine, Chile: Copper Insoluble Mineral Occurrences George H. Brimhall, Beatriz Levi, Jan Olov Nystörm, and Enrique Tidy F. 401