ECONOMIC GEOLOGY
and the
Bulletin of the Society of Economic Geologists
Volume 100 May 2005 Number 3


100th Anniversary Special Paper
On Hydrothermal Convection Systems and the Emergence of Life
Michael J. Russell, Allan J. Hall, Adrian J. Boyce, and Anthony E. Fallick    pp. 419-438
Abstract

Siderophile and Chalcophile Metal Variations in Flood Basalts from the Siberian Trap, Noril'sk Region: Implications for the Origin of the Ni-Cu-PGE Sulfide Ores
Peter C. Lightfoot and Reid R. Keays    pp. 439-462
Abstract

Geology and Genesis of the Multistage High-Sulfidation Epithermal Pascua Au-Ag-Cu Deposit, Chile and Argentina
Annick Chouinard, Anthony E. Williams-Jones, Robert W. Leonardson, C. Jay Hodgson, Pedro Silva, Carlos Téllez, Javier Vega, and Fernando Rojas    pp. 463-490
Abstract

Porphyry Copper Deposits Density
Donald A. Singer, Vladimir I. Berger, W. David Menzie, and Byron B. Berger    pp. 491-514
Abstract

Clay Alteration Associated with Proterozoic Unconformity-Type Uranium Deposits in the East Alligator Rivers Uranium Field, Northern Territory, Australia
D. Beaufort, P. Patrier, E. Laverret, P. Bruneton, and J. Mondy    pp. 515-536
Abstract

Uranium Deposits of the Mount Isa Region and Their Relationship to Deformation, Metamorphism, and Copper Deposition
Melissa J. Gregory, Andy R. Wilde, and Peter A. Jones    pp. 537-545
Abstract

Numerical Heat and Fluid-Flow Modeling of the Panorama Volcanic-Hosted Massive Sulfide District, Western Australia
Christian Schardt, Jianwen Yang, and Ross Large    pp. 547-566
Abstract


Scientific Communications

Relative and Absolute Timing of Gold Mineralization Along the Meliadine Trend, Nunavut, Canada: Evidence for Paleoproterozoic Gold Hosted in an Archean Greenstone Belt
Robert L. Carpenter, Norman A. Duke, Hamish A. Sandeman, and Richard Stern    pp. 567-576
Abstract

Structural Controls on the Archean Troilus Gold-Copper Deposit, Quebec, Canada
S. Goodman, A. E. Williams-Jones, and P. Carles    pp. 577-582
Abstract

Zinc Isotope Variation in Hydrothermal Systems: Preliminary Evidence from the Irish Midlands Ore Field
J. J. Wilkinson, D. J. Weiss, T. F. D. Mason, and B. J. Coles    pp. 583-590
Abstract


Discussion and Reply

Formation of a Paleothermal Anomaly and Disseminated Gold Deposits Associated with the Bingham Canyon Porphyry Cu-Au-Mo System, Utah (v. 99, no. 4, pp. 789-806) - A Discussion
R. D. Presnell and W. T. Parry    pp. 591-593

Formation of a Paleothermal Anomaly and Disseminated Gold Deposits Associated with the Bingham Canyon
Porphyry Cu-Au-Mo System, Utah (v. 99, no. 4, pp. 789-806) - A Reply
C. G. Cunningham, G. W. Austin, C. W. Naeser, R. O. Rye, G. H. Ballantyne, R. G. Stamm, and C. E. Barker    pp. 594-595


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