Modeling the formation of porphyry-copper ores




Porphyry-copper ore systems, the source of much of the world's copper and molybdenum, form when metal-bearing fluids are expelled from shallow, degassing magmas. On page 1613 of this issue, Weis et al. (1) demonstrate that self-organizing processes focus metal deposition. Specifically, their simulation studies indicate that ores develop as consequences of dynamic variations in rock permeability driven by injection of volatile species from rising magmas. Scenarios with a static permeability structure could not reproduce key field observations, whereas dynamic permeability responses to magmatic-fluid injection localized a metal-precipitation front where enrichment by a factor of 103 could be achieved [for an overview of their numerical-simulation model CSMP++, see (2)].
Publication type Article
Publication Subtype Journal Article
Title Modeling the formation of porphyry-copper ores
Series title Science
DOI 10.1126/science.1231706
Volume 338
Issue 6114
Year Published 2012
Language English
Publisher AAAS
Contributing office(s) Branch of Regional Research-Western Region, Volcano Hazards Program
Description 2 p.
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Science
First page 1551
Last page 1552
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