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Melt inclusions in veins: Linking magmas and porphyry Cu deposits
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At a porphyry copper-gold deposit in Bajo de la Alumbrera, Argentina, silicate melt inclusions coexist with hypersaline liquid- and vapor-rich inclusions in the earliest magmatic-hydrothermal quartz veins. Copper concentrations of the hypersaline liquid and vapor inclusions reached maxima of 10.0 weight % (wt %) and 4.5 wt %, respectively. These unusually copper-rich inclusions are considered to be the most primitive ore fluid found thus far. Their preservation with coexisting melt allows for the direct quantification of important oreforming processes, including determination of bulk partition coefficients of metals from magma into ore-forming magmatic volatile phases.
|Keywords:||fluid inclusions, copper-deposit, vapor, microanalysis, quartz, brine, Chile, Silicate-melt inclusions, porphyry, copper, magmatic-hydrothermal, volatile exsolution|
|Journal or Publication Title:||Science|
|Page Range:||pp. 2109-2111|
An overview of this article (Science Magazine's Perspectives) has been published by Jean Cline (2003): How to Concentrate Copper, Science v. 302 (5653), 2075. [DOI: 10.1126/science.1093202]
|Date Deposited:||08 Aug 2006|
|Last Modified:||18 Nov 2014 03:11|
|Item Statistics:||View statistics for this item|
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