1. CO2-fluxing collapses metal mobility in magmatic vapour
- Author
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Art.A. Migdisov, Vincent J. van Hinsberg, Kim Berlo, and Anthony E. Williams-Jones
- Subjects
Aqueous solution ,Drop (liquid) ,Geochemistry ,chemistry.chemical_element ,Geology ,medicine.disease ,Copper ,Metal deposition ,Metal ,Magmatic water ,chemistry ,Geochemistry and Petrology ,visual_art ,medicine ,visual_art.visual_art_medium ,Environmental Chemistry ,Solubility ,Vapours - Abstract
Magmatic systems host many types of ore deposits, including world-class deposits of copper and gold. Magmas are commonly an important source of metals and ore-forming fluids in these systems. In many magmatic-hydrothermal systems, low-density aqueous fluids, or vapours, are significant metal carriers. Such vapours are water-dominated shallowly, but fluxing of CO2-rich vapour exsolved from deeper magma is now recognised as ubiquitous during open-system magma degassing. Furthermore, we show that such CO2-fluxing leads to a sharp drop in element solubility, up to a factor of 10,000 for Cu, and thereby provides a highly efficient, but as yet unrecognised mechanism for metal deposition.
- Published
- 2016
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