A zircon case for super-wet arc magmas

Chetan Nathwani (), Jon Blundy, Simon J. E. Large, Jamie J. Wilkinson, Yannick Buret, Matthew A. Loader, Lorenzo Tavazzani and Cyril Chelle-Michou
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Chetan Nathwani: ETH Zürich
Jon Blundy: University of Oxford
Simon J. E. Large: South Kensington
Jamie J. Wilkinson: South Kensington
Yannick Buret: South Kensington
Matthew A. Loader: South Kensington
Lorenzo Tavazzani: ETH Zürich
Cyril Chelle-Michou: ETH Zürich

Nature Communications, 2024, vol. 15, issue 1, 1-11

Abstract: Abstract Arc magmas have higher water contents (2-6 wt.% H2O) than magmas generated in other tectonic environments, with a growing body of evidence suggesting that some deep arc magmas may be ‘super-wet’ (>6 wt.% H2O). Here, we use thermodynamic modelling to show that the behaviour of zirconium during magmatic differentiation is strongly sensitive to melt water contents. We demonstrate that super-wet magmas crystallise zircon with low, homogeneous titanium concentrations (75th percentile

Date: 2024
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DOI: 10.1038/s41467-024-52786-5

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