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@article{Nathwani:2024:10.1038/s41467-024-52786-5,
author = {Nathwani, C and Blundy, J and Large, S and Wilkinson, J and Buret, Y and Loader, M and Tavazzani, L and Chelle-Michou, C},
doi = {10.1038/s41467-024-52786-5},
journal = {Nature Communications},
title = {A zircon case for super-wet arc magmas},
url = {http://dx.doi.org/10.1038/s41467-024-52786-5},
volume = {15},
year = {2024}
}
TY - JOUR
AB - 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 <10 ppm) due to a decrease in zircon saturation temperatures with increasing melt H2O. We find that zircon titanium concentrations record a transition to super-wet magmatism in Central Chile immediately before the formation of the world’s largest porphyry copper deposit cluster at Río Blanco-Los Bronces. Broader analysis shows that low, homogeneous zircon titanium concentrations are present in many magmatic systems. Our study suggests that super-wet magmas are more common than previously envisaged and are fundamental to porphyry copper deposit mineralisation.
AU - Nathwani,C
AU - Blundy,J
AU - Large,S
AU - Wilkinson,J
AU - Buret,Y
AU - Loader,M
AU - Tavazzani,L
AU - Chelle-Michou,C
DO - 10.1038/s41467-024-52786-5
PY - 2024///
SN - 2041-1723
TI - A zircon case for super-wet arc magmas
T2 - Nature Communications
UR - http://dx.doi.org/10.1038/s41467-024-52786-5
UR - https://www.nature.com/articles/s41467-024-52786-5
VL - 15
ER -
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