Transfer of sulfur and chalcophile metals via sulfide-volatile compound drops in the Christiana-Santorini-Kolumbo volcanic field
Efficient transfer of S and chalcophile metals through the Earth’s crust in arc systems is paramount for the formation of large magmatic-hydrothermal ore deposits and can strongly affect the Earth’s climate. The formation of sulfide-volatile compound drops has been recognized as a potential key mechanism for such transfer but their fate during dynamic arc magmatism remains cryptic. We report evidence of compound drops preserved in the active Christiana-Santorini-Kolumbo volcanic field. The observed compound drops are micrometric sulfide blebs associated with vesicles trapped within silicate phenocrysts. The compound drops accumulate and coalesce at mafic-felsic melt interfaces where larger sulfide ovoids form. These ovoids are subsequently oxidized to magnetite during sulfide-volatile interaction. Comparison of metal concentrations between the sulfide phases and magnetite allows for determination of element mobility during oxidation. The formation and evolution of compound drops is an efficient mechanism for transferring S and chalcophile metals into shallow magmatic-hydrothermal arc systems.
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Author
Clifford Patten1, Simon Hector2, Stephanos Kilias3, Marc Ulrich4, Alexandre Peillod2, Aratz Beranoaguirre2, Paraskevi Nomikou3, Elisabeth Eiche5, Jochen Kolb2Institutionen
1Institute of Mineralogy and Petrography, University of Innsbruck, Austria; 2Chair for Geochemistry and Economic Geology, Institute of Applied Geosciences (AGW), Karlsruhe Institute of Technology, Germany; 3Department of Geology and Geoenvironment, National and Kapodistrian University of Athens, Greece; 4Institut Terre et Environnement de Strasbourg, Université de Strasbourg, CNRS, France; 5Chair for Geochemistry and Economic Geology, Institute of Applied Geosciences (AGW), Karlsruhe Institute of Technology, Germany;Laboratory of Environment and Raw materials Analysis (LERA), AGW, Karlsruhe Institute of Technology, GermanyVeranstaltung
GeoSaxonia 2024Datum
2024DOI
10.48380/f1hd-0f04
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