Minerals in Subduction Zone
Tracking subduction-zone fluids via minerals: Advances in natural and experimental approaches
Co-Conveners
Ryo Fukushima, Kochi Institute for Core Sample Research, JAMSTEC
Yongsheng Huang, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences
Jesse B. Walters, NAWI Graz Geocenter, University of Graz
Tatsuki Tsujimori, Department of Earth Science, Tohoku University
Supercritical fluids play critical roles in global mass cycling and geodynamic processes within subduction zones. Field observations from high-pressure and ultrahigh-pressure orogenic belts along convergent margins reveal pervasive fluid flow, extensive fluid-rock interactions, and clear relationships between rock deformation and fluid migration. Isotopic analyses of minerals in slab-derived metamorphic rocks and associated mantle materials provide key constraints on deep-sourced fluid origins. Recent advances in thermodynamic datasets for high-pressure fluids now enable more refined characterization of aqueous fluid compositions, while high-pressure and high-temperature experimental simulations offer valuable insights into fluid distribution and inventory in Earth's interior. Improved understanding of fluid distribution, migration mechanisms, and their geochemical-geophysical responses enhances our knowledge of global material cycles and geodynamics.
This session highlights recent advances in understanding fluid properties and behavior in subduction zones, particularly encouraging contributions that investigate fluid chemistry, fluid-rock reaction kinetics, and fluid migration mechanisms across scales (meter to nanometer) through petrological, geochemical, experimental, tectonic, and numerical modeling approaches, aiming to foster interdisciplinary collaboration in subduction zone research.
