[E] Oral

S (Solid Earth Sciences ) » S-IT Science of the Earth's Interior & Tectonophysics

[S-IT19] Role of melts, fluids, and volatile-bearing minerals in Earth and planetary dynamics

Sun. May 24, 2026 9:00 AM - 10:30 AM Exhibition Hall Special Setting (8) (Exhibition Hall 7&8, Makuhari Messe)

Chairperson:Fukushima Ryo(Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology), HUANG Yongsheng(Guangzhou Institute of Geochemistry, Chinese Academy of Sciences), Ohtani Eiji(Department of Earth Science, Graduate School of Science, Tohoku University), Takahashi Naoko(Department of Earth Science, Graduate School of Science, Tohoku University), Codillo Emmanuel(Carnegie Institution for Science)

Melts and fluids are fundamental agents of mass and heat transport in the Earth's interior, governing its dynamics, including crust formation and evolution, volcanic and seismic activities, ore genesis, and volatile-mediated global material cycling. Their physicochemical properties, controlled by pressure, temperature, composition, and oxygen fugacity, directly influence partial melting, crystallization, element partitioning, isotope fractionation, rock and mineral rheology, seismic wave velocity, and electrical conductivity. An understanding of the behavior and roles of melts, aqueous fluids, and volatile-bearing minerals is essential for connecting surface to deep Earth processes, refining models of planetary evolution, and assessing implications for habitability.
This session aims to bring together scientists from diverse disciplines to discuss how melts, aqueous fluids, and volatile-bearing minerals influence properties and processes in the Earth and planetary interiors, from the crust to the deep mantle, across all spatial and temporal scales. We welcome contributions from novel laboratory experiments, geophysical observations, petrological and geochemical analyses, and computational simulations, and especially encourage interdisciplinary studies. Contributions from early-career researchers are particularly encouraged. We also welcome presentations from the communities of the Commission of Physics of Minerals of the International Mineralogical Association (CPM-IMA) and the Study of Earth Deep Interior (SEDI-J).

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9:00 AM - 9:15 AM

[SIT19-01] Haplogranite Haplogranite Solubility in Hydrothermal Fluids Observed Using Hydrothermal Diamond Anvil Cell (HDAC) Experiments

★Invited Papers

*Michael R Ackerson¹, Bjorn O Mysen (1. Smithsonian National Museum of Natural History)

9:15 AM - 9:30 AM

[SIT19-02] Structural evolution of water-bearing rhyolitic magmas in deep-mantle: A view from NMR

*Narangoo Purevjav¹, Jin Jung Kweon¹, Seoyoung Lee¹, Elias El Ghazaoui¹, Sung Keun Lee¹ (1. Seoul National University, Republic of Korea)

9:30 AM - 9:45 AM

[SIT19-03] Continuous release of saline fluids from a permeable subducting slab

*Yongsheng HUANG^1,2, Yinwei Li^1,2,3, Kaiwei Tao^1,2,3, Guoji Wu^1,2,3, Duojun Wang³, Yuan Li⁴ (1. State Key Laboratory of Deep Earth Processes and Resources, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China, 2. CAS Center for Excellence in Deep Earth Science, Guangzhou 510640, China, 3. College of Earth and Planetary Sciences, University of the Chinese Academy of Sciences, Beijing 100049, China, 4. Bayerisches Geoinstitut, University of Bayreuth, Bayreuth 95440, Germany)

9:45 AM - 10:00 AM

[SIT19-04] In situ boron isotope analyses identify metasomatic fluids: Examples from Guatemalan eclogite

*Ryo Fukushima^1,2, Tatsuki Tsujimori², Aratz Beranoaguirre³, Axel Gerdes³, Horst R. Marschall³ (1. Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology, 2. Tohoku University, 3. Goethe University Frankfurt am Main)

10:00 AM - 10:15 AM

[SIT19-05] Saturation gradient chemical diffusion revisited: a thermodynamically-consistent numerical and experimental approach

*Cian R Wilson¹, Anne Pommier¹, Ming Hao^1,2, Emma Bullock¹, Michael J Walter¹, Marc W Spiegelman³, Mark Ghiorso⁴ (1. Carnegie Institution for Science, 2. ETH Zurich, 3. Columbia University, 4. OFM Research)

10:15 AM - 10:30 AM

[SIT19-06] A High-Pressure, High-Temperature Synchrotron Facility for Comprehensive Characterization of Geofluids: Linking Structure, Density, Elasticity, and Viscosity

*Yanbin Wang¹, Tony Yu¹, Young Jay Ryu¹, Qi Chen¹, Aaron Wolfgang Ashley², Man Xu³, Zhicheng Jing⁴, Stella Chariton¹, Vitali Prakapenka¹ (1. Center for Advanced Radiation Sources, University of Chicago, Chicago, USA, 2. Laboratory of Magmas and Volcanos, University of Clermont Auvergne, France , 3. Shanghai Advanced Research in Physical Sciences, Shanghai, China, 4. Department of Earth and Space Sciences, Southern University of Science and Technology, Shenzhen, China)

Session information