Thu. May 25, 2023 9:00 AM - 10:30 AM 301B (International Conference Hall, Makuhari Messe)

convener:Bjorn Mysen(Geophysical Laboratory, Carnegie Inst. Washington), Eiji Ohtani(Department of Earth and Planetary Materials Science, Graduate School of Science, Tohoku University), Naoko Takahashi(Graduate School of Science, The University of Tokyo), Chairperson:Naoko Takahashi(Graduate School of Science, The University of Tokyo)

The formation and evolution of the Earth are governed by mass and energy transport processes. Magma and fluid are the main transport agents whose properties characterize those processes. This session will address experimental results and natural observations needed to describe transport processes in the Earth's interior. Transport properties of magma and fluid are controlled by their composition, temperature, and pressure. Composition of magma and fluid is controlled by element partitioning between minerals, magma, and fluid. Chemical composition, in turn, affects partial melting and crystallization processes as well as physical properties including equation-of-state and rheology. Those properties vary with temperature, pressure, chemical composition, and type and proportion of volatiles. Transport processes governed by such chemical and physical properties include magma and fluid formation at depth and their ascent toward the surface. Transport processes of magma and fluid are imaged globally and locally by geophysical observations such as seismic tomography and electrical conductivity profiles. Magma sources and plumbing systems in the mantle and crust and their transport toward the surface are also imaged by those geophysical tools together with geochemical properties that, in turn, affect the geophysical properties. From such information, a three-dimensional structure of current and past magma and fluid plumbing systems can be described. The session will focus on those phenomena, which include properties and processes of magma and fluid, as well as geophysical imaging and geochemical mapping of the Earth's interior at scales from local to global. Presentations can include results of laboratory experiments, numerical modeling, and observations using geophysical and geochemical approaches. Contributions to any of these subjects are encouraged. The Commission of Physics of Minerals of the International Mineralogical Association (CPM-IMA) sponsors this session.