Tue. May 31, 2022 11:00 AM - 1:00 PM
Online Poster Zoom Room (22) (Ch.22)
convener:Bjorn Mysen(Geophysical Laboratory, Carnegie Inst. Washington), convener:Eiji Ohtani(Department of Earth and Planetary Materials Science, Graduate School of Science, Tohoku University), Naoko Takahashi(Graduate School of Science, Tohoku University), convener:Saeko Kita(International Institute of Seismology and Earthquake Engineering, BRI), Chairperson:Eiji Ohtani(Department of Earth and Planetary Materials Science, Graduate School of Science, Tohoku University)
The principal mass and energy transport agents in the Earth's interior are fluids and magmas. Characterization of their geophysical properties is central to our understanding of crust and mantle processes including seismicity in subduction zones. This session will address results of experiments and natural observations needed to enhance such understanding.
Geophysical properties of fluids and melts are controlled by their chemical composition, temperature, and pressure. The transport processes are governed by the property information. Magma aggregation and fluid formation at depth and their ascent toward the surface are functions of density contrasts and permeability and depend on temperature, pressure, chemical composition and concentration of volatile components such as H2O and CO2.
The transport processes of fluids and magmas are imaged globally and locally by geophysical observations such as seismic tomography and electrical conductivity profiles. Magma sources in the deep crust and mantle and transport to or near the surface are also imaged by these geophysical tools. These are processes imaged with geophysical methods with which a three-dimensional structure of fluid and magma plumbing systems can be described, and in the geological records of earlier phenomena.
The proposed session will focus on those phenomena including laboratory experiments, numerical modeling, and observations using geophysical and geochemical approaches. These include physical and chemical properties and process of fluids and magmas, near surface processes of seismicity in subduction zones, volcanic eruptions as well as geophysical imaging of various scales from locally to globally. Contributions to any of these subjects are encouraged.
We also welcome papers stimulating an interdisciplinary collaboration relating to establishment of the Study of Earth Deep Interior (SEDI)-Japan community.
