Meeting room "Glova", 4 floor, Integrated Research Building
Abstract
Aqueous fluids (and hydrous melts) dehydrated from hydrous minerals in subduction zones migrate quickly in wide area in the mantle and crust as various forms. Recently, Prof. E Takahashi (Tokyo Tech.) and his co-workers organized a research project consisting of more than 60 scientists working in the area of geophysics and earth's material sciences including seismology, geomagnetism, petrology, geochemistry, experimental petrology and mineralogy, molecular dynamics and computer simulations of subduction-wedge mantle system. Our main purpose of this project is to present a "preliminary reference rock model (PROM)", which provides a tested for physical properties of fluid bearing rocks in a coherent manner (e.g., Nakamura, 2010, the second symposium of geofluid), and the "geofluid map" under the Japanese island arc. In the "geofluid" project, I mainly study next two scientific problems, with the groups of Kyoto Univ. and Tokyo Tech: (1) Chemical composition of aqueous fluid (and hydrous melts) and residual rocks at dehydration (partial melting) in the Earth`s interior, and element partitioning between fluid and minerals. (2) Seismic velocities of fluid-free and fluid-bearing crustal and mantle rocks. In this seminar, I present the topics of the first problem, and the partitioning of U-Th-Pb, Sr-Rb and lanthanoid elements between aqueous fluid and minerals.
For inquiry：Taku Tsuchiya TEL:（089）927-8198
E-mail takut@sci.ehime-u.ac.jp
