田中亮吏

RYOJI TANAKA

Professor of Geochemistry, Cosmochemistry, Petrology, & Astrobiology

ryoji@misasa.okayama-u.ac.jp

The Pheasant Memorial Laboratory for Geochemistry & Cosmochemistry,

Institute for Planetary Materials, Okayama University

Yamada 827, Misasa, Tottori, 682-0193, JAPAN

Research and Professional Speciality: I have conducted research on the chemical structure of the Earth's interior, the evolution of the early solar system materials, and the biotic and abiotic stable isotope fractionation processes. I have also developed many analytical procedures to determine the elemental and isotopic compositions of multiple elements necessary for these researches. I have actively collaborated with many international researchers in the application of these analytical methods. In the field of earth science, I have contributed to the study of chemical evolution and magma genesis in the Earth's mantle by conducting chemical and isotopic analyses of volcanic rocks erupted in hot spots such as the Hawaiian Islands, the Cameroon volcanic line, the Afar region, and etc. In planetary science, I contributed to the elucidation of the evolutionary process of the precursor materials of terrestrial planets by unraveling the solid-gas reaction process in the inner protoplanetary disk. I was also in charge of the analysis of returned samples from JAXA's Hayabusa and Hayabusa2 asteroid exploration missions. In particular, I contributed to elucidating the origin of the asteroid Ryugu and its aqueous alteration process by analyzing hydrogen, carbon, nitrogen, chromium, and calcium isotopes in samples recovered by the Hayabusa2 mission.