| Co-Investigator(Kenkyū-buntansha) |
KAWAHARA Akira Okayama Univ., Min. Inst., Prof., 理学部, 教授 (40012372)
IRIFUNE Tetsuo Ehime Univ., Inst. of Geosci., Assoc. Prof., 理学部, 助教授 (80193704)
AOKI Yoshikazu Kyushu Univ., Inst. of Planet. Sci., Prof., 理学部, 教授 (00037277)
IKEDA Yukio Ibaragi Univ., Inst. of Geosci., Prof., 理学部, 教授 (90114008)
TAGAI Tokuhei Univ. of Tokyo, Min. Inst., Assoc. Prof., 理学部, 助教授 (40011738)
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| Research Abstract |
This year is the last of the three years project. New techiniques developed in the field of material science have been applied to investigate the formation processes of minerals which are recorded in the macroscopic textures, mineral assembrages, variation of chemical compositons, submicroscopic structures and higher order structures of minerals. The objects of our researches are not only restricted to the materials of the Earth's surface but also the Earth's mantle materials, meteorites and lunar samples. A principle of the material evolutin in the solar system is our goal of this project. In this year's research, we carried out the comprehensive and precise studies on the formation conditions and cooling histories of the earth and planetary materials using the comventional mineralogical methods combined with highly advanced technologies in the modern material science. To promote progresses of their cooperative works, we organized a meeting in Kyoto. In the meeting we discussed on the
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current problems such as ; what kinds of interesting problems we can effectively solve in the field of the earth and planetary science by means of what kinds of methods in the material science. The themes discussed include : 1. distribution of noble gas isotopes in meteorites (by Takaoka), 2. domain structure in kaliophilite and its dependency on the chemical composition (by Kawahara), 3. the chemical composition of Mars ; an estimation from the high pressure experimentsh (by Kamaya, Onuma), 4. application of Gandolfi-camera on the precise determination of the lattice constants (by Nakamuta, Aoki), 5. Local structure of minerals ; application of EXAFS-method on the study of thermal vibration (by Yoshiasa), 6. crystallinity of radiolaria and the geological applications (by Koto), 8. diffusion of elements in olivine under high temperature and high pressure (by Mori), 9. material evolution in the early stages of earth-type planet (by Takeda). Through these presentations we discussed the possibilities how we can effectively develop powerful methods to the various research objects. Less
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