Japan Geoscience Union Meeting 2023

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[J] Oral

S (Solid Earth Sciences ) » S-MP Mineralogy & Petrology

[S-MP26] Deformed rocks, Metamorphic rocks and Tectonics

Thu. May 25, 2023 1:45 PM - 3:00 PM 301B (International Conference Hall, Makuhari Messe)

convener:Yumiko Harigane(Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST)), Yoshihiro Nakamura(Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology), Takayoshi Nagaya(Tokyo Gakugei University), Chairperson:Takeshi Imayama(Research Institute of Frontier and Science Technology, Okayama University of Science), Yoshihiro Nakamura(Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology)

2:00 PM - 2:15 PM

[SMP26-02] Metamorphic Temperature Structure of NW Shibukawa Area in Sanbagawa metamorphic belt, Chubu District, Japan

*Akane Matsuzaki1, Yui Kouketsu1, Katsuyoshi Michibayashi1 (1.Graduate School of Environmetal Studies, Nagoya University)

Keywords:Sanbagawa belt, Raman carbonaceous material thermometer, pelitic schists

The thermal structure of the Sanbagawa metamorphic belt has been clarified in many areas from the Kanto Mountains to Shikoku using Raman carbonaceous material geothermometer. However, there are differences in the interpretation of the thermal structure obtained by different papers. Although there are many areas where temperature increases are observed in the vicinity of the Median Tectonic Line (MTL), their interpretation continues to be debated. The Sanbagawa metamorphic belt in the Chubu District is divided into the Tenryugawa and Shibukawa areas by the Atakogawa Fault near the border between Aichi and Shizuoka Prefectures. The Shibukawa area consists of the Sanbagawa crystalline schists, which are composed of pelitic schist, mafic schist, and siliceous schist. In this study, the metamorphic temperatures were estimated using a Raman carbonaceous material thermometer for pelitic schists collected from the northwestern part in the Shibukawa area in the vicinity of Shinshiro, Aichi Prefecture, Japan and the thermal structure in the entire northern Shibukawa area will be discussed.