[S-MP31] Deformation, metamorphism, and tectonics: Exploring the solid Earth dynamics via rocks

[SMP31-P05] Abrupt changes in subduction-zone geothermal gradient revealed by contact metamorphism during arc–arc collision in central Japan

*Hiroshi Mori¹, Yuki Nobe^1,2, Mizumura Hiroki^1,3, Ken Yamaoka⁴, Kazuhiro Ozawa⁵, Daichi Murakami¹, Shiori Horiba^1,6, Dohi Hina⁷, Kaho Nobuhara¹, Tetsuya Tokiwa¹, Yui Kouketsu⁷ (1. Shinshu University, 2. J-POWER (Electric Power Development Co., Ltd.), 3. Kyowa Sekkei Co., Ltd., 4. GSJ, AIST, 5. Precision Forestry Measurement Ltd., 6. Nippon Koei Co. Ltd., 7. Nagoya University)

Keywords:contact metamorphism, geothermal gradient, Raman CM geothermometry, thermal modeling, arc–arc collision, Miocene