Japan Geoscience Union Meeting 2022

Session information

[E] Poster

S (Solid Earth Sciences ) » S-IT Science of the Earth's Interior & Techtonophysics

[S-IT20] New perspectives on accretion and exhumation processes during oblique plate convergence

Tue. May 31, 2022 9:00 AM - 11:00 AM Online Poster Zoom Room (23) (Ch.23)

convener:Timothy B Byrne(University of Connecticut), convener:Jian-Cheng Lee(Academia Sinica), Asuka Yamaguchi(Atomosphere and Ocean Research Institute, The University of Tokyo), convener:Yui Kouketsu(Department of Earth & Planetary Sciences, Graduate School of Environmental Studies, Nagoya University), Chairperson:Timothy B Byrne(University of Connecticut), Jian-Cheng Lee(Academia Sinica), Asuka Yamaguchi(Atomosphere and Ocean Research Institute, The University of Tokyo), Yui Kouketsu(Department of Earth & Planetary Sciences, Graduate School of Environmental Studies, Nagoya University), Gong-ruei Ho(Academia Sinica, Institute of Earth Sciences)

South and East Asia represent one of the most tectonically active regions on Earth. The Pacific, Indo-Australia, and Eurasian plates converge around the Philippine Sea plate, resulting in a wide range of geologically and tectonically complex plate boundaries, including regions of both active and inactive oblique plate convergence. Many of these areas also preserve geologic evidence for subduction of oceanic and continental fragments to high, or ultrahigh pressures (i.e., mantle depths), raising fundamental questions about plate- and outcrop-scale processes. For example, does oblique convergence play a relatively unique role in the generation and/or preservation (i.e., subduction and exhumation) of high-pressure metamorphism? If so, are the accretion and exhumation flow paths truly 3D so plane strain may not apply? Finally, is there a characteristic signature in the rock record that can be used to identify past areas of oblique convergence? Here, we seek oral and poster presentations that bear on the accretion and exhumation processes along modern and ancient plate boundaries associated with either normal or oblique convergence. We also invite discussions of geodynamic models that integrate oblique convergence into a more holistic view of subduction, accretion, and exhumation.

9:00 AM - 11:00 AM

*Dominikus Deka Dewangga1, Chin-Ho Tsai1, Yoshiyuki Iizuka2, Yui Kouketsu3 (1.Department of Natural Resources and Environmental Studies, National Dong Hwa University, Taiwan, 2.Institute of Earth Sciences, Academia Sinica, Taiwan, 3.Graduate School of Earth and Planetary Science, Nagoya University, Japan)

9:00 AM - 11:00 AM

*Wen-Han Lo1, Enggar Wisnu Cahyaning Ratri1, Chin-Ho Tsai1, Yui Kouketsu2, Yoshiyuki Iizuka3 (1.Department of Natural Resources and Environmental Studies, National Dong Hwa University, Taiwan, 2.Graduate School of Earth and Planetary Sciences, Nagoya University, Japan, 3.Institute of Earth Sciences, Academia Sinica, Taipei, Taiwan)

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