[S-IT29] [EE] New perspectives on East Asia geodynamics from the crust to the mantle

Tue. May 23, 2017 5:15 PM - 6:30 PM Poster Hall (International Exhibition Hall HALL7)

The Philippine Sea plate and smaller East Asia marginal basins have been sandwiched by convergence of the larger Pacific and Indo-Australian plates towards Eurasia, producing some of the most active tectonic environments on Earth. The last decade has yielded a wide range of new observations that include geologic data along the plate margins, crustal to mantle imaging, and the geometry of subducted slabs. Together, these new perspectives have important implications for understanding the dynamics of plate interactions in this region. Here we seek oral and poster presentations that bear on the geologic history and geophysical character of modern and ancient plates in East Asia. We also invite geodynamic models that integrate these diverse datasets into a more holistic view of this dynamic environment.

[SIT29-P01] Lithospheric structure of East Sea of Korea from teleseismic receiver functions: Seismic evidence of ancient back-arc basin opening

*HyeJeong Kim¹, Younghee Kim¹ (1.School of Earth and Environmental Sciences, Seoul National University)

[SIT29-P02] Stress field did not change at 15 Ma in SW Japan: Counterevidence from dike orientations

*Toshiki Haji¹, Atsushi Yamaji¹, Katsushi Sato¹ (1.Graduate School of Science/Faculty of Science, Kyoto University)

[SIT29-P03] Deep focus earthquakes and slab-like structure beneath Northeast China and surrounding regions

*Fengxue Zhang¹, Qingju Wu¹ (1.Institute of Geophysics, China Earthquake Administration)

[SIT29-P04] 3-D upper mantle structure beneath the Sea of Japan with inter-station surface-wave analysis using multiple seismic arrays

Ryo Narita¹, Kouta Hamada¹, *Kazunori Yoshizawa^1,2, Hitoshi Kawakatsu³, Hiroki Miyamachi⁴, Masayoshi Ichiyanagi⁵, Hiroaki Takahashi⁵, Iurii Levin⁶, Valentin Mikhaylov⁶, Dmitrii Kostylev⁶ (1.Graduate School of Science, Hokkaido University, 2.Faculty of Science, Hokkaido University, 3.Earthquake Research Institute, The University of Tokyo, 4.Graduate School of Science and Engineering, Kagoshima University, 5.Institute of Seismology and Volcanology, Hokkaido University, 6.Sakhalin Branch of Geophysical Survey, Russian Academy of Sciences)

[SIT29-P05] Petrological and geochemical features of gabbros and relatively primitive basalts from Nikoro Group, Tokoro belt, eastern Hokkaido: Implications for the geodynamic setting

*Toru Yamasaki¹, Futoshi Nanayama¹ (1.Geol. Survey of Japan (AIST))

[SIT29-P06] Velocity structure of uppermost mantle from Pn tomography beneath the southeastern margin of the Tibetan Plateau

*Lian Sun¹, Qingju Wu¹ (1.Institute of Geophysics,China Earthquake Administration)

[SIT29-P07] Dissolved helium isotopes in groundwater: Implication for subduction of continental crust in an active arc-continent collision

*Ai-ti Chen¹, Chuan-chou Shen¹, Timothy B Byrne², Yuji Sano³, Naoto Takahata³, Tsanyao Frank Yang⁴, Cheng-Hong Chen⁴, Tsung-Kwei Liu⁴, Kuan-Yu Chen⁵, Yunshuen Wang⁶ (1.High-Precision Mass Spectrometry and Environment Change Laboratory (HISPEC), Department of Geosciences, National Taiwan University, Taipei, Taiwan, R.O.C., 2.Center for Integrative Geosciences, University of Connecticut, Storrs, CT 06269-1045, United States, 3.Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwanoha, Kashiwa, Chiba 277-8564, Japan, 4.Department of Geosciences, National Taiwan University, Taipei, Taiwan, R.O.C., 5.Industrial Technology Research Institute, Taipei, Taiwan, R.O.C., 6.Central Geological Survey, MOEA, Taipei, Taiwan, R.O.C.)

[SIT29-P08] Moho Depth of The South China Sea Basin from Three-dimensional gravity inversion with control points and its characteristic

*Wu Zhaocai¹ (1.Second Institute of Oceanography State Oceanic Administration)

[SIT29-P09] The tectonic boundaries of the Jiangnan belt in South China: insights from potential-field anomalies

*Lianghui Guo¹ (1.China University of Geosciences (Beijing), School of Geophysics and Information Technology)

[SIT29-P10] Lithospheric rebuilding of the Alashan and ordos by upper mantle upwelling: evidence from multiscale teleseismic tomography

*Biao Guo¹, Qiyuan Liu¹, Jiuhui Chen¹ (1.Institute of Geology, China Earthquake Administration)

Session information