JpGU-AGU Joint Meeting 2020

セッション情報

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[E] 口頭発表

セッション記号 S (固体地球科学) » S-IT 地球内部科学・地球惑星テクトニクス

[S-IT27] Oceanic lithosphere and asthenosphere

コンビーナ:竹内 希(東京大学地震研究所)、Ban-Yuan Kuo(Institute of Earth Sciences, Academia Sinica)、Rob L Evans(Woods Hole Oceanographic Institution)、Younghee Kim(Seoul National University)

The oceanic lithosphere/asthenosphere system (LAS) is one of the most fundamental features of plate tectonics. In recent years, the elucidation of the oceanic lithosphere/asthenosphere system has become one of the hot topics in solid earth science. New data from the ocean floor are being extensively obtained under the Pacific Array initiative (http://eri-ndc.eri.u-tokyo.ac.jp/PacificArray/) and others, and a great variety of views are proposed and discussed. In this session, we will discuss on observation technologies, views of the oceanic lithosphere/asthenosphere system, the strategies for interpretation of the observations (including seismic and/or electrical conductivity anisotropy), constraints/ideas on the role and abundance of water/melt in the mantle (including the transition zone), and other related topics for elucidating this enigmatic system. We call for contributions from diverse fields, including but not limited to seismology, magnetotellurics, petrology/mineralogy, dynamical modelling, and mineral physics.

[SIT27-07] A comprehensive portrait of the central Pacific lithosphere-asthenosphere system from NoMelt seafloor geophysical observations

James Gaherty2、Joshua Russell3、Hannah Mark4、Zhitu Ma5、Colleen Dalton5、Daniel Lizarralde1、Greg Hirth5、John Collins1、*Rob L Evans1 (1.Dept of Geology and Geophysics, Woods Hole Oceanographic Institution、2.School of Earth and Sustainability, Northern Arizona University、3.Columbia Univ., Lamont Doherty Earth Observatory、4.Dept. of Earth and Planetary Sciences, Washington University, St. Louis、5.Dept. of Earth, Environmental, and Planetary Sciences, Brown Univ)

[SIT27-09] Shear attenuation and anelastic mechanisms in the central Pacific upper mantle

★Invited Papers

*Zhitu Ma1、Colleen A Dalton2、Joshua B Russell3、James B Gaherty3、Greg Hirth2、Donald W Forsyth2 (1.State Key Laboratory of Marine Geology, Tongji University, Shanghai, China、2.Department of Earth, Environmental and Planetary Sciences, Brown University, Providence, RI, USA、3.Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, USA )

[SIT27-11] Upper mantle velocity structure beneath the northern Ryukyu subduction zone revealed from multiscale finite-frequency traveltime tomography

★Invited Papers

*Shu-Huei Hung1、Ban-Yuan Kuo2、Pei-Ying Patty Lin3、Yuancheng Gung1、Eh Tan2、Kate Huihsuan Chen3、Ching-Ren Lin2、Chau-Chang Wang5,4、Shuichi Kodaira6、Yasushi Ishihara6、Mamoru Nakamura7 (1.National Taiwan University, Taipei, Taiwan、2.Academia Sinica, Taipei, Taiwan、3.National Taiwan Normal University, Taipei, Taiwan、4.Taiwan Ocean Research Institute, National Applied Research Laboratories, Kaohsiung, Taiwan 、5.National Sun Yat-sen University, Kaohsiung, Taiwan、6.Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan、7.University of the Ryukyus, Okinawa, Japan)

[SIT27-12] Future geophysical observation on oceanic lithosphere and asthenosphere study: Hawaii-Emperor Bend (HEB) Project

*馬場 聖至1、Bernhard Steinberger2,3、Marion Jegen4、Max Moorkamp5、一瀬 建日1、竹尾 明子1、Antje Schlömer5、HEB研究グループ (1.東京大学地震研究所、2.GFZ, Helmholtz Centre, Potsdam、3.CEED, University of Oslo、4.GEOMAR, Helmholtz Centre of Ocean Research Kiel、5.Munich University)