固体地球科学(S) | |||
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セッション小記号 | 地球内部科学・地球惑星テクトニクス(IT) | ||
セッションID | S-IT24 | ||
タイトル | 和文 | Attenuation from crust to core: in situ experiments, observaions and implications | |
英文 | Attenuation from crust to core: in situ experiments, observaions and implications | ||
タイトル短縮名 | 和文 | Attenuation from crust to core: in situ experiments, observaions and implications | |
英文 | Attenuation from crust to core | ||
代表コンビーナ | 氏名 | 和文 | 小西 健介 |
英文 | Konishi Kensuke | ||
所属 | 和文 | 台湾中央研究院地球科学研究所 | |
英文 | Institute of Earth Sciences, Academia Sinica | ||
共同コンビーナ 1 | 氏名 | 和文 | 片山 郁夫 |
英文 | Ikuo Katayama | ||
所属 | 和文 | 広島大学大学院理学研究科地球惑星システム学専攻 | |
英文 | Department of Earth and Planetary Systems Science, Hiroshima University | ||
共同コンビーナ 2 | 氏名 | 和文 | 芳野 極 |
英文 | Takashi Yoshino | ||
所属 | 和文 | 岡山大学惑星物質研究所 | |
英文 | Institute for Planetary Materials, Okayama University | ||
共同コンビーナ 3 | 氏名 | 和文 | Alexandre Schubnel |
英文 | Alexandre Schubnel | ||
所属 | 和文 | CNRS | |
英文 | CNRS | ||
発表言語 | E | ||
スコープ | 和文 | Most tomographic studies have been focused upon drawing maps of seismic velocity (SV) structures based on seismic data, with the ultimate goal of learning more about the structure and the composition of the mantle. Another key physical property that is accessible from seismic data is seismic attenuation (SA). Due to complications in isolating its intrinsic causes - e.g. local physical changes - and its extrinsic contributions - mainly scattering and other wave-propagation effects - SA has been underutilized. Yet, advances in waveform inversion have in association with recent enhancements of data permitted for a finer, more comprehensive determination of SA, opening the way to structural interpretations. Difficulties in classifying and modelling the possible causes of intrinsic SA - e.g. temperature, melt, volatiles, and grain size - have also been raised. Increasingly, theoretical and experimental mineral physics have come to document the relationship between the behavior of SA and an assortment of other phenomena - most particularly, partial melt. These results can subsequently be used interpret seismological observations. Seismic attenuation is critically implicated in structure, composition, and in fine mantle dynamics at the local, regional, and global scales. It may be used to constrain the existence of water in the transition zone; the presence of melt in various regions - for instance around subduction zones; and in the temperature field of the deep mantle - which would, in turn, help to resolve the chemical contribution to SV observed in this region. In this session, we would like to discuss aspects of mantle attenuation, with the aim of sharing the current state of all relevant fields of study. We welcome contributions from different fields - in particular, from seismology, mineral physics, and geodynamics, as these may advance our mutual comprehension of SA and its implications; and lay the groundwork for future research and applications thereof. | |
英文 | Most tomographic studies have been focused upon drawing maps of seismic velocity (SV) structures based on seismic data, with the ultimate goal of learning more about the structure and the composition of the mantle. Another key physical property that is accessible from seismic data is seismic attenuation (SA). Due to complications in isolating its intrinsic causes - e.g. local physical changes - and its extrinsic contributions - mainly scattering and other wave-propagation effects - SA has been underutilized. Yet, advances in waveform inversion have in association with recent enhancements of data permitted for a finer, more comprehensive determination of SA, opening the way to structural interpretations. Difficulties in classifying and modelling the possible causes of intrinsic SA - e.g. temperature, melt, volatiles, and grain size - have also been raised. Increasingly, theoretical and experimental mineral physics have come to document the relationship between the behavior of SA and an assortment of other phenomena - most particularly, partial melt. These results can subsequently be used interpret seismological observations. Seismic attenuation is critically implicated in structure, composition, and in fine mantle dynamics at the local, regional, and global scales. It may be used to constrain the existence of water in the transition zone; the presence of melt in various regions - for instance around subduction zones; and in the temperature field of the deep mantle - which would, in turn, help to resolve the chemical contribution to SV observed in this region. In this session, we would like to discuss aspects of mantle attenuation, with the aim of sharing the current state of all relevant fields of study. We welcome contributions from different fields - in particular, from seismology, mineral physics, and geodynamics, as these may advance our mutual comprehension of SA and its implications; and lay the groundwork for future research and applications thereof. | ||
発表方法 | 口頭および(または)ポスターセッション | ||
招待講演 | Jerome Fortin (Ecole Normale Superieure - Paris) 武井 康子 (東京大学地震研究所) 竹内 希 (東京大学地震研究所) |
時間 | 講演番号 | タイトル | 発表者 | 予稿原稿 |
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口頭発表 5月26日 AM1 | ||||
09:00 - 09:15 | SIT24-01 | Anomalous Vp/Vs Ratios at Seismic Frequencies Might Evidence Highly Damaged Rocks in Subduction Zones | Alexandre Schubnel | 予稿 |
09:15 - 09:30 | SIT24-02 | Imaging crustal seismic attenuation, central Taupo Volcanic Zone, New Zealand | Stephen C Bannister | 予稿 |
09:30 - 09:45 | SIT24-03 | 海洋アセノスフェア地震学的構造に対する新たな制約 | 竹内 希 | 予稿 |
09:45 - 10:00 | SIT24-04 | Frequency effects on elastic properties of saturated porous rocks: Experimental investigations | Jerome Fortin | 予稿 |
10:00 - 10:15 | SIT24-05 | Rock anelasticity due to grain boundary premelting | 武井 康子 | 予稿 |
10:15 - 10:30 | SIT24-06 | Experimental study of the effects of partial melting on anelasticity: toward quantitative interpretations of seismic high attenuation | 山内 初希 | 予稿 |
講演番号 | タイトル | 発表者 | 予稿原稿 |
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ポスター発表 5月26日 PM2 | |||
SIT24-P01 | 水に飽和した花崗岩の三軸試験中での地震波減衰の測定 | 片山 郁夫 | 予稿 |
SIT24-P02 | Waveform inversion for the radial elastic and anelastic structure of the lowermost mantle beneath Central America and the Caribbean | Borgeaud Anselme | 予稿 |
SIT24-P03 | 3-D elastic and anelastic structure of the lowermost mantle beneath the western Pacific from finite-frequency tomography | 小西 健介 | 予稿 |
SIT24-P04 | Inferring the lowermost mantle thermo-chemical structure beneath the Western Pacific with seismic attenuation and shear-wave speed anomalies | Frederic Deschamps | 予稿 |
SIT24-P05 | Intrinsic attenuation factor Q of partially molten Fe–S–O system | Chao Liu | 予稿 |
SIT24-P06 | サーマルクラックの入った花崗岩における間隙水圧の弾性波減衰への影響 | 山田 恵也 | 予稿 |