Tomography of the Whole Earth Figures

2012 Fiscal Year Final Research Report

• Project/Area Number: 21740323
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Solid earth and planetary physics
• Research Institution: The University of Tokyo
• Principal Investigator: TAKEUCHI Nozomu 東京大学, 地震研究所, 准教授 (90313048)
• Project Period (FY): 2009 – 2012
• Keywords: 内部構造

Research Abstract

The purpose of this study is to constrain chemical and thermal structures of the whole Earth by obtaining tomography models with higher accuracy and resolution. By using our advanced method, we obtained fine velocity model of the whole mantle. We also obtained fine topography model of the discontinuities by using dense Japanese array data. We showed fine-scale spacial correlations between these two models and obtained strongevidence for the existence of chemical heterogeneities in the lowermost mantle.

Research Products

• [Journal Article] On thePossibility of lunar core phase detection using new seismometers for soft-landers in future lunar missions (2013)
  • Author(s): Yamada, R., Garcia, R.F., Lognonne, P., Kobayashi, N., Takeuchi, N., Nebut, T., Shiraishi, H., Calvet, M. & Ganepain-Beyneix, J.
  • Journal Title: Planet. Space Sci. Volume: vol.81 Pages: 18-31
  • Peer Reviewed
• [Journal Article] High-velocity anomaly adjacent to the western edge of the Pacific low-velocity province (2013)
  • Author(s): Idehara, K., Tanaka, S. & Takeuchi, N.
  • Journal Title: Geophys. J. Int. Volume: vol.192 Pages: 1-6
  • Peer Reviewed
• [Journal Article] N., Detection of ridge-like structures in the Pacific Large Low-Shear-Velocity Province (2012)
  • Author(s): Takeuchi
  • Journal Title: Earth Planet. Sci. Lett. Volume: vol.319-320 Pages: 55-64
  • Peer Reviewed
• [Journal Article] Seismic attenuation structure of the top half of the inner core beneath the northeastern Pacific (2010)
  • Author(s): Iritani, R. Takeuchi, N. & Kawakatsu, H.
  • Journal Title: Geophys. Res. Lett. Volume: vol.37 Pages: L19303
  • DOI: doi:10.1029/2010GL044053.
  • Peer Reviewed
• [Journal Article] Fine-scale topography of the D" discontinuity and its correlation to volumetric velocity fluctuations (2010)
  • Author(s): Takeuchi, N. & Obara, K.
  • Journal Title: Phys. Earth Planet. Int. Volume: vol. 183 Pages: 126-135
  • Peer Reviewed
• [Journal Article] Simulation of heterogeneity sections obtained by neutrino radiography (2010)
  • Author(s): Takeuchi N.
  • Journal Title: Earth Planets Space Volume: vol.62 Pages: 215-221
  • Peer Reviewed
• [Journal Article] 非球対グローバル地球モデルに対する理論波形計算手法-トモグラフィーに応用された手法を中心に- (2009)
  • Author(s): 竹内希
  • Journal Title: 地震2 Volume: vol.61 Pages: S75-S81
  • Peer Reviewed
• [Journal Article] A low-velocity conduit throughout the mantle in the robust component of a tomography model (2009)
  • Author(s): Takeuchi N.
  • Journal Title: Geophys. Res. Lett. Volume: vol.36 Pages: L07306
  • DOI: doi:10.1029/2009GL037590.
  • Peer Reviewed
• [Presentation] NECESSArrayプロジェクトチー, ScS多重反射波のトモグラフィー解析による不連続面のマッピング (2012)
  • Author(s): 竹内希
  • Organizer: 日本地震学会
  • Place of Presentation: 函館市函館市民会館
  • Year and Date: 2012-10-18
• [Presentation] NECCESS Arrayデータとグローバルカタログデータのジョイントトモグラフィー法 (2012)
  • Author(s): 竹内希・川勝均・田中聡・大林政行・入谷良平・宮川幸治・出原光暉・利根川貴志
  • Organizer: 日本地球惑星科学連合大会
  • Place of Presentation: 千葉市幕張メッセ
  • Year and Date: 2012-05-20
• [Presentation] Upper-mantle tomography with array analysis of triplicated P-arrivals observed by NECESSArray (2011)
  • Author(s): N. Takeuchi, H. Kawakatsu, S. Tanaka, J. Chen, J. Ning, S. Grand, F. Niu, M. Obayashi, R. Iritani, K. Miyakawa, K. Idehara, T. Tonegawa & NECESSArrayProject Team
  • Organizer: AGU Fall Meeting
  • Place of Presentation: 米国カリフォルニア 州サンフランシスコ市
  • Year and Date: 2011-11-07
• [Presentation] NECESSArrayトリプリケーションデータを用いた上部マントルP波走時トモグラフィー (2011)
  • Author(s): 竹内希・川勝均・田中聡・大林政行・入谷良平・宮川幸治・出原光暉・利根川貴志・NECESSArrayプロジェクトチーム
  • Organizer: 日本地震学会
  • Place of Presentation: 静岡市グランシップ
  • Year and Date: 2011-10-12
• [Presentation] 太平洋下最下部マントルの微細全体像 (2010)
  • Author(s): 竹内希
  • Organizer: 日本地震学会
  • Place of Presentation: 広島市広島国際会議場
  • Year and Date: 2010-10-27
• [Presentation] 広帯域海底地震計データから示唆される下部マントルの急激なS波速度勾配(invited) (2010)
  • Author(s): 竹内希・塩原肇・一瀬建日・杉岡裕子・金沢敏彦
  • Organizer: 日本地球惑星科学連合大会
  • Place of Presentation: 千葉市幕張メッセ
  • Year and Date: 2010-05-26
• [Presentation] Fine-scale volumetric velocity heterogeneities and D'' discontinuity topography constrained by Hi-net Tiltmeter Data (2009)
  • Author(s): N. Takeuchi & K. Obara
  • Organizer: AGU Fall meeting
  • Place of Presentation: 米国カリフォルニア 州サンフランシスコ市
  • Year and Date: 2009-12-17
• [Presentation] migrationによる南西太平洋地域のD"不連続面topographyの検出 (2009)
  • Author(s): 竹内希・小原一成
  • Organizer: 日本地震学会
  • Place of Presentation: 京都市京都大学吉田キャンパス
  • Year and Date: 2009-10-23
• [Presentation] 外核最下部の有限な剛性率の実体波コアフェーズへの影響 (2009)
  • Author(s): 竹内希
  • Organizer: 日本地震学会
  • Place of Presentation: 京都市京都大学吉田キャンパス
  • Year and Date: 2009-10-22
• [Presentation] Fine-Scale Heterogeneities in the Lowermost Mantle Constrained by BroadbandTiltmeter Waveforms (2009)
  • Author(s): 竹内希 ・小原一成
  • Organizer: 日本地球惑星科学連合大会
  • Place of Presentation: 千葉市幕張メッセ
  • Year and Date: 2009-05-19
• [Remarks]
  • URL: http://www.eri.u-tokyo.ac.jp/takeuchi/