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High-resolution mapping of the lithosphere-asthenosphere boundary with seismic wave analysis

Research Project

Project/Area Number 26400443
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Solid earth and planetary physics
Research InstitutionHokkaido University

Principal Investigator

Yoshizawa Kazunori  北海道大学, 理学研究院, 准教授 (70344463)

Research Collaborator Kennett Brian L. N.  
HAMADA KOUTA  
NARITA RYOU  
MATSUZAWA HITOSHI  
Project Period (FY) 2014-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Keywordsリソスフェア / アセノスフェア / 表面波 / 上部マントル / 地球内部構造 / 異方性
Outline of Final Research Achievements

Lithosphere-asthenosphere boundaries beneath continental and oceanic regions are estimated from high-resolution 3-D S wave speed models derived from simultaneous inversions of multi-mode Love and Rayleigh waves. We also investigated the effects of arbitrary selection of independent parameters for radial anisotropy of shear waves. New radial anisotropy models in Australia and Pacific regions exhibit conspicuous radial anisotropy with SH>SV in the asthenosphere, indicating the effects of strong shear at the base of the fast drifting lithosphere. We also found that the estimated depths of Mid-Lithosphere Discontinuity (MLD) in the continental lithosphere from S-wave receiver functions coincide well with the inflection point of vertical profiles of radial anisotropy, which is likely to be related to the existence of fine-scale laminated random heterogeneities in the lithosphere.

Report

(4 results)
  • 2016 Annual Research Report   Final Research Report ( PDF )
  • 2015 Research-status Report
  • 2014 Research-status Report
  • Research Products

    (32 results)

All 2016 2015 2014 Other

All Int'l Joint Research (2 results) Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Acknowledgement Compliant: 3 results) Presentation (26 results) (of which Int'l Joint Research: 6 results,  Invited: 3 results) Remarks (1 results)

  • [Int'l Joint Research] Australian National University(オーストラリア)

    • Related Report
      2016 Annual Research Report
  • [Int'l Joint Research] オーストラリア国立大学(オーストラリア)

    • Related Report
      2015 Research-status Report
  • [Journal Article] The lithosphere-asthenosphere transition and radial anisotropy beneath the Australian continent2015

    • Author(s)
      Yoshizawa, K. and Kennett, B.L.N.
    • Journal Title

      Geophys. Res. Lett.

      Volume: 42 Issue: 10 Pages: 3839-3846

    • DOI

      10.1002/2015gl063845

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Interstation phase speed and amplitude measurements of surface waves with nonlinear waveform fitting: application to USArray2015

    • Author(s)
      Hamada, K. and Yoshizawa, K.
    • Journal Title

      Geophys. J. Int.

      Volume: 202 Issue: 3 Pages: 35-54

    • DOI

      10.1093/gji/ggv213

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Radially anisotropic 3-D shear wave structure of the Australian lithosphere and asthenosphere from multi-mode surface waves2014

    • Author(s)
      Yoshizawa, K.
    • Journal Title

      Phys. Earth Planet. Inter.

      Volume: 235 Pages: 33-48

    • DOI

      10.1016/j.pepi.2014.07.008

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] リソスフェア内のランダム不均質性とみかけの鉛直異方性:表面波位相度への影響2016

    • Author(s)
      吉澤和範
    • Organizer
      日本地震学会2016年秋季大会
    • Place of Presentation
      名古屋国際会議場(愛知県名古屋市)
    • Year and Date
      2016-10-07
    • Related Report
      2016 Annual Research Report
  • [Presentation] アレイ解析によるマルチモード表面波の位相速度計測2016

    • Author(s)
      松澤仁志,吉澤和範
    • Organizer
      日本地震学会2016年秋季大会
    • Place of Presentation
      名古屋国際会議場(愛知県名古屋市)
    • Year and Date
      2016-10-07
    • Related Report
      2016 Annual Research Report
  • [Presentation] 表面波二点法解析による位相・振幅比データを用いた北米大陸下の3次元S波速度構造2016

    • Author(s)
      浜田広太,吉澤和範
    • Organizer
      日本地震学会2016年秋季大会
    • Place of Presentation
      名古屋国際会議場(愛知県名古屋市)
    • Year and Date
      2016-10-05
    • Related Report
      2016 Annual Research Report
  • [Presentation] 広帯域アレイを用いた日本海下の上部マントル3次元S波速度構造2016

    • Author(s)
      成田涼,浜田広太,吉澤和範,川勝均
    • Organizer
      日本地震学会2016年秋季大会
    • Place of Presentation
      名古屋国際会議場(愛知県名古屋市)
    • Year and Date
      2016-10-05
    • Related Report
      2016 Annual Research Report
  • [Presentation] 広帯域海底地震観測記録を用いた太平洋上部マントル3次元S波速度構造2016

    • Author(s)
      一瀬建日,塩原肇,吉澤和範,杉岡裕子,伊東亜紀,末次大輔
    • Organizer
      日本地震学会2016年秋季大会
    • Place of Presentation
      名古屋国際会議場(愛知県名古屋市)
    • Year and Date
      2016-10-05
    • Related Report
      2016 Annual Research Report
  • [Presentation] Interstation phase speed measurements of surface waves in the Sea of Japan using broadband seismic arrays2016

    • Author(s)
      Narita, R., Hamada, K., Yoshizawa, K. and Kawakatsu, H.
    • Organizer
      Japan Geosciences Union
    • Place of Presentation
      幕張メッセ(千葉県千葉市)
    • Year and Date
      2016-05-24
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Multi-scale heterogeneities in continental lithosphere and their implications for lithospheric discontinuities2016

    • Author(s)
      Yoshizawa, K. and Kennett, B.L.N.
    • Organizer
      Japan Geosciences Union
    • Place of Presentation
      幕張メッセ(千葉県千葉市)
    • Year and Date
      2016-05-22
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 3D shear wave structure in the North American upper mantle from interstation phase and amplitude data of surface waves2016

    • Author(s)
      Hamada, K.. and Yoshizawa, K.
    • Organizer
      Japan Geosciences Union
    • Place of Presentation
      幕張メッセ(千葉県千葉市)
    • Year and Date
      2016-05-22
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Lithosphere-Asthenosphere Transition, Mid-Lithosphere Discontinuity and Radial Anisotropy from Multi-mode Surface Wave Tomography2015

    • Author(s)
      Yoshizawa, K. and Kennett, B.L.N.
    • Organizer
      American Geophysical Union 2015 Fall Meeting
    • Place of Presentation
      サンフランシスコ(米国)
    • Year and Date
      2015-12-15
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Joint Inversion of Phase and Amplitude Data of Surface Waves for North American Upper Mantle2015

    • Author(s)
      Hamada, K. and Yoshizawa, K.
    • Organizer
      American Geophysical Union 2015 Fall Meeting
    • Place of Presentation
      サンフランシスコ(米国)
    • Year and Date
      2015-12-15
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] 大陸域におけるリソスフェア内不連続面と鉛直異方性2015

    • Author(s)
      吉澤 和範
    • Organizer
      日本地震学会2015年秋季大会
    • Place of Presentation
      神戸国際会議場(兵庫県神戸市)
    • Year and Date
      2015-10-28
    • Related Report
      2015 Research-status Report
  • [Presentation] 2観測点間の表面波の位相及び振幅比のジョイントインバージョンによる北米大陸下の上部マントル構造2015

    • Author(s)
      浜田 広太,吉澤 和範
    • Organizer
      日本地震学会2015年秋季大会
    • Place of Presentation
      神戸国際会議場(兵庫県神戸市)
    • Year and Date
      2015-10-28
    • Related Report
      2015 Research-status Report
  • [Presentation] Anisotropic layering in the continental upper mantle: Implication for the mid-lithosphere discontinuity?2015

    • Author(s)
      Yoshizawa, K.
    • Organizer
      Japan Symposium of SEDI (Study of the Earth’s Deep Interior) 2015
    • Place of Presentation
      東京大学地震研究所(東京都文京区)
    • Year and Date
      2015-09-26
    • Related Report
      2015 Research-status Report
  • [Presentation] Upper mantle structure of North America using inter-station phase and amplitude of surface waves2015

    • Author(s)
      Hamada, K. and Yoshizawa, K.
    • Organizer
      Japan Symposium of SEDI (Study of the Earth’s Deep Interior) 2015
    • Place of Presentation
      東京大学地震研究所(東京都文京区)
    • Year and Date
      2015-09-26
    • Related Report
      2015 Research-status Report
  • [Presentation] Inter-station phase speed and amplitude measurements of surface waves toward a high-resolution upper mantle model in the Sea of Japan2015

    • Author(s)
      Narita, R., Hamada, K. and Yoshizawa, K.
    • Organizer
      Japan Symposium of SEDI (Study of the Earth’s Deep Interior) 2015
    • Place of Presentation
      東京大学地震研究所(東京都文京区)
    • Year and Date
      2015-09-26
    • Related Report
      2015 Research-status Report
  • [Presentation] Radial anisotropy of the Australian lithosphere and asthenosphere2015

    • Author(s)
      Yoshizawa, K. and Kennett, B.L.N.
    • Organizer
      International Union of Geodesy and Geophysics 26th General Assembly 2015
    • Place of Presentation
      プラハ(チェコ)
    • Year and Date
      2015-06-30
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] マルチモード表面波による上部マントル鉛直異方性の制約2015

    • Author(s)
      吉澤 和範
    • Organizer
      日本地球惑星科学連合2015年大会
    • Place of Presentation
      幕張メッセ(千葉県千葉市)
    • Year and Date
      2015-05-26
    • Related Report
      2015 Research-status Report
  • [Presentation] 表面波の位相及び振幅を用いた北米大陸の高精度マッピング2015

    • Author(s)
      浜田 広太,吉澤 和範
    • Organizer
      日本地球惑星科学連合2015年大会
    • Place of Presentation
      幕張メッセ(千葉県千葉市)
    • Year and Date
      2015-05-26
    • Related Report
      2015 Research-status Report
  • [Presentation] On the effects of parameterization for radial anisotropy constrained by Love and Rayleigh waves2015

    • Author(s)
      Yoshizawa, K.
    • Organizer
      International Symposium on Structure and Dynamics of the Oceanic Lithosphere/Asthenosphere System
    • Place of Presentation
      ホテル松島大観荘(宮城県)
    • Year and Date
      2015-03-05
    • Related Report
      2014 Research-status Report
  • [Presentation] 上部マントル S 波鉛直異方性に対する地震表面波の分解能2014

    • Author(s)
      吉澤 和範
    • Organizer
      日本地震学会2014年秋季大会
    • Place of Presentation
      朱鷺メッセ新潟コンベンションセンター(新潟県)
    • Year and Date
      2014-11-26
    • Related Report
      2014 Research-status Report
  • [Presentation] 2観測点間の表面波振幅比を用いた北米大陸の位相速度分布2014

    • Author(s)
      浜田 広太,吉澤 和範
    • Organizer
      日本地震学会2014年秋季大会
    • Place of Presentation
      朱鷺メッセ新潟コンベンションセンター(新潟県)
    • Year and Date
      2014-11-25
    • Related Report
      2014 Research-status Report
  • [Presentation] Mapping the upper mantle with multi-mode surface waves: Lithosphere-ashtenosphere transition and radial anisotropy2014

    • Author(s)
      Yoshizawa, K., Kennett, B.L.N.
    • Organizer
      The 14th International Symposium on Study of the Earth's Deep Interior
    • Place of Presentation
      湘南国際村センター(神奈川県)
    • Year and Date
      2014-08-01
    • Related Report
      2014 Research-status Report
    • Invited
  • [Presentation] The Lithosphere-Asthenosphere Transition and Radial Anisotropy Beneath Australian Continent2014

    • Author(s)
      Yoshizawa, K.
    • Organizer
      Asia and Oceania Geoscieces Society 11th Annual Meeting
    • Place of Presentation
      ロイトン札幌(北海道)
    • Year and Date
      2014-07-30
    • Related Report
      2014 Research-status Report
    • Invited
  • [Presentation] Inter-station phase and amplitude measurements of surface waves for high-resolution regional-scale tomography in North America2014

    • Author(s)
      Hamada, K., Yoshizawa, K.
    • Organizer
      Asia and Oceania Geoscieces Society 11th Annual Meeting
    • Place of Presentation
      ロイトン札幌(北海道)
    • Year and Date
      2014-07-30
    • Related Report
      2014 Research-status Report
  • [Presentation] Surface-wave phase velocity maps of North America with inter-station waveform analysis2014

    • Author(s)
      Hamada, K., Yoshizawa, K.
    • Organizer
      Japan Geosciences Union
    • Place of Presentation
      パシフィコ横浜(神奈川県)
    • Year and Date
      2014-04-29
    • Related Report
      2014 Research-status Report
  • [Presentation] Estimation of the lithosphere-asthenosphere transition from multi- mode surface waves2014

    • Author(s)
      Yoshizawa, K.
    • Organizer
      Japan Geosciences Union
    • Place of Presentation
      パシフィコ横浜(神奈川県)
    • Year and Date
      2014-04-28
    • Related Report
      2014 Research-status Report
  • [Remarks] 大陸プレート下面の3Dマッピング

    • URL

      http://noreply.sci.hokudai.ac.jp/research/index.html#research03

    • Related Report
      2014 Research-status Report

URL: 

Published: 2014-04-04   Modified: 2018-03-22  

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