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How to image the structure-sensitive bodies in seismic prone zone from ACROSS

Research Project

Project/Area Number 17540396
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Solid earth and planetary physics
Research InstitutionShizuoka University

Principal Investigator

KUMAZAWA Mineo  Faculty of Science, Professor, 理学部, 教授 (60022571)

Co-Investigator(Kenkyū-buntansha) LIN Aiming  Graduate School of Science and Technology, Professor, 創造科学技術大学院, 教授 (90283861)
NIITSUMA Nobuaki  Faculty of Science, Professor, 理学部, 教授 (80005818)
SATOMURA Mikio  Faculty of Science, Professor, 理学部, 教授 (50126778)
MASUDA Toshiaki  Faculty of Science, Professor, 理学部, 教授 (30126164)
MICHIBAYASHI Katsuyoshi  Faculty of Science, Associate Professor, 理学部, 助教授 (20270978)
Project Period (FY) 2005 – 2006
Project Status Completed (Fiscal Year 2006)
Budget Amount *help
¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 2006: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2005: ¥1,700,000 (Direct Cost: ¥1,700,000)
KeywordsACROSS / active monitoring / structure sensitivity / 地震 / 能動観測 / 地震発生場 / 地殻物質 / マントル物質 / 結晶方位定向性 / 地球内部構造 / 高温高圧変形実験
Research Abstract

We have developed an active monitoring system named the ACROSS (Accurately Controlled Routinely Operated Signal System) in which a tensor transfer function with highly reliable error estimation. This approach will be the best way to discriminate very small temporal changes of the physical properties (material dispersion) and heterogeneous structures in the crust. Observation by ACROSS provides a tensor transfer (Green's) function sampled at finite discrete frequencies in a limited frequency range. From the Toki transmission site we have continuously transmitted circularly (horizontally) polarized seismic waves with modulated frequencies from 10 to 20 Hz for more than five years, and the acquired data by several permanent and temporary stations have been analyzed for various purposes to discriminate signals of the heterogeneous crust from various noises. We have found that the data acquired by seismic ACROSS often show highly frequency-dependent features. There are at least three possib … More le causes for it ; (1) frequency characteristics of the transmitted waves governed by nearby structure, (2) material dispersion of the propagating media, and (3) multi-path caused by heterogeneities of the media. Factor (1) could be largely eliminated, since it is common for all the receiving sites surrounding the transmitter. Different signatures of frequency dependencies of each tensor component of transfer function would also reflect from combinations of the above causes presumably material dispersion and heterogeneities of the propagating media. Now we have a basic data set on the frequency dependent vision (color vision) of the complex structures of the Earth's crust. In addition to Seismic ACROSS, we are developing Electromagnetic (EM-) ACROSS with a 600m long and 10A current dipole source in Shizuoka University, in order to physically visible images of reflectors and scatterers in the crust (More detailed description will be found in Nakajima et al., in this session).
(1) Observable phenomena :
Observable phenomena that can cause temporal variations of stress field related to generations of earthquakes and volcanic eruptions could be reflected to the scattered or reflected waves interacted with Active scattering sources. The heterogeneity in the lithosphere originated from both stress state and heterogeneous distribution of fluid-bearing rocks can be the scattering sources. Temporal variation of such scattering sources due to the structure sensitivity of rocks is an essential characteristics of seismogenic regions as well as the active volcanic regions. The active geophysical monitoring would be the essential tool to detect and clarify such an evolving process that governed by the structure sensitivity of rocks in the crust and upper mantle.
(2) Structure sensitive bodies :
Among many structure sensitive phenomena, probable changes in the reflected or scattered seismic or electromagnetic signals are expected. Temporal variations of impedance and anisotropic dispersion of the transmitted signals are likely to occur in the subduction zones where the scattering sources are evolving associated with the movement of the fluid mainly composed of supercritical water in the crust and upper mantle conditions. Recent discoveries of intermittent occurrence of slow slip events and deep non-volcanic tremors in the subduction zone could be one of the most challenging targets to clarify their characteristics by using the active monitoring techniques, as well as the dense networks of GPS and the seismometers (with tilt meters). Less

Report

(3 results)
  • 2006 Annual Research Report   Final Research Report Summary
  • 2005 Annual Research Report

Research Products

(21 results)

All 2007 2006 2005 Other

All Journal Article

  • [Journal Article] Development of a shear band cleavage as a result of strain partitioning.2007

    • Author(s)
      Michibayashi K., Murakami M.
    • Journal Title

      Journal of Structural Geology 02.003.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] 日本における固体圧変形実験装置の開発と研究の系譜2006

    • Author(s)
      熊澤峰夫, 清水以知子
    • Journal Title

      構造地質 49

      Pages: 5-14

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Annual Research Report 2006 Final Research Report Summary
  • [Journal Article] 固体圧変形実験装置MK65Sの設計と性能 : 内部摩擦の評価2006

    • Author(s)
      清水以知子, 道林克禎, 渡辺悠太, 増田俊明, 熊澤峰夫
    • Journal Title

      構造地質 49

      Pages: 15-26

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Annual Research Report 2006 Final Research Report Summary
  • [Journal Article] Seismic anisotropy in the uppermost mantle, back-arc region of the northeast Japan arc : petrophysical analyses of Ichinomegata peridotite xenoliths2006

    • Author(s)
      Michibayashi, K., Abe, N., Okamoto, A., Satsukawa, T., Michikura, K
    • Journal Title

      Geophysical Research Letters 33

    • NAID
      120000795166
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Annual Research Report 2006 Final Research Report Summary
  • [Journal Article] The effect of dynamic recrystallization on olivine fabric and seismic anisotropy : Insights from a ductile shear zone in the Oman ophiolite2006

    • Author(s)
      Michibayashi, K., Ina, T., Kanagawa, K.
    • Journal Title

      Earth and Planetary Science Letters 244

      Pages: 695-708

    • NAID
      120000795029
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Annual Research Report 2006 Final Research Report Summary
  • [Journal Article] Misorientations of garnet aggregate within a vein : Implications for timescale of vein formation during metamorphism2006

    • Author(s)
      Okamoto, A., Michibayashi, K.
    • Journal Title

      Journal of Metamorphic Geology 24

      Pages: 353-366

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Annual Research Report 2006 Final Research Report Summary
  • [Journal Article] かんらん岩の構造解析と地球内部のレオロジー2006

    • Author(s)
      道林克禎
    • Journal Title

      日本レオロジー学会誌 34

      Pages: 291-300

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Annual Research Report 2006 Final Research Report Summary
  • [Journal Article] Hantaro Nagaoka and his pioneering works in rock physics2006

    • Author(s)
      Kumazawa M.
    • Journal Title

      Japanese Journal of Structural Geology No. 49

      Pages: 83-86

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Development of the first solid-medium deformation apparatus in Japan : A historical review2006

    • Author(s)
      Kumazawa M., Shimizu I.
    • Journal Title

      Japanese Journal of Structural Geology No. 49

      Pages: 5-14

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Seismic anisotropy in the uppermost mantle, back-arc region of the northeast Japan arc : petrophysical analyses of Ichinomegata peridotite xenoliths.2006

    • Author(s)
      Michibayashi K., Abe N., Okamoto A., Satsukawa T., Michikura K.
    • Journal Title

      Geophysical Research Letters 33, L10312

    • NAID
      120000795166
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] The effect of dynamic recrystallization on olivine fabric and seismic anisotropy : Insights from a ductile shear zone in the Oman ophiolite.2006

    • Author(s)
      Michibayashi K., Ina T., Kanagawa K.
    • Journal Title

      Earth and Planetary Science Letters 244

      Pages: 695-708

    • NAID
      120000795029
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Misorientations of garnet aggregate within a vein : Implications for timescale of vein formation during metamorphism.2006

    • Author(s)
      Okamoto A., Michibayashi K.
    • Journal Title

      Journal of Metamorphic Geology 24

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Progressive shape evolution of a mineral inclusion under differential stress at high temperature : example of garnet inclusions within a granulite facies from the Lutow-Holm complex, East Antarctica.2005

    • Author(s)
      Okamoto A., Michibayashi K.
    • Journal Title

      Journal of Geophysical Research 110, B11203

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Propagation of seismic slip from brittle to ductile crust : Evidence from pseudotachylyte of the Woodroffe thrust, central Australia.2005

    • Author(s)
      Lin A., Maruyama T., Aaron S., Michibayashi K., Camacho A., Kano K.
    • Journal Title

      Tectonophysics 402

      Pages: 21-35

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Progressive shape evolution of a mineral inclusion under differential stress at high temperature : example of garnet inclusions within a granulite facies from the Lutow-Holm complex, east Antarctica2005

    • Author(s)
      Okamoto, A., Michibayashi, K.
    • Journal Title

      Journal of Geophysical Research 110

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Propagation of seismic slip from brittle to ductile crust : Evidence from pseudotachylyte of the Woodroffe thrust, central Australia2005

    • Author(s)
      Lin, A., Maruyama, T., Aaron, S., Michibayashi, K., Camacho, A., Kano, K.
    • Journal Title

      Tectonophysics 402

      Pages: 21-35

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Mapping non-asperities and continuous, active monitoring of the interior of the Earth's crust

    • Author(s)
      Tsuruga K., Kasahara J., Mikada H., Yamaoka K., Fujii N.
    • Journal Title

      Journal of Geography 115 (1)

      Pages: 51-71

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] 日本における固体圧変形実験装置の開発と研究の系譜

    • Author(s)
      熊澤峰夫, 清水以知子
    • Journal Title

      構造地質 印刷中

    • Related Report
      2005 Annual Research Report
  • [Journal Article] 固体圧変形実験装置MK65Sの設計と性能:内部摩擦の評価

    • Author(s)
      清水以知子, 道林克禎, 渡辺悠太, 増田俊明, 熊澤峰夫
    • Journal Title

      構造地質 印刷中

    • Related Report
      2005 Annual Research Report
  • [Journal Article] The effect of dynamic recrystallization on olivine fabric and seismic anisotropy : Insights from a ductile shear zone in the Oman ophiolite

    • Author(s)
      Michibayashi, K., Ina, T., Kanagawa, K.
    • Journal Title

      Earth and Planetary Science Letters 印刷中

    • NAID
      120000795029
    • Related Report
      2005 Annual Research Report
  • [Journal Article] Misorientations of garnet aggregate within a vein : Implications for timescale of vein formation during metamorphism

    • Author(s)
      Okamoto, A., Michibayashi, K.
    • Journal Title

      Journal of Metamorphic Geology 印刷中

    • Related Report
      2005 Annual Research Report

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Published: 2005-04-01   Modified: 2016-04-21  

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