Continental Crust, Crustal Underplating, and Low- <b> <i>Q</i> </b> Upper Mantle Beneath an Oceanic Island Arc

DOI Web Site 被引用文献92件
  • Kiyoshi Suyehiro
    K. Suyehiro, N. Takahashi, Y. Ariie, Y. Yokoi, H. Tokuyama, A. Taira, Ocean Research Institute, University of Tokyo, Tokyo 164, Japan.
  • Narumi Takahashi
    K. Suyehiro, N. Takahashi, Y. Ariie, Y. Yokoi, H. Tokuyama, A. Taira, Ocean Research Institute, University of Tokyo, Tokyo 164, Japan.
  • Yoshiro Ariie
    K. Suyehiro, N. Takahashi, Y. Ariie, Y. Yokoi, H. Tokuyama, A. Taira, Ocean Research Institute, University of Tokyo, Tokyo 164, Japan.
  • Yasutaka Yokoi
    K. Suyehiro, N. Takahashi, Y. Ariie, Y. Yokoi, H. Tokuyama, A. Taira, Ocean Research Institute, University of Tokyo, Tokyo 164, Japan.
  • Ryota Hino
    R. Hino, Faculty of Science, Tohoku University, Sendai 981, Japan.
  • Masanao Shinohara
    M. Shinohara, Department of Earth Sciences, Chiba University, Chiba 263, Japan.
  • Toshihiko Kanazawa
    T. Kanazawa and N. Hirata, Earthquake Research Institute, University of Tokyo, Tokyo 113, Japan.
  • Naoshi Hirata
    T. Kanazawa and N. Hirata, Earthquake Research Institute, University of Tokyo, Tokyo 113, Japan.
  • Hidekazu Tokuyama
    K. Suyehiro, N. Takahashi, Y. Ariie, Y. Yokoi, H. Tokuyama, A. Taira, Ocean Research Institute, University of Tokyo, Tokyo 164, Japan.
  • Asahiko Taira
    K. Suyehiro, N. Takahashi, Y. Ariie, Y. Yokoi, H. Tokuyama, A. Taira, Ocean Research Institute, University of Tokyo, Tokyo 164, Japan.

抄録

<jats:p> A detailed structural model of the crust, subducting slab, and underlying upper mantle across the northern Izu-Ogasawara (Bonin) island arc system is derived from a marine seismic reflection and ocean bottom seismographic refraction survey and subsequent forward modeling combined with tomographic inversion. The model indicates that the crust is thickest beneath the presently active rift zone and a granitic crust may have formed in the mid-crust. A highly attenuative mantle (that is, one with low quality <jats:italic>Q</jats:italic> ) seems to be confined mainly beneath the presently active rift zone. In contrast, high <jats:italic>P</jats:italic> -wave velocity persists in the lower crust between the forearc and eastern margin of the back arc basin, suggesting a large-scale magma input responsible for the arc formation. </jats:p>

収録刊行物

  • Science

    Science 272 (5260), 390-392, 1996-04-19

    American Association for the Advancement of Science (AAAS)

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