Initiation of plate boundary slip in the Nankai Trough off the Muroto peninsula, southwest Japan

Takeshi Tsuji, Toshifumi Matsuoka, Yasuhiro Yamada, Yasuyuki Nakamura, Juichiro Ashi, Hidekazu Tokuyama, Shin'ichi Kuramoto, Nathan L. Bangs

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

To investigate variations in physical properties accompanying the development of the décollement, we used a neural network analysis of seismic attributes derived from 3D seismic reflection data gathered in the Nankai Trough convergent margin off the Muroto peninsula of southwest Japan. This analysis resulted in a detailed map of the geological features along the décollement and revealed a drastic change in physical properties at the sole of the protothrust. Ocean Drilling Program (ODP) data suggest that the décollement physical property change coincides with the initiation of slip. Furthermore, changes in the structure of the accretionary prism and reorganization of the décollement geometry also attend the initiation of plate boundary slip.

Original languageEnglish
Pages (from-to)1-5
Number of pages5
JournalGeophysical Research Letters
Volume32
Issue number12
DOIs
Publication statusPublished - Jun 28 2005
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

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