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

doi:10.1029/2004GL021861

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 journal › Article › peer-review

23 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 language	English
Pages (from-to)	1-5
Number of pages	5
Journal	Geophysical Research Letters
Volume	32
Issue number	12
DOIs	https://doi.org/10.1029/2004GL021861
Publication status	Published - Jun 28 2005
Externally published	Yes

All Science Journal Classification (ASJC) codes

Geophysics
Earth and Planetary Sciences(all)

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10.1029/2004GL021861

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

abstract = "To investigate variations in physical properties accompanying the development of the d{\'e}collement, 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 d{\'e}collement and revealed a drastic change in physical properties at the sole of the protothrust. Ocean Drilling Program (ODP) data suggest that the d{\'e}collement physical property change coincides with the initiation of slip. Furthermore, changes in the structure of the accretionary prism and reorganization of the d{\'e}collement geometry also attend the initiation of plate boundary slip.",

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T1 - Initiation of plate boundary slip in the Nankai Trough off the Muroto peninsula, southwest Japan

AU - Tsuji, Takeshi

AU - Matsuoka, Toshifumi

AU - Yamada, Yasuhiro

AU - Nakamura, Yasuyuki

AU - Ashi, Juichiro

AU - Tokuyama, Hidekazu

AU - Kuramoto, Shin'ichi

AU - Bangs, Nathan L.

PY - 2005/6/28

Y1 - 2005/6/28

N2 - 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.

AB - 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.

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

Abstract

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