Changing Tectonic Regime During the Plio-Pleistocene in the Kinki Region

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概要

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• The location and continuity of active faults comprising a part of the Kinki region are clearly expressed in terms of topography. This area is the so-called Kinki Triangle; a region where many of Japan's active faults are concentrated within the triangle area. This study presents the results of seismic reflection surveys across active faults of the reverse fault systems (Yoro and Katata faults) and transcurrent fault system (Arima-Takatsuki Tectonic Line) forming the margins of the Kinki Triangle. The subsurface configurations of the active faults are interpreted in correlation with geomorphological, geological and geophysical information. On the basis of these seismic interpretations, the tectonic regime in the Kinki region is discussed. The results of this study are summarized as follows; it is likely that the compressional axis has likely changed from NW-SE to E-W in 2.7Ma to 0.6Ma as inferred from the growth structure by movement of active faults in the Kinki region. A time lag of this axis change is identified; starting in the northeast and shifting to the northwest of the region.

• 愛知教育大学の論文
• 2006-03-01

著者

• Toda Shigeru

  Department of Earth Sciences, Faculty of Education,Aichi University of Education

• Toda Shigeru

  Department Of Earth Sciences Faculty Of Education Aichi University Of Education

• Toda Shigeru

  Department Of Science (earth Sciences) Aichi University Of Education

• 戸田 茂

  Department of Science (Earth Sciences), Aichi University of Education

関連論文

• Seismic refraction and wide-angle reflection exploration by JARE-43 on Mizuho Plateau, East Antarctica
• Reflection profiling and velocity structure beneath Mizuho traverse route, East Antarctica
• P-wave velocity structure of the ice sheet and the shallow crust beneath the Mizuho traverse route, East Antarctica, from seismic refraction analysis
• Changing Tectonic Regime During the Plio-Pleistocene in the Kinki Region

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