Common Reflection Angle Migration Revealing the Complex Deformation Structure beneath Forearc Basin in the Nankai Trough

K. Shiraishi, M. Robb, K. Hosgood, Y. Yamada

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

抄録

In order to better understand the deformation structures within the thick accreted sediments beneath forearc basin, we apply an advanced beam migration to a legacy 2D seismic data acquired in the deep-water area in the Nankai Trough, Japan. In this region, many seismic surveys have been conducted to study the geophysical and geological features in the seismogenic zone related to the plate subduction. However, the details in the accreted sediments beneath the Kumano forearc basin are still unclear due to the poor seismic images caused by difficult geological structures. The common reflection angle migration is an advanced depth migration technology and an effective method for imaging such complex structures. By applying this method, deeper reflections that were difficult to image previously are clearly revealed. The newly imaged geometric features (e.g., the folds in the shallow part and the deep reflectors with stepwise discontinuities and the land-ward thickening of the lower layer) implies that the deformation is characterized by development of multiple thrust faults in the thick accreted sediments. The common reflection angle migration provides new seismic evidences that are essential for understanding the Nankai Trough seismogenic zone and the accretionary prism development.

本文言語英語
ホスト出版物のタイトル80th EAGE Conference and Exhibition 2018
ホスト出版物のサブタイトルOpportunities Presented by the Energy Transition
出版社European Association of Geoscientists and Engineers, EAGE
ISBN(電子版)9789462822542
DOI
出版ステータス出版済み - 2018
外部発表はい
イベント80th EAGE Conference and Exhibition 2018: Opportunities Presented by the Energy Transition - Copenhagen, デンマーク
継続期間: 6 11 20186 14 2018

出版物シリーズ

名前80th EAGE Conference and Exhibition 2018: Opportunities Presented by the Energy Transition

会議

会議80th EAGE Conference and Exhibition 2018: Opportunities Presented by the Energy Transition
国/地域デンマーク
CityCopenhagen
Period6/11/186/14/18

All Science Journal Classification (ASJC) codes

  • 地球物理学
  • 地球化学および岩石学

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