2001年5月
Deformation of a seamount subducting beneath an accretionary prism: Constraints from numerical simulation
GEOPHYSICAL RESEARCH LETTERS
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- 巻
- 28
- 号
- 9
- 開始ページ
- 1827
- 終了ページ
- 1830
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1029/2000GL012266
- 出版者・発行元
- AMER GEOPHYSICAL UNION
We examined the process of seamount subduction via a numerical simulation using the finite element method, applying a frictional force on the plate interface that is proportional to the normal stress. We calculate the incremental stress due to infinitesimal deformation of the seamount associated with subduction, and consider the implications for stress buildup and fracturing of the seamount itself. Our results show that the maximum shear stress concentrates at both flanks of the seamount, which suggests that fracturing will start there. We can surmise that, eventually, the seaward flank may be more apt to break than the landward flank at shallow depth if the confining pressure there is sufficiently low. We consider this to be a possible scenario for the generation of a thrust fault imaged at the seaward flank of the Muroto seamount, which is subducting under the Nankai trough accretionary prism.
- リンク情報
- ID情報
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- DOI : 10.1029/2000GL012266
- ISSN : 0094-8276
- Web of Science ID : WOS:000168243100040