DISTRIBUTION OF SHORTENING LANDWARD AND OCEANWARD OF THE EASTERN NANKAI TROUGH DUE TO THE IZU-OGASAWARA RIDGE COLLISION
DISTRIBUTION OF SHORTENING LANDWARD AND OCEANWARD OF THE EASTERN NANKAI TROUGH DUE TO THE IZU-OGASAWARA RIDGE COLLISION
复制标题
伊豆小笠原海脊碰撞导致南海东部海槽向陆和向海缩短的分布
DOI：
10.1016/0012-821x(95)00212-u
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发表时间：
1996
影响因子：
5.3
通讯作者：
N. Chamot‐Rooke
中科院分区：
文献类型：
--
作者：
X. Pichon;F. Pollitz;M. Fournier;J. Cadet;S. Lallemant;N. Chamot‐Rooke
菲律宾海板块和欧亚板块的会聚主要是通过沿着南海海槽以西约137.3°E的板块俯冲作用来实现的，但也受到东部广泛分布的陆上和海上变形的影响。这个带的总尺寸为200 km（与南海海槽平行）× 350 km，自大约1-2百万年前伊豆半岛与日本大陆碰撞以来，已发展成为一个高度耦合的区域。前在日本中部的陆上断层是一致的最大水平应力的WNW-ESE方向，而向海洋变形的驱动下扩散的西北-东南缩短伊豆小笠原火山脊，产生运动学不连续性相对于菲律宾海洋壳的西部。与1891年Nobi地震相关的应变释放和陆上变形作为一个整体，表明菲律宾海-欧亚大陆会聚部分地被敦贺湾-伊势湾构造线和伊豆半岛之间的陆上缩短所容纳。
The convergence of the Philippine Sea and Eurasia plates is accommodated primarily by plate subduction along the Nankai trough west of about 137.3°E, but additionally by widely distributed onshore and offshore deformation to the east. This zone, with a total dimension of 200 km (parallel to the Nankai trough) by 350 km, has developed as one highly coupled region since the collision of the Izu peninsula with mainland Japan about 1–2 m.y. ago. The onshore faulting in central Japan is consistent with a WNW-ESE direction of maximum horizontal stress, while the oceanward deformation is driven by diffuse NW-SE shortening of the Izu-Ogasawara volcanic ridge which produces a kinematic discontinuity with respect to the Philippine Sea oceanic crust to its west. The strain release associated with the 1891 Nobi earthquake, and the onshore deformation as a whole, suggests that the Philippine Sea-Eurasia convergence is partially accommodated by onshore shortening between the Tsuruga Bay-Ise Bay Tectonic Line and the Izu peninsula.