High pore fluid pressure may cause silent slip in the Nankai Trough
High pore fluid pressure may cause silent slip in the Nankai Trough
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DOI：
10.1126/science.1096535
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发表时间：
2004-05-28
期刊：
影响因子：
56.9
通讯作者：
Kaneda, Y
中科院分区：
文献类型：
--
作者：
Kodaira, S;Iidaka, T;Kaneda, Y
在几个俯冲带已经发现了无声滑动事件，但这些事件的原因尚不清楚。利用地震成像，我们发现了东海无声滑动的原因，它发生在一个假定的大地震断层带。我们获得的地震图像显示，在俯冲洋壳中，位于俯冲脊下倾的高孔隙流体压力区。我们建议，这些结构有效地扩展了一个区域的条件稳定的滑动，从而产生无声的滑动。
Silent-slip events have been detected at several subduction zones, but the cause of these events is unknown. Using seismic imaging, we detected a cause of the Tokai silent slip, which occurred at a presumed fault zone of a great earthquake. The seismic image that we obtained shows a zone of high pore fluid pressure in the subducted oceanic crust located down-dip of a subducted ridge. We propose that these structures effectively extend a region of conditionally stable slips and consequently generate the silent slip.