Breakdown of seamounts at the trench axis, viewed from gravity anomaly

Gi-Churl SHIN; Yoshibumi TOMODA

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Breakdown of seamounts at the trench axis, viewed from gravity anomaly

机译：从重力异常观察沟槽轴上的海山击穿

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The Daiichi-Kashima seamount in the Japan trench and a wedge shaped seamount in the Ogasawara trench are good examples that the seamount breaks down and sink at the axis of the trench. We estimated subterranean structure of these seamounts using gravity anomaly and topography, and proposed a model. Disappearance of a deep root of the mountain in the upper mantle supporting the mass of the mountain, can explain the phenomena. It is suspected that main reason of disappearance of the root is due to compression caused by the bending of the plate near the trench.

机译：Daiichi-Kashima Seamount在日本沟槽和ogasawara沟槽中的楔形海山是良好的例子，即海山在沟槽的轴上塌陷并沉入。我们使用重力异常和地形估计了这些海山的地下结构，并提出了模型。在支持山块质量的上部地幔中消失了山的深层，可以解释现象。怀疑，根除根部失踪的主要原因是由于沟槽附近板的弯曲引起的压缩。

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《Proceedings of the Japan Academy, Series B. Physical and Biological Sciences》 |2006年第3期|共6页
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Gi-Churl SHIN; Yoshibumi TOMODA;
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3. Evolution of the Deep Structure of Seamounts Viewed from Gravity Anomaly [J] . Yoshibumi TOMODA, Yukihide AKIYAMA Proceedings of the Japan Academy, Series B. Physical and Biological Sciences . 2006,第8期

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6. Progressive hemiparesis due to spino-laminar anomaly of the axis—a case report and literature review [O] . Srivijayanand K. S, Ankith Naduvanahalli Vivekanandaswamy, Ajoy Prasad Shetty, 2019

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7. Seismic structure of the subducting seamounts on the trench axis: Erimo Seamount and Daiichi-Kashima Seamount, northern and southern ends of the Japan Trench [O] . 2009

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Breakdown of seamounts at the trench axis, viewed from gravity anomaly

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