【摘要】：文章通過物理模擬和數(shù)值模擬相結(jié)合的方法,探討了海山在俯沖過程中自身出現(xiàn)的變化特征。結(jié)果表明,海山在增生楔體中俯沖時(shí),主要變化特征表現(xiàn)為其上覆的大洋沉積物的刮落,唯有海山尾部的洋殼有小部分大洋沉積物得以保存;當(dāng)海山開始進(jìn)入俯沖通道時(shí),海山逐漸由向陸殼之下硬擠入變?yōu)橄虻蒯锨?而向地幔的撓曲變形為海山進(jìn)入俯沖提供了充足的空間并使俯沖洋殼的俯沖角度增加。俯沖撓曲過程有效降低了陸殼與海山之間的耦合度,從而降低大震的發(fā)生概率。此外,文章也對(duì)多手段研究俯沖帶變形的嘗試進(jìn)行了探討。
[Abstract]:In this paper, the variation characteristics of seamounts in the process of subduction are discussed by means of physical simulation and numerical simulation. The results show that when the seamounts subduction in the accretive wedge, the main variation characteristics are the scraping and falling of the overlying ocean sediments, and only a small part of the oceanic crust in the tail of the seamounts can be preserved. When the seamounts begin to enter the subduction channel, the seamounts gradually change from hard squeezing under the continental crust to flexure to the mantle, and the flexure deformation of the mantle provides sufficient space for the seamounts to subduction and increases the subduction angle of the subduction oceanic crust. The subduction flexure process effectively reduces the coupling degree between the continental crust and seamounts, thus reducing the occurrence probability of large earthquakes. In addition, the attempt to study the deformation of subduction zone by multi-means is also discussed in this paper.
【作者單位】： 中國(guó)科學(xué)院南海海洋研究所中國(guó)科學(xué)院邊緣海地質(zhì)重點(diǎn)實(shí)驗(yàn)室;中國(guó)科學(xué)院大學(xué);
【基金】：國(guó)家重大油氣專項(xiàng)(2011ZX05025-003-005) 國(guó)家自然科學(xué)基金-廣東省聯(lián)合基金項(xiàng)目(U1301233)~~
【分類號(hào)】：P736.1

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