海山俯沖過程中的變形特征——物理模擬和數(shù)值模擬證據(jù)
發(fā)布時間:2019-04-19 20:08
【摘要】:文章通過物理模擬和數(shù)值模擬相結合的方法,探討了海山在俯沖過程中自身出現(xiàn)的變化特征。結果表明,海山在增生楔體中俯沖時,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;當海山開始進入俯沖通道時,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,文章也對多手段研究俯沖帶變形的嘗試進行了探討。
[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】: 中國科學院南海海洋研究所中國科學院邊緣海地質重點實驗室;中國科學院大學;
【基金】:國家重大油氣專項(2011ZX05025-003-005) 國家自然科學基金-廣東省聯(lián)合基金項目(U1301233)~~
【分類號】:P736.1
本文編號:2461241
[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】: 中國科學院南海海洋研究所中國科學院邊緣海地質重點實驗室;中國科學院大學;
【基金】:國家重大油氣專項(2011ZX05025-003-005) 國家自然科學基金-廣東省聯(lián)合基金項目(U1301233)~~
【分類號】:P736.1
【相似文獻】
相關期刊論文 前6條
1 俞聿修,桂滿海;波群的數(shù)值模擬和物理模擬[J];大連理工大學學報;1998年01期
2 李志軍;賈青;;冰對水工結構物作用力的物理模擬——Ⅱ.DUT-1模型冰物理和力學性能[J];黑龍江大學工程學報;2011年02期
3 王永學,李志軍,李廣偉;非凍結合成模型冰物理模擬冰作用力的試驗技術[J];冰川凍土;2003年S2期
4 劉青勇,董廣清,耿樹德,武曉峰,呂賢弼,唐杰;淡水帷幕防治海(咸)水入侵的物理模擬試驗研究[J];水利學報;1998年02期
5 徐子英;孫珍;周蒂;張云帆;孫龍濤;趙中賢;李付成;;軟弱地質體對擠壓構造變形影響的物理模擬及其應用[J];地球科學(中國地質大學學報);2011年05期
6 ;[J];;年期
相關會議論文 前1條
1 孫珍;Myra Keep;周蒂;;南海形成演化的三維物理模擬研究[A];中國地球物理學會第22屆年會論文集[C];2006年
,本文編號:2461241
本文鏈接:http://sikaile.net/kejilunwen/haiyang/2461241.html
最近更新
教材專著