大陆边缘深水区海底滑坡及其不稳定性风险评估  

Submarine Landslide and Risk Evaluation on Its Instability in the Deepwater Continental Margin

作　　者：吴时国[1] 陈珊珊[1] 王志君[2] 李清平[2] 

机构地区：[1]中国石油大学地球资源与信息学院 [2]中国海洋石油有限公司北京研究中心,北京100029

出　　处：《现代地质》2008年第3期430-437,共8页Geoscience

基　　金：国家“863”计划(2006AA09209-6,2006AA9Z349);中国科学院知识创新重要方向项目(KZCX2-YW-203)

摘　　要：海底滑坡是大陆坡一种常见的沉积作用过程。这种沉积作用包括滑塌和碎屑流等重力流作用过程,它能将沉积物运移数百公里,严重危害深水油气开发平台、油气管线、海底电缆等设施;同时,还可能导致巨大破坏性的海啸。虽然导致海底滑坡的因素很多,但近年来发现海底滑坡的触发机制可能与地震作用和海底天然气水合物的分解关系密切。随着深水油田的开发和深海工程的日益增多,这种地质作用越来越引起学术界和工业界的重视。在介绍大陆边缘深水区海底滑坡的构成、识别和触发机制的基础上,提出海底滑坡的地质风险评估方法。Submarine landslide is usually a kind of sedimentary process, which includes landslide and debris flow, and can transport sediment over several hundred kilometers. Therefore it leads to large scale slope instability, and makes great threats to deepwater oil platform, pipeline and seafloor cable and so on. Moreover, slope instability can probably cause destructive tsunami. Although various factors can trigger submarine slide, but earthquake and dissolution of gas hydrate have close relationship with formation of submarine slide. With the exploitation of deepwater oil field and the increasing development of abysmal sea project, more and more emphases are laid on the geologic process by people of the the slide structure, identification criteria, triggering gin, and put forward the risk evaluation methods of academia and industry circles. In this paper, we introduce mechanism of landslide in the deepwater continental mar- submarine landslide.

关 键 词：海底滑坡 触发机制 海底不稳定性 天然气水合物 大陆坡 

分 类 号：P736.5[天文地球—海洋地质]