摘要
随着深水油气资源开发、天然气水合物试采和海底管线铺设等人类工程活动的日益增多,影响资源开采和工程施工的深海地质灾害备受关注。深海滑坡作为主要深海灾害,其不稳定性研究具有重要的科学意义和实际价值。本文总结了国内外深海滑坡的研究历程,梳理了深海滑坡的形态结构及类型、深海滑坡研究的方法手段,讨论了地震与断层活动、天然气水合物分解两个重要因素对深海斜坡不稳定性的影响。近十年来,随着一些新方法的涌现,研究热点已由深海滑坡的形态结构及分类等转移到深海滑坡的触发机制、滑动过程原位观测等方面。但现场调查技术、物理模拟试验和数值模拟试验仍是深海滑坡研究的主要方法手段,ROV/HOV等非常规技术也在逐步应用于深海滑坡的研究中。深海滑坡的产生通常是由海床内部地质作用和外部水动力作用共同引起,多种触发机制对深海滑坡的耦合作用及新触发机制对深海滑坡的影响仍是未来研究的重点。
Human engineering activities under the sea,such as the exploitation of deep-water oil and gas, the trial production of marine gas hydrates, and the construction of submarine pipelines, are rapidly increasing with time. They have attracted great attention from the geosociety since deep-sea geohazards often occur with those submarine resource extraction and engineering activities. Landslide is a kind of geohazard often happened in the deep sea, so the instability study of deep-sea landslides has become an important subject of marine scientific research.This paper is devoted to the research status and progress of deep-sea landslides both at home and abroad, and the morphological classification as well as research methods and means. The effects of earthquake, fault activity and gas hydrate decomposition on the instability of deep-sea slopes are discussed. In the past decade, with the emergence of some new research methods, the research focus of deep-sea landslide has shifted from the morphological classification to the trigger mechanisms and in-situ observation of deep-sea landslides. However, field investigation, physical simulation and numerical simulation still remain as the main means for the study of deep-sea landslides, and unconventional techniques, such as ROV/HOV are also gradually applied. Deep-sea landslides are usually caused by joint internal and external geological and hydrodynamic factors. The coupling effect of trigger mechanisms and the impact of new trigger mechanisms are still the focuses for future researches.
作者
宋晓帅
孙志文
朱超祁
范智涵
朱娜
贾永刚
于开宁
SONG Xiaoshuai;SUN Zhiwen;ZHU Chaoqi;FAN Zhihan;ZHU Na;JIA Yonggang;YU Kaining(Shandong Provincial Key Laboratory of Marine Environmental Geology Engineering,Ocean University of China,Qingdao 266100,China;Laboratory for Marine Geology,Qingdao National Laboratory for Marine Science and Technology,Qingdao 266061,China;Hainan Key Laboratory of Marine Geology Resources and Environment,Haikou 570206,China;Hebei Center for Ecological and Environmental Geology Research,Hebei GEO University,Shijiazhuang 050031,China)
出处
《海洋地质与第四纪地质》
CAS
CSCD
北大核心
2022年第1期222-235,共14页
Marine Geology & Quaternary Geology
基金
国家自然科学基金“内孤立波对南海水合物试采区海底面稳定性影响研究”(41831280)
河北省高校生态环境地质应用技术研发中心开放研究基金资助项目“南海北部珠江口盆地海底蠕变特征及成因研究”(JSYF-202103)
海南省海洋地质资源与环境重点实验室开放基金“黏土质海底滑坡渐进破坏过程与机理研究”(HNHYDZZYHJKF008)。
关键词
深海滑坡
形态结构
滑坡类型
稳定性分析
deep-water landslide
morphological structure
landslide types
stability analysis
