珠江口海域灾害地质因素及其与环境变化的关系  

Hazardous geology and its relationship with environmental evolution in the Pearl River Estuary

作　　者：孙杰[1] 詹文欢[1] 贾建业[2] 丘学林[1] 

机构地区：[1]中国科学院边缘海地质重点实验室,中国科学院南海海洋研究所,广东广州510301 [2]广东水利电力职业技术学院,广东广州510635

出　　处：《热带海洋学报》2010年第1期104-110,共7页Journal of Tropical Oceanography

基　　金：中国科学院边缘海地质重点实验室开放研究基金(MSGL08-24);中国科学院海洋地质与环境重点实验室开放课题(MGE2008KG02);广东省自然科学基金(07004206);广东省908专项(GD908-01-06)

摘　　要：珠江口海域地质环境比较复杂,孕育着多种灾害地质因素。通过收集的浅地层剖面、卫星遥感、钻孔资料及系统的野外调查,研究了珠江口海域灾害地质类型及其分布,编制了珠江口灾害地质示意图。珠江口海域灾害地质类型很多,可划分为新构造灾害地质、侵蚀堆积灾害地质、承压流体塑性体灾害地质、结构不均匀性灾害地质4个类型,包括活动断层、地震、浅层气、沙波、潮流沙脊、冲蚀槽沟、海岸侵蚀与淤积、陡坎、埋藏古河道、浅埋基岩面等。它们的分布范围很广且密集。新构造运动及晚更新世以来海平面变化,决定了珠江口海域复杂的海洋灾害地质类型及分布。珠江口众多的灾害地质问题将会对经济发展和海底工程建设安全构成潜在威胁,应该引起高度重视。The geological environments in the Pearl River Estuary are comparatively complicated and pregnant with hazardous geology factors. High-resolution seismic data, satellite remote sensing, borehole data and systematic survey have been used to examine marine hazardous geologic types and their distributions in the Pearl River Estuary; hazardous geologic maps of the estuary have been completed. The geological hazards are classified into neotectonic, erosive-deposit, fluid-plastic and heterogeneous hazardous geology types, including active fault, earthquake, coastal erosion, coastal accumulation, sand wave, tidal sand ridge, buried paleochannel, shallow gas, erosion gutter, shallow bedrock, among others. The scale of distribution of hazardous geologic types is large; the types of hazardous geology are complex and distributed in almost the whole area. Geologic environmental evolution including neotectonic movement and sea-level change since late Pleistocene decides the formation and regularity of geologic hazards. More attentions should be given to severe hazardous geologic phenomena that can greatly threaten regional economic development and engineering construction.

关 键 词：灾害地质因素 分布 地质环境 演变 珠江口 

分 类 号：P736.15[天文地球—海洋地质] X55[天文地球—海洋科学]