摘要
根据2014—2017年在霞浦近岸海域实测得的约3 500km浅地层剖面和同网布设的单道地震剖面、侧扫声纳等地球物理资料,结合遥感影像和岸滩监测剖面等数据,综合运用海洋沉积学、层序地层学、构造地质学等方法,识别了研究区内存在的主要潜在海洋灾害地质因素,包括埋藏古河道、浅层气、浅埋不规则基岩面、楔形泥质体、潮流沙脊、海岸线变迁等,简要分析了其特征、成因机制和危害性,为探讨研究区的灾害地质防治奠定理论基础,为海洋资源开发及海洋工程建设提供科学依据。
About 3500 km of geophysical data were collected from the coastal area of Xiapu,Fujian province during the period from 2014 to 2017,which include measured shallow seismic stratigraphic profiles,single-channel seismic sections and side-scan sonars as well as remote sensing images and coastal monitoring profiles.Incorporated with the careful study of marine sedimentology,sequence stratigraphy and structural geology,various marine geo-hazards are discovered,such as buried paleochannels,shallow gas accumulations,shallow buried irregular bedrocks,muddy areas,tidal sand ridges,and abandoned coasts.We described and discussed the characteristics and genetic mechanism of these potential hazards in this paper in order to lay a foundation for further exploring geo-hazard factors in the study area so as to provide a scientific basis for marine resource development and marine engineering construction in the coastal areas along northern Fujian.
出处
《海洋地质前沿》
CSCD
2018年第11期52-59,共8页
Marine Geology Frontiers
基金
国家自然科学基金面上项目(41376079)
1:25万霞浦县幅海洋区域地质调查(GZH200900501)
关键词
海洋灾害地质
浅层气
埋藏古河道
闽北近岸海域
geohazard factor
shallow gas
paleo-channel
coastal area of northern Fujian
