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摘要:
根据2014—2017年在霞浦近岸海域实测得的约3 500 km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。
Abstract:About 3500km 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 paleo- channels, 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.
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Key words:
- geohazard factor /
- shallow gas /
- paleo-channel /
- coastal area of northern Fujian
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表 1 闽北近岸海域潜在灾害地质因素分类
Table 1. Classification of potential marine geo-hazards in North of Fujian coastal area
存在位置 潜在灾害地质因素 海底表层 楔形泥质体、水下浅滩、海岸线变迁 海底埋藏 埋藏古河道、浅层气、浅埋不规则基岩面、埋藏沙脊 
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