南海北部湾海域典型灾害地质类型及其声学反射特征

基于北部湾全新世环境演变与人类活动影响研究在北部湾东部海域获得的高分辨率地球物理资料，采用地震地层学研究方法对研究区浅部地层进行详细分析，发现存在多种潜在灾害地质因素，如埋藏古河道、浅部断层、泥底辟，浅层气，潮流沙脊等，这些灾害地质因素具有明显的声学反射特征。遵循简单实用的原则可将之分为具有活动能力的破坏性灾害地质因素和限制性灾害地质因素2类，同时对其成因进行了初步分析。这些潜在灾害地质因素是从事海洋工程活动时的极大隐患，应引起高度重视

Types of typical geological hazards in the Beibu Gulf of the South China Sea and their acoustic reflection features

This study discussed the high-resolution geophysical data obtained from the eastern sea area of Beibu Gulf from the aspects of the Holocene environmental evolution and human activities, and detailed the shallow strata using seismic stratigraphy. Many kinds of potential hazardous geological factors were identified, including buried paleo-channel, shallow faults, mud diapir, shallow gas and tidal sand ridge, which have obvious acoustic reflection features. These disasters can be simply and practically divided into two types: active destructive disaster geological factors and restricted disaster geological factors. This paper also analyzed the genesis of these disasters. It is indicated that these potential hazardous geological factors are great hidden dangers of marine engineering safety, and should attract much attention