摘要
本文从地震剖面、重磁异常、卫星照片、地貌特征、地层厚度、地壳形变、地震及火山分布等方面综合分析,认为琼州海峡主要发育NEE,NW及NE向三组断裂系,并对它们的活动性进行了初步的探讨。据根断裂的格局,把海峡划分为4个区域,并对这些区域进行了地震危险性及底质不稳定性分析,得出其稳定程度自高而低为海峡西Ⅰ区→海峡西Ⅱ区→海峡东Ⅱ区→海峡东Ⅰ区,其中西Ⅰ区为区域稳定性最好的地区,较适宜进行大型工程建设。
The thesis analyses seismic profiles, gravity and magnetic anomalies, sat-telite photographs, topographic characteristics, stratigraphic thicknesses, crustal deformations, distribution of earthquakes, Volcanics and so on. It is discovered that there are three fault systems (NEE, NW, and NE in direction) in the strait. Among them, the NEE and NW running fault systems dominate and constitute the framework of the faulting structures. The activities of the three fault systems are also discussed in the thesis.Based on the framework of faulting, the thesis evaluates the regional stability of the strait. The strait is divided into four regions. According to earthquake hazard and unstability of the sea-bed, these regions are ordered in a descending order of stability, as Strait West I Region→West Ⅱ Region→East I Region→East I Region. Among them, West I Region is the most stable one and is suitable for large-scaled engineering constructions.
出处
《热带海洋》
CSCD
1989年第4期70-77,共8页
