Influencing factors and evaluation application of regional crustal stability in the Bohai Strait  

作　　者：Sai Mei Hong-xian Chu Ling-yu Dong Zhong-hua Fang Pan-feng Li Fei-fei Zhang Rui Shan Tie-hu Zhao 

机构地区：[1]Qingdao Institute of Marine Geology,China geological survey,Ministry of Natural Resources,Qingdao 266071,China [2]Laboratory for Marine Mineral Resources,Qingdao National Laboratory for Marine Science and Technology,Qingdao 266071,China

出　　处：《China Geology》2019年第3期354-363,共10页中国地质（英文）

基　　金：This work was supported by the National Natural Science Foundation of China (41506119,41276060);the Geological Investigation Project of China Geological Survey (201200504,DD20191003). Thanks Prof. Xu Jie,Zhang Lifang and other anonymous reviewers for their comments and suggestions,which significantly improved the quality of the manuscript.

摘　　要：Due to the extremely complex geological conditions in the Bohai Strait, active faults is very developed and earthquake activity occurs frequently. It is of great importance to evaluate the regional crustal stability for the planning and construction of the Trans-straits Passage. In this study, the authors carry out the evaluation by means of buffer analysis, topology analysis and overlay analysis based on ArcGIS software. The evaluation mainly analyzed six assessment factors of Bohai Strait including neotectonic activity, active faults distribution, seismicity, tectonic stress fields, Bouguer gravity anomaly and geological disasters. In brief, the crustal stability of the eastern North Yellow Sea Basin is best, while that of the Bohai Basin and southwest Bohai Strait is poor. Meanwhile, small and frequent earthquakes in the southern Strait and geological disasters developed in the northern and central Strait such as tidal ridge and shallow gas which may adversely impact on the Trans-straits Passage construction.

关 键 词：Regional CRUSTAL stability Trans-straits PASSAGE COASTAL GEOLOGICAL survey Engineering GIS Bohai STRAIT China 

分 类 号：P[天文地球]