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Offshore Fault Geometrics in the Pearl River Estuary, Southeastern China: Evidence from Seismic Reflection Data
Cao, JH; Xia, SH; Sun, JL; Zhao, F; Wan, KY; Xu, HL; sunjl@scsio.ac.cn
2018
发表期刊JOURNAL OF OCEAN UNIVERSITY OF CHINA
卷号17期号:4页码:799-810
摘要The Pearl River Estuary (PRE) is located at the onshore-offshore transition zone between South China and South China Sea Basin, and it is of great significant value in discussing tectonic relationships between South China block and South China Sea block and seismic activities along the offshore active faults in PRE. However, the researches on geometric characteristics of offshore faults in this area are extremely lacking. To investigate the offshore fault distribution and their geometric features in the PRE in greater detail, we acquired thirteen seismic reflection profiles in 2015. Combining the analysis of the seismic reflection and free-air gravity anomaly data, this paper revealed the location, continuity, and geometry of the littoral fault zone and other offshore faults in PRE. The littoral fault zone is composed of the major Dangan Islands fault and several parallel, high-angle, normal faults, which mainly trend northeast to northeast-to-east and dip to the southeast with large displacements. The fault zone is divided into three different segments by the northwest-trending faults. Moreover, the basement depth around Dangan Islands is very shallow, while it suddenly increases along the islands westward and southward. These has resulted in the islands and neighboring areas becoming the places where the stress accumulates easily. The seismogenic pattern of this area is closely related to the comprehensive effect of intersecting faults together with the low velocity layer.
部门归属[Cao, Jinghe; Xia, Shaohong; Sun, Jinlong; Zhao, Fang; Wan, Kuiyuan; Xu, Huilong] Chinese Acad Sci, South China Sea Inst Oceanol, CAS Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China; [Wan, Kuiyuan] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
学科领域Oceanography
关键词[WOS]offshore active faults ; littoral fault zone ; Pearl River Estuary ; earthquake ; seismic reflection data
资助项目MSG
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/17125
专题中科院边缘海地质重点实验室
通讯作者sunjl@scsio.ac.cn
推荐引用方式
GB/T 7714
Cao, JH,Xia, SH,Sun, JL,et al. Offshore Fault Geometrics in the Pearl River Estuary, Southeastern China: Evidence from Seismic Reflection Data[J]. JOURNAL OF OCEAN UNIVERSITY OF CHINA,2018,17(4):799-810.
APA Cao, JH.,Xia, SH.,Sun, JL.,Zhao, F.,Wan, KY.,...&sunjl@scsio.ac.cn.(2018).Offshore Fault Geometrics in the Pearl River Estuary, Southeastern China: Evidence from Seismic Reflection Data.JOURNAL OF OCEAN UNIVERSITY OF CHINA,17(4),799-810.
MLA Cao, JH,et al."Offshore Fault Geometrics in the Pearl River Estuary, Southeastern China: Evidence from Seismic Reflection Data".JOURNAL OF OCEAN UNIVERSITY OF CHINA 17.4(2018):799-810.
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