Crustal structure of Bohai Sea and adjacent area (North China) from two onshore-offshore wide-angle seismic survey lines

doi:10.1016/j.jseaes.2014.11.034

	Crustal structure of Bohai Sea and adjacent area (North China) from two onshore-offshore wide-angle seismic survey lines
	Liu, Lihua 1,4; Hao, Tianyao 1; Lu, Chuanchuan 1,4; You, Qingyu 1; Pan, Jun 2; Wang, Fuyun 3; Xu, Ya 1; Zhao, Chunlei 1; Zhang, Jianshi 3
刊名	JOURNAL OF ASIAN EARTH SCIENCES
	2015-02
卷号	98 页码:457-469
关键词	Ocean Bottom Seismometer (OBS) Tancheng-Lujiang Fault Zone Zhangjiakou-Penglai Fault Zone North China Craton (NCC) Wide-angle seismic survey
ISSN号	1367-9120
DOI	10.1016/j.jseaes.2014.11.034
英文摘要	In 2010 and 2011 onshore-offshore surveys along two lines in the Bohai area were carried out. This paper presents the deep structure from wide-angle seismic data along the two lines, and try to improve the reliability of deep interfaces by using of the CMP prospecting method. The result is as follows. (1) The environmental noise of records from OBSs in shallow water area is stronger than that from deep waters. (2) The CMP stacking method is potential for high-density OBS surveys. (3) The thickness of sedimentary layer in Bohai Sea and surrounding area is 3-5 km, the velocity increases with depth from about 2 km/s at the seafloor to about 4.5 km/s on the sedimentary basement. (4) The upper crust thins toward the sea area from the land area, the middle and lower crust also vary insignificantly; the middle crust is about 4 km and the lower crust is about 15 km; the velocities of the middle and lower crust shows gentle variation in vertical but obvious in lateral due to the impact of fault zones. (5) The velocity contours nearby the Tancheng-Lujiang (TLFZ) and Zhangjiakou-Penglai (ZPFZ) Fault Zones are U-shaped, where the velocity changes laterally and the interface undulates significantly; velocity disturbances exist in the crustmantle transition zone at the fault zones; the TLFZ and ZPFZ could be the upwelling channels of deep material. (6) In the eastern part of North China Craton (NCC), the Moho gently ranges at the depth of about 30 km with local rises; lithosphere thinning occurred predominantly at the top of upper mantle; the east boundary of lithosphere thinning is inferred to be on the east of Bohai Sea. (C) 2014 Elsevier Ltd. All rights reserved.
资助项目	National High Technique RD Program (863)[2009AA093401] ; National High Technique RD Program (863)[2011ZX05008-006-30]
WOS研究方向	Geology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000348955800034
内容类型	期刊论文
源URL	[http://ir.fio.com.cn/handle/2SI8HI0U/3706]
专题	自然资源部第一海洋研究所
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China; 2.State Ocean Adm, Inst Oceanog 1, Qingdao 266061, Peoples R China; 3.China Earthquake Adm, Geophys Prospecting Ctr, Zhengzhou 450002, Peoples R China; 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Liu, Lihua,Hao, Tianyao,Lu, Chuanchuan,et al. Crustal structure of Bohai Sea and adjacent area (North China) from two onshore-offshore wide-angle seismic survey lines[J]. JOURNAL OF ASIAN EARTH SCIENCES,2015,98:457-469.
APA	Liu, Lihua.,Hao, Tianyao.,Lu, Chuanchuan.,You, Qingyu.,Pan, Jun.,...&Zhang, Jianshi.(2015).Crustal structure of Bohai Sea and adjacent area (North China) from two onshore-offshore wide-angle seismic survey lines.JOURNAL OF ASIAN EARTH SCIENCES,98,457-469.
MLA	Liu, Lihua,et al."Crustal structure of Bohai Sea and adjacent area (North China) from two onshore-offshore wide-angle seismic survey lines".JOURNAL OF ASIAN EARTH SCIENCES 98(2015):457-469.