SCSIO OpenIR  > 中科院边缘海地质重点实验室
Deep crustal structure of Baiyun Sag, northern South China Sea revealed from deep seismic reflection profile
Huang, CJ; Zhou, D; Sun, Z; Chen, CM; Hao, HJ; huangchunju@scsio.ac.cn; zhoudiscs@scsio.ac.cn
2005
Source PublicationCHINESE SCIENCE BULLETIN
ISSN1001-6538
Volume50Issue:11Pages:1131-1138
AbstractThis paper discusses deep crustal architecture of the Baiyun Sag of the Pearl River Mouth Basin, northern South China Sea based on velocity analysis, time-depth conversion and seismic interpretation of the deep seismic reflection profile DSRP-2002. The profile was acquired and processed to 14 S TWT by the China National Offshore Oil Corp. (CNOOC) in 2002. It extends across the Baiyun Sag of the Pearl River Mouth Basin, from the northern continental shelf of the SCS to the deepwater province. As the first deep seismic reflection profile in the Pearl River Mouth Basin, this profile reveals seismic phases from basement down to upper most mantle. The Moho surface appears in the profile as an undulating layer of varying thickness of 1-3 km. It is not a single reflector interface, but a velocity gradient or interconversion layer. The crust thins stepwisely from the shelf to the continental slope and the abyssal plain (from north to south), and also thins under depocenters. The crustal thickness is only 7 km in the depocenter of the main Baiyun Sag, which corresponds to a Moho upwelling mirroring the basement topography. In the lower slope and the ocean-continental transition zone of the southernmost portion of the profile, three sub-parallel, NW-dipping strong reflectors found at depths around 10-21 km are interpreted as indications of a subducted Mesozoic oceanic crust. Crustal faults exist in the northern and southern boundaries of the Baiyun Sag. The intense and persistent subsidence of the Baiyun Sag might be related to the long-term activity of the crustal faults.
DepartmentChinese Acad Sci, S China Sea Inst Oceanol, Guangzhou 510301, Peoples R China; China Natl Offshore Oil Corp, Guangzhou 510240, Peoples R China
KeywordDeep Seismic Reflection Profiles Crustal Structure Baiyun Sag NorThern Slope Of The South China Sea
Subject AreaMultidisciplinary Sciences
Indexed Bysci
Funding Project海洋地质
WOS IDWOS:000231712400014
Citation statistics
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/4856
Collection中科院边缘海地质重点实验室
Corresponding Authorhuangchunju@scsio.ac.cn; zhoudiscs@scsio.ac.cn
Recommended Citation
GB/T 7714
Huang, CJ,Zhou, D,Sun, Z,et al. Deep crustal structure of Baiyun Sag, northern South China Sea revealed from deep seismic reflection profile[J]. CHINESE SCIENCE BULLETIN,2005,50(11):1131-1138.
APA Huang, CJ.,Zhou, D.,Sun, Z.,Chen, CM.,Hao, HJ.,...&zhoudiscs@scsio.ac.cn.(2005).Deep crustal structure of Baiyun Sag, northern South China Sea revealed from deep seismic reflection profile.CHINESE SCIENCE BULLETIN,50(11),1131-1138.
MLA Huang, CJ,et al."Deep crustal structure of Baiyun Sag, northern South China Sea revealed from deep seismic reflection profile".CHINESE SCIENCE BULLETIN 50.11(2005):1131-1138.
Files in This Item:
File Name/Size DocType Version Access License
Deep crustal structu(1257KB) 开放获取--Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.