Characteristics and formation mechanism of cold seep system in the northeastern continental slope of South China Sea from sub-bottom profiler data | |
Liu Bo-Ran1,2; Song Hai-Bin3; Guan Yong-Xian4; Bai Yang3; Chen Jiang-Xin1,2; Geng Ming-Hui1,2 | |
刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
![]() |
2015 | |
卷号 | 58期号:1页码:247-256 |
关键词 | Cold seep Sub-bottom profiler Shallow gas Acoustic void Fluid migration |
ISSN号 | 0001-5733 |
DOI | 10.6038/cjg20150122 |
文献子类 | Article |
英文摘要 | Gas Hydrate reservoir in the northeastern continental slope of South China Sea(SCS) have been confirmed by investigations and well drillings. Also, large amounts of methane-derived authigenic carbonates (MADC) were discovered in 2004 among this area. Based on sub-bottom profiles and seismic profiles, attributes and features associated with cold seepage system in the northeastern continental slope of SCS were analyzed. A seismic line cross the northeastern continental slope of SCS was used to show local sedimentary environment. Sub-bottom data were pieced together and denoised. Shallow gas, fluid migration and morphology features associated with cold seepage in processed sub-bottom profile were identified and discussed, with assistance of corresponding seismic lines and bathymetric charts. From observation of sub-bottom profiles and comparison with seismic and bathymetry data, cold seepage related features were listed as follow: (1) Acoustic plume (suspected of being cold seep) was found in a sub-bottom profile, with height of about 30 meters and width of 50 meters. (2) Mud volcanoes were found in this area, and caused discontinuity of Bottom Simulating Reflectors in seismic profiles. (3) Acoustic voids, the most frequent features in this region, had two types: "narrow" acoustic void and "broad" acoustic void. "narrow" acoustic void had width of 80 similar to 400 m and no layers information, "broad" acoustic void had width over 1000m and weak layers information. (4) The area of "narrow" acoustic void overlaid with mud volcanoes concentrated area, and the acoustic plume was located around "broad" acoustic voids. Cold seepage activities exist on the northeastern continental slope of SCS, both in history and in present. The results suggest that "narrow" acoustic voids on sub-bottom profiler correspond to fluid migration path, while "broad" acoustic voids possibly related with shallow gas accumulation along rock layers. The relationship between cold seepage system and gas hydrate in the northeastern continental slope of SCS worth further investigation. |
WOS关键词 | MUD VOLCANOS ; METHANE SEEPS ; SHALLOW GAS ; CARBONATES ; SEDIMENTS ; FEATURES ; HYDRATE ; MARGIN ; FLOOR ; GULF |
WOS研究方向 | Geochemistry & Geophysics |
语种 | 英语 |
出版者 | SCIENCE PRESS |
WOS记录号 | WOS:000349136200022 |
内容类型 | 期刊论文 |
源URL | [http://ir.iggcas.ac.cn/handle/132A11/86810] ![]() |
专题 | 中国科学院地质与地球物理研究所 |
通讯作者 | Liu Bo-Ran |
作者单位 | 1.Chinese Acad Sci, Key Lab Petr Resources Res, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Tongji Univ, State Key Lab Marine Geol, Shanghai 200092, Peoples R China 4.Guangzhou Marine Geol Survey, Guangzhou 510075, Guangdong, Peoples R China |
推荐引用方式 GB/T 7714 | Liu Bo-Ran,Song Hai-Bin,Guan Yong-Xian,et al. Characteristics and formation mechanism of cold seep system in the northeastern continental slope of South China Sea from sub-bottom profiler data[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2015,58(1):247-256. |
APA | Liu Bo-Ran,Song Hai-Bin,Guan Yong-Xian,Bai Yang,Chen Jiang-Xin,&Geng Ming-Hui.(2015).Characteristics and formation mechanism of cold seep system in the northeastern continental slope of South China Sea from sub-bottom profiler data.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,58(1),247-256. |
MLA | Liu Bo-Ran,et al."Characteristics and formation mechanism of cold seep system in the northeastern continental slope of South China Sea from sub-bottom profiler data".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 58.1(2015):247-256. |
个性服务 |
查看访问统计 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论