Acoustic and biological characteristics of seafloor depressions in the North Yellow Sea Basin of China: Active fluid seepage in shallow water seafloor

doi:10.1016/j.margeo.2019.05.002

	Acoustic and biological characteristics of seafloor depressions in the North Yellow Sea Basin of China: Active fluid seepage in shallow water seafloor
	Liu, Xiaoyu 1,2,3; Feng, Xiuli 1,2; Sun, Yongfu 3; Chen, Yilan 3; Tang, Qiuhua 3; Zhou, Xinghua 3; Dong, Lifeng 3; Fan, Shiliang 3; Jiao, Pengfei 3; Wang, Kemeng 3
刊名	MARINE GEOLOGY
	2019-08
卷号	414 页码:34-46
关键词	Pockmark Seafloor seepage Paleo-channels Backscatter intensity Acoustic characteristics Northern Yellow Sea Basin
ISSN号	0025-3227
DOI	10.1016/j.margeo.2019.05.002
英文摘要	High resolution multibeam bathymetry revealed the occurrence of numerous craterlike depressions, so-called pockmarks, in the sea floor of the North Yellow Sea Basin (NYSB). To investigate whether these pockmarks are related to any type of fluid flow or gas seepage from subsurface stratum, acoustic survey and box samplings were conducted in a selected area containing several typical pockmarks. This allowed for an integrated analysis of the morphology, distribution, and subsurface strata as well as a direct comparison of seafloor characteristics among different areas inside and outside of a pockmark. Additionally, surface sediments were analyzed for particle structure and grain size. Based on the combination of multibeam bathymetry and backscatter intensity data, 282 seafloor depressions were accurately identified. Moreover, the formation of pockmark can be attributed to existence of gas chimneys and other shallow gases revealed by shallow seismic profile records in the subsurface strata. Sediments inside and outside the pockmark showed remarkable discrepancies in terms of grain size, and benthic fauna. Additionally, strong internal reflection area was observed inside the depressions where benthic habitats are abundant and sediments contain strawberry pyrite and carbonate cementation. Side scan sonar also recorded sediment plumes in the water column, which indicates that the pockmarks are still active. Several "pearl-string-like" accumulations of pockmark were found in the study area, which well agree with the distribution of buried channels and lakes. These results thus provide new insights in interpreting shallow water fluid seepage, with implications for our current knowledge of overall sedimentation process in offshore continental shelves.
WOS关键词	AUTHIGENIC CARBONATES ; SUBAQUEOUS DELTA ; POCKMARK FIELDS ; MORPHOLOGY ; EVOLUTION ; MECHANISM
WOS研究方向	Geology ; Oceanography
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000474325700003
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/24615]
专题	自然资源部第一海洋研究所
通讯作者	Sun, Yongfu
作者单位	1.Ocean Univ China, MOE, Key Lab Submarine Geosci & Prospecting Tech, Qingdao 266100, Shandong, Peoples R China 2.Ocean Univ China, Coll Marine Geosci, Qingdao 266100, Shandong, Peoples R China 3.SOA, Inst Oceanog 1, Qingdao 266061, Shandong, Peoples R China 4.Natl Marine Environm Monitoring Ctr, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Liu, Xiaoyu,Feng, Xiuli,Sun, Yongfu,et al. Acoustic and biological characteristics of seafloor depressions in the North Yellow Sea Basin of China: Active fluid seepage in shallow water seafloor[J]. MARINE GEOLOGY,2019,414:34-46.
APA	Liu, Xiaoyu.,Feng, Xiuli.,Sun, Yongfu.,Chen, Yilan.,Tang, Qiuhua.,...&Lu, Bo.(2019).Acoustic and biological characteristics of seafloor depressions in the North Yellow Sea Basin of China: Active fluid seepage in shallow water seafloor.MARINE GEOLOGY,414,34-46.
MLA	Liu, Xiaoyu,et al."Acoustic and biological characteristics of seafloor depressions in the North Yellow Sea Basin of China: Active fluid seepage in shallow water seafloor".MARINE GEOLOGY 414(2019):34-46.