In situ Raman spectroscopy study of synthetic gas hydrate formed by cold seep flow in the South China Sea

doi:10.1016/j.jseaes.2018.02.003

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋地质与环境重点实验室

	In situ Raman spectroscopy study of synthetic gas hydrate formed by cold seep flow in the South China Sea
	Du, Zengfeng 1,2,3; Zhang, Xin 1,2,3,4; Xi, Shichuan 1,2,4; Li, Lianfu 1,2,4; Luan, Zhendong 1,2,3; Lian, Chao 1,2; Wang, Bing 1,2,4; Yan, Jun 1,2
刊名	JOURNAL OF ASIAN EARTH SCIENCES
	2018-12-01
卷号	168 页码:197-206
关键词	Synthetic gas hydrate In situ detection Raman spectroscopy Cold seep flow
ISSN号	1367-9120
DOI	10.1016/j.jseaes.2018.02.003
通讯作者	Zhang, Xin(xzhang@qdio.ac.cn)
英文摘要	Properties of gas hydrate are commonly investigated in laboratory by simulators or studied using the hydrate samples recovered from permafrost and marine sediments. Here synthetic gas hydrate (SGH) is quickly formed for the first time by fluids and bubbles erupted from the active cold seeps at the Formosa Ridge in the South China Sea (SCS). SGH samples are in situ detected by a Raman insertion probe for gas hydrate (RiP-Gh) which is deployed by the remotely operated vehicle (ROV) Faxian. Both spatial and temporal in situ Raman spectra of the SGH samples are acquired in order to determine the structure and the evolution of the synthetic gas hydrate. Authigenic carbonate debris or other debris serving as nucleation particles, which is found in the in situ Raman spectra of SGH samples for the first time, may be one factor that can promote the formation of synthetic gas hydrate. The gas-water interface demonstrated by the observation results, also contributes to the quick formation of SGH samples, which agrees well with the previous study. In situ Raman spectra of three SGH samples which have been placed on the seafloor for 0 h, 4 h and 21 h respectively are acquired. Laboratory Raman spectra of one sample which has been surprisingly found and recovered after 9840 h (410 days) since formed on the seafloor are also acquired. The Raman spectra of the four SGH samples indicate that the methane large-to-small cage occupancy ratios of the hydrates vary from 1.01 to 1.39, and the ratios of methane large-to-gas of the hydrates increase from 0.53 to 1.55. Overall, our work suggests a new explanation for the quick formation of gas hydrate compared to that in laboratory simulation work, and reveals the evolution of synthetic gas hydrate after quick formation, which provides a new insight for the study of natural gas hydrate.
资助项目	National Natural Science Foundation of China[41576104] ; Key Research Program of Frontier Sciences, CAS[QYZDB-SSW-DQC004] ; Open Research Project of National Major Science & Technology Infrastructure (RV KEXUE)[NMSTI-KEXUE2017K01] ; Strategic Priority Research Program, CAS[XDA11040301] ; Strategic Priority Research Program, CAS[XDA11030301] ; NSFC-Shandong Joint Fund for Marine Science Research Centers[U1606401] ; National Key R&D Program of China[2016YFC0302103] ; Taishan Scholar Project Funding[tspd20161007]
WOS研究方向	Geology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000452945000020
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/155826]
专题	海洋研究所_海洋地质与环境重点实验室
通讯作者	Zhang, Xin
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Ctr Deep Sea Res, Qingdao 266071, Peoples R China 3.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Du, Zengfeng,Zhang, Xin,Xi, Shichuan,et al. In situ Raman spectroscopy study of synthetic gas hydrate formed by cold seep flow in the South China Sea[J]. JOURNAL OF ASIAN EARTH SCIENCES,2018,168:197-206.
APA	Du, Zengfeng.,Zhang, Xin.,Xi, Shichuan.,Li, Lianfu.,Luan, Zhendong.,...&Yan, Jun.(2018).In situ Raman spectroscopy study of synthetic gas hydrate formed by cold seep flow in the South China Sea.JOURNAL OF ASIAN EARTH SCIENCES,168,197-206.
MLA	Du, Zengfeng,et al."In situ Raman spectroscopy study of synthetic gas hydrate formed by cold seep flow in the South China Sea".JOURNAL OF ASIAN EARTH SCIENCES 168(2018):197-206.