The direct observation and interpretation of gas hydrate decomposition with ocean depth

doi:10.7185/geochemlet.2327

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

	The direct observation and interpretation of gas hydrate decomposition with ocean depth
	Ma, L.1,2,3,4; Luan, Z.1,2,3,4; Du, Z.1,2,3; Zhang, X.1,2,3,4; Zhang, Y.1,2,3,4; Zhang, X.1,2,3,4
刊名	GEOCHEMICAL PERSPECTIVES LETTERS
	2023-08-25
卷号	27 页码:9-14
ISSN号	2410-339X
DOI	10.7185/geochemlet.2327
通讯作者	Zhang, X.(xzhang@qdio.ac.cn)
英文摘要	An exposed gas hydrate (EGH) evolutional model as a function of water depth was established by in situ EGHs ascent experiments in cold seep areas of Haima (1509 m, 2.88 degrees C and 15.22 MPa), Lingshui (1760 m, 2.56 degrees C, 17.76 MPa and pH = 7.97) and Site F (1100 m, 3.57 degrees C, 11.09 MPa and pH = 7.69) in the South China Sea. A remotely operated vehicle was used to reproduce the in situ EGH ascent. Changes and temperature variations during EGH ascent were monitored in real time using a Raman insertion probe and dissolved oxygen sensor. The EGH ascent involved three stages of change: i) the metastable stage where no morphology changes, but where gas escapes and there is a decrease in internal temperature; ii) a second stage of coexistence of peripheral hydrate decomposition and internal hydrate growth; iii) a third stage of internal hydrate decomposition at shallower depths. Experimental results indicated that EGHs can carry gas bubbles to shallow depths and even to the sea surface. This could be an important transport mode for cold seep gases affecting shallow waters or the atmosphere.
资助项目	National Natural Science Foundation of China[52001303] ; National Natural Science Foundation of China[92058206] ; National Natural Science Foundation of China[42221005] ; National Natural Science Foundation of China[41822604] ; National Natural Science Foundation of China[42049582] ; Strategic Priority Research Program, CAS[XDB42040302] ; Young Taishan Scholars Program[tsqn201909158] ; Key Project of Ocean Research Center, Chinese Academy of Sciences[COMS2020J03]
WOS关键词	IN-SITU ; METHANE HYDRATE ; DEEP-SEA ; STABILITY ; BUBBLE ; CARBON ; SEEPS ; SLOPE ; VENT
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	EUROPEAN ASSOC GEOCHEMISTRY
WOS记录号	WOS:001144160800002
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/184392]
专题	海洋研究所_海洋地质与环境重点实验室
通讯作者	Zhang, X.
作者单位	1.LaoShan Lab, Lab Marine Geol, Qingdao 266061, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Ctr Ocean Mega Sci, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Ctr Deep Sea Res, Ctr Ocean Mega Sci, Qingdao 266071, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Ma, L.,Luan, Z.,Du, Z.,et al. The direct observation and interpretation of gas hydrate decomposition with ocean depth[J]. GEOCHEMICAL PERSPECTIVES LETTERS,2023,27:9-14.
APA	Ma, L.,Luan, Z.,Du, Z.,Zhang, X.,Zhang, Y.,&Zhang, X..(2023).The direct observation and interpretation of gas hydrate decomposition with ocean depth.GEOCHEMICAL PERSPECTIVES LETTERS,27,9-14.
MLA	Ma, L.,et al."The direct observation and interpretation of gas hydrate decomposition with ocean depth".GEOCHEMICAL PERSPECTIVES LETTERS 27(2023):9-14.