A newly discovered ancient cold seep in the northwestern part of the South China Sea: Evidence from the authigenic carbonate

doi:10.1016/j.jseaes.2023.105835

CORC > 深海科学与工程研究所 > 中国科学院深海科学与工程研究所 > 深海科学研究部 > 深海地质与地球化学研究室

	A newly discovered ancient cold seep in the northwestern part of the South China Sea: Evidence from the authigenic carbonate
	Wei, Jiangong 5,6,7; Miao, Xiaoming 4; Wan, Zhifeng 3; Li, Jiwei 2; Xu, Hengchao 2; Li, Jiangtao 1; Wu, Tingting 6
刊名	JOURNAL OF ASIAN EARTH SCIENCES
	2023-10-15
卷号	256 页码:10
关键词	Cold seep Authigenic carbonate Fluid source Environmental conditions South China Sea
ISSN号	1367-9120
DOI	10.1016/j.jseaes.2023.105835
通讯作者	Miao, Xiaoming(xiaomingMr1992@126.com)
英文摘要	The cold seep activity creates a unique environment on the deep sea floor, and gave birth to a unique authigenic mineral- seep carbonate. In 2018, a new paleo-seep was discovered in the vicinity of the Ganquan Plateau using the manned submersible "Shenhaiyongshi" and seep carbonate samples were recovered. Here, we performed geochemical and mineralogical analyses on the seep carbonates. The results show that the seep carbonates (SY069) are mainly low-magnesium calcites with negative excursion in 813C values (-43.46 to -33.83 VPDB) and positive excursion in 818O values (2.10 to 3.80 VPDB), indicating that the carbonate formation is mainly affected by methane from gas hydrate dissociation. Meanwhile, the rare earth elements (REE) in the seep carbonates are enriched in middle REEs and there is no Ce anomaly (0.93 to 1.08) after the Post Archean Australian Shale standardization, indicating that the seep carbonates were formed in an anoxic environment. In addition, the Y/ Ho ratio is low (29.39 to 42.03), indicating a low methane flux. Therefore, it is suggested that SY069 carbonate rocks were formed in anaerobic environment with low methane flux. The above results are helpful for us to better understand the formation process of seep carbonates. Moreover, the Ganquan Plateau also be one of the hydrate occurrence areas, which is of great significance for us to explore the hydrate.
资助项目	National Key Research and Develop-ment Plan[2021YFC2800300] ; National Key Research and Develop-ment Plan[2016YFC0304905-03] ; National Natural Science Foundation of China[42276076]
WOS关键词	RARE-EARTH-ELEMENTS ; OXYGEN-ISOTOPE FRACTIONATION ; NORTHERN CONTINENTAL-SLOPE ; GAS HYDRATE ; ANAEROBIC OXIDATION ; FLUID SOURCES ; MASSIVE DISSOCIATION ; CERIUM ANOMALIES ; METHANE ; CONSTRAINTS
WOS研究方向	Geology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:001070516200001
资助机构	National Key Research and Develop-ment Plan ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.idsse.ac.cn/handle/183446/10506]
专题	深海科学研究部_深海地质与地球化学研究室
通讯作者	Miao, Xiaoming
作者单位	1.Tongji Univ, State Key Lab Marine Geol, Shanghai, Peoples R China 2.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Deep Sea Sci Div, Sanya 572000, Peoples R China 3.Sun Yat Sen Univ, Sch Marine Sci, Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai 519000, Peoples R China 4.Ocean Univ China, Coll Environm Sci & Engn, Qingdao 266100, Peoples R China 5.China Geol Survey, Acad South China Sea Geol Sci, Sanya 572025, Peoples R China 6.Guangzhou Marine Geol Survey, MLR Key Lab Marine Mineral Resources, Guangzhou 510075, Peoples R China 7.Sanya Inst South China Sea Geol, Guangzhou Marine Geol Survey, Sanya 572025, Peoples R China
推荐引用方式 GB/T 7714	Wei, Jiangong,Miao, Xiaoming,Wan, Zhifeng,et al. A newly discovered ancient cold seep in the northwestern part of the South China Sea: Evidence from the authigenic carbonate[J]. JOURNAL OF ASIAN EARTH SCIENCES,2023,256:10.
APA	Wei, Jiangong.,Miao, Xiaoming.,Wan, Zhifeng.,Li, Jiwei.,Xu, Hengchao.,...&Wu, Tingting.(2023).A newly discovered ancient cold seep in the northwestern part of the South China Sea: Evidence from the authigenic carbonate.JOURNAL OF ASIAN EARTH SCIENCES,256,10.
MLA	Wei, Jiangong,et al."A newly discovered ancient cold seep in the northwestern part of the South China Sea: Evidence from the authigenic carbonate".JOURNAL OF ASIAN EARTH SCIENCES 256(2023):10.