Characterization of Geochemistry in Hydrothermal Sediments From the Newly Discovered Onnuri Vent Field in the Middle Region of the Central Indian Ridge

doi:10.3389/fmars.2022.810949

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

	Characterization of Geochemistry in Hydrothermal Sediments From the Newly Discovered Onnuri Vent Field in the Middle Region of the Central Indian Ridge
	Lim, Dhongil 5,6; Kim, Jihun 5,6; Kim, Wonnyon 6; Kim, Jonguk 6; Kim, Dongsung 6; Zhang, Le 4; Kwack, Kyungun 6; Xu, Zhaokai 1,2,3
刊名	FRONTIERS IN MARINE SCIENCE
	2022-02-11
卷号	9 页码:16
关键词	hydrothermal sediments talc and barite geochemistry serpentinization Central Indian ridges
DOI	10.3389/fmars.2022.810949
通讯作者	Lim, Dhongil(oceanlim@kiost.ac.kr) ; Xu, Zhaokai(zhaokaixu@qdio.ac.cn)
英文摘要	The recently discovered Onnuri hydrothermal vent field (OVF) is a typical off-axis ultramafic-hosted vent system, located on the summit of the dome-like ocean core complex (OCC) at a distance of similar to 12 km from the ridge axis along the middle region of the Central Indian Ridge (CIR). The plume chemistry with high methane anomaly was consistent with the precursor of hydrothermal activity; however, the fundamental characteristic of the OVF system, such as the hydrothermal circulation process and source of heat, remains poorly understood. Here, we focus on the geochemical features of surface sediments and minerals collected at and around the OVF region in order to better understand this venting system. The results reveal that the OVF sediments are typified by remarkably high concentrations of Fe, Si, Ba, Cu, and Zn, derived from hydrothermal fluid and S and Mg from seawater; depleted C-S isotope compositions; and abundant hydrothermally precipitated minerals (i.e., Fe-Mn hydroxides, sulfide and sulfate minerals, and opal silica). Notably, the occurrence of pure talc and barite bears witness to strong hydrothermal activity in the OVF, and their sulfur and strontium isotope geochemistry agree with extensive mixing of the unmodified seawater with high-temperature fluid derived from the gabbroic rock within the ultramafic-dominated ridge segment. The findings reveal that the OVF is a representative example of an off-axis, high-temperature hydrothermal circulation system, possibly driven by the exothermic serpentinization of exposed peridotites. Given the widespread distribution of OCC with detachment faults, furthermore, the OVF may be the most common type of hydrothermal activity in the CIR, although the paucity of data precludes generalizing this result. This study provides important information contributing to our understanding of the ultramafic-hosted hydrothermal vent system with a non-magmatic heat source along mid-ocean ridges.
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology
语种	英语
出版者	FRONTIERS MEDIA SA
WOS记录号	WOS:000761115500001
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/178101]
专题	海洋研究所_海洋地质与环境重点实验室
通讯作者	Lim, Dhongil; Xu, Zhaokai
作者单位	1.CAS Ctr Excellence Quaternary Sci & Global Change, Xian, Peoples R China 2.Chinese Acad Sci, Ctr Ocean Mega, Qingdao, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Geol & Environm, Qingdao, Peoples R China 4.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou, Peoples R China 5.Univ Sci & Technol, KIOST Sch, Dept Ocean Sci, Daejeon, South Korea 6.Korea Inst Ocean Sci & Technol, Busan, South Korea
推荐引用方式 GB/T 7714	Lim, Dhongil,Kim, Jihun,Kim, Wonnyon,et al. Characterization of Geochemistry in Hydrothermal Sediments From the Newly Discovered Onnuri Vent Field in the Middle Region of the Central Indian Ridge[J]. FRONTIERS IN MARINE SCIENCE,2022,9:16.
APA	Lim, Dhongil.,Kim, Jihun.,Kim, Wonnyon.,Kim, Jonguk.,Kim, Dongsung.,...&Xu, Zhaokai.(2022).Characterization of Geochemistry in Hydrothermal Sediments From the Newly Discovered Onnuri Vent Field in the Middle Region of the Central Indian Ridge.FRONTIERS IN MARINE SCIENCE,9,16.
MLA	Lim, Dhongil,et al."Characterization of Geochemistry in Hydrothermal Sediments From the Newly Discovered Onnuri Vent Field in the Middle Region of the Central Indian Ridge".FRONTIERS IN MARINE SCIENCE 9(2022):16.