Distribution, speciation and mobility of metals in sediments of the Tianxiu hydrothermal field, Carlsberg Ridge, Northwest Indian Ocean

doi:10.1016/j.jmarsys.2022.103826

IOCAS-IR

	Distribution, speciation and mobility of metals in sediments of the Tianxiu hydrothermal field, Carlsberg Ridge, Northwest Indian Ocean
	Qiu, Zhongyan 1,2; Fan, Weijia 1,2; Han, Xiqiu 1,2; Chen, Xuegang 3; Yin, Xuebo 4
	2023
发表期刊	JOURNAL OF MARINE SYSTEMS
ISSN	0924-7963
卷号	237 页码:12
通讯作者	Qiu, Zhongyan(qiuzy@sio.org.cn)
摘要	Tianxiu is the only ultramafic-hosted hydrothermal field that has been discovered on the slow-spreading Carlsberg Ridge (CR), northwest Indian Ocean. Sequential extraction has been performed on the surface sedi-ments from the near-vent and far-field of Tianxiu to characterize the compositions of metalliferous sediments, the speciation of selected metals and the potential risks of metal mobility. The near-vent sediments of Tianxiu are mainly derived from hydrothermal inputs and are enriched in Fe, Zn, P, Pb, Mo and especially Cu, Mg, Co and Ni with significantly higher contents compared to metalliferous sediments formed in basalt-hosted hydrothermal systems. Most of the ore-forming elements (Fe, Cu, Zn, Mn, Co and Ni) and rare-earth elements (REEs) exist in the residual fraction and Fe-Mn oxide fraction, followed by the carbonate fraction and organic fraction. The chondrite-normalized REE pattern in each phase is characterized by relative enrichment in light (L)REEs and positive Eu anomalies, consistent with the REE patterns of hydrothermal fluids. The far-field sediments of Tianxiu are mainly derived from background pelagic sedimentation while the sediments at some sites are influenced by a small amount of hydrothermal plume fallout. The investigated elements mainly exist in the Fe-Mn oxide fraction, residual fraction and carbonate fraction. In particular, ore-forming elements Cu, Pb, Mn, Co and Ni are mostly enriched in the Fe-Mn oxide fraction, which is attributed to their adsorption by hydrothermal partic-ulates in the plumes. The potential mobility of each metal is evaluated in terms of its total content in the unstable phases, which reveals that most of the heavy metals (e.g., Cu, Zn, Mn and Pb) in the metalliferous sediments have high potential mobility (> 50%).
关键词	Speciation Sequential extraction Metal mobility Metalliferous sediments Carlsberg Ridge
DOI	10.1016/j.jmarsys.2022.103826
收录类别	SCI
语种	英语
资助项目	National Key Research and Development Program of China[2021YFF0501302] ; National Natural Science Foundation of China[41976075] ; Fundamental Research Funds for National Non-profit Institute Grant[JG2103] ; China Ocean Mineral Resources R&D Association project[DY135-S2-1-03]
WOS研究方向	Geology ; Marine & Freshwater Biology ; Oceanography
WOS类目	Geosciences, Multidisciplinary ; Marine & Freshwater Biology ; Oceanography
WOS记录号	WOS:000882136900003
出版者	ELSEVIER
引用统计	被引频次：5[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/180339
专题	中国科学院海洋研究所
通讯作者	Qiu, Zhongyan
作者单位	1.Minist Nat Resources, Key Lab Submarine Geosci, Hangzhou 310012, Peoples R China 2.Minist Nat Resources, Inst Oceanog 2, Hangzhou 310012, Peoples R China 3.Zhejiang Univ, Ocean Coll, Zhoushan 316021, Peoples R China 4.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Qiu, Zhongyan,Fan, Weijia,Han, Xiqiu,et al. Distribution, speciation and mobility of metals in sediments of the Tianxiu hydrothermal field, Carlsberg Ridge, Northwest Indian Ocean[J]. JOURNAL OF MARINE SYSTEMS,2023,237:12.
APA	Qiu, Zhongyan,Fan, Weijia,Han, Xiqiu,Chen, Xuegang,&Yin, Xuebo.(2023).Distribution, speciation and mobility of metals in sediments of the Tianxiu hydrothermal field, Carlsberg Ridge, Northwest Indian Ocean.JOURNAL OF MARINE SYSTEMS,237,12.
MLA	Qiu, Zhongyan,et al."Distribution, speciation and mobility of metals in sediments of the Tianxiu hydrothermal field, Carlsberg Ridge, Northwest Indian Ocean".JOURNAL OF MARINE SYSTEMS 237(2023):12.

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