干旱区生态环境知识资源中心(Arid): Zr/Hf ratio and REE behaviour: A coupled indication of lithogenic input in marginal basins and deep-sea brines

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DOI	10.1016/j.dsr2.2019.05.004
	Zr/Hf ratio and REE behaviour: A coupled indication of lithogenic input in marginal basins and deep-sea brines
	Censi, P.1; Raso, M.1; Saiano, F.2; Zuddas, P.3; Oliveri, E.4
通讯作者	Censi, P.
来源期刊	DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY
ISSN	0967-0645
EISSN	1879-0100
出版年	2019
卷号	164 页码:216-223
英文摘要	The distribution of dissolved Zr, Hf and Rare Earth Elements (yttrium and lanthanides, hereafter referred to as REE) in the Eastern Mediterranean seawater column was measured in the Kryos basin to evaluate the lithogenic contribution from both Nile River and Sahara and Arabian desert dust. We found dissolved Zr/Hf ratios below the signature of crustal rocks and chondrites; a phenomenon likely driven by the dissolution of the Mn-rich coating of atmospheric dust particles delivered from the desert. In deeper waters, Zr/Hf ratios are clustered close to the signature of crustal rocks and chondrites according to the different Zr and Hf dissolved speciation. The Zr/Hf ratio observed in the deeper 3300?m seawater column corresponds to the value found in the Atlantic Ocean. The REE distribution displays a negative Ce anomaly and a positive La anomaly throughout the shallow waters above a 75?m depth. Zr, Hf, and REE concentrations measured in the anoxic deep-sea brines from Tyro, Medee, and Thetis basins indicate that the dissolution of evaporite within Messinian levels is responsible for the high salt content of these brines and influence Zr/Hf fractionation in the aqueous phase. Hafnium shows stronger affinity relative to Zr for surfaces of salts and Mn-Fe oxyhydroxides. Zr/Hf values and the observed shale-normalised REE features suggest that Zr, Hf and REE are leached from Mn and Fe-rich coatings of desert particles in shallow water layers. This process can be responsible for the observed distribution of studied elements in the studied Eastern Mediterranean oxic seawater. In deep-sea brines, Zr, Hf and REE are released from Messinian evaporites.
类型	Article
语种	英语
国家	Italy ; France
收录类别	SCI-E
WOS记录号	WOS:000479017800018
WOS关键词	RARE-EARTH-ELEMENTS ; COASTAL WATER-SYSTEMS ; NEODYMIUM ISOTOPES ; ATLANTIC-OCEAN ; FERROMANGANESE CRUSTS ; DISSOLVED ZIRCONIUM ; MEDITERRANEAN-SEA ; ANOXIC BRINES ; ZR-HF ; NB-TA
WOS类目	Oceanography
WOS研究方向	Oceanography
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215025
作者单位	1.Univ Palermo, DISTEM Dept, Via Archirafi 22, I-90123 Palermo, Italy; 2.Univ Palermo, SAF Dept, Viale Sci 4, I-90128 Palermo, Italy; 3.Sorbonne Univ, 4 Pl Jussieu, F-75005 Paris, France; 4.IAMC CNR, UOS Capo Granitola, Via Mare 3, I-91021 Campobello Di Mazara, Italy
推荐引用方式 GB/T 7714	Censi, P.,Raso, M.,Saiano, F.,et al. Zr/Hf ratio and REE behaviour: A coupled indication of lithogenic input in marginal basins and deep-sea brines[J],2019,164:216-223.
APA	Censi, P.,Raso, M.,Saiano, F.,Zuddas, P.,&Oliveri, E..(2019).Zr/Hf ratio and REE behaviour: A coupled indication of lithogenic input in marginal basins and deep-sea brines.DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY,164,216-223.
MLA	Censi, P.,et al."Zr/Hf ratio and REE behaviour: A coupled indication of lithogenic input in marginal basins and deep-sea brines".DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY 164(2019):216-223.