干旱区生态环境知识资源中心(Arid): Statistic and Isotopic Characterization of Deep-Sea Sediments in the Western North Pacific Ocean: Implications for Genesis of the Sediment Extremely Enriched in Rare Earth Elements

Arid

DOI	10.1029/2019GC008214
	Statistic and Isotopic Characterization of Deep-Sea Sediments in the Western North Pacific Ocean: Implications for Genesis of the Sediment Extremely Enriched in Rare Earth Elements
	Yasukawa, Kazutaka 1,2,3; Ohta, Junichiro 1,3; Miyazaki, Takashi 4; Vaglarov, Bogdan Stefanov 4; Chang, Qing 4; Ueki, Kenta 4; Toyama, Chiaki 5; Kimura, Jun-Ichi 4; Tanaka, Erika 2; Nakamura, Kentaro 2; Fujinaga, Koichiro 1,3; Iijima, Koichi 6; Iwamori, Hikaru 4,7,8; Kato, Yasuhiro 1,2,3,6
通讯作者	Kato, Yasuhiro
来源期刊	GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
EISSN	1525-2027
出版年	2019
卷号	20 期号:7 页码:3402-3430
英文摘要	A certain type of deep-sea sediment exhibits very high content of rare earth elements and yttrium (REY) and is therefore expected to serve as a novel resource for these industrially essential metals. In this paper, we statistically analyzed the bulk chemical composition of deep-sea sediments collected from the western North Pacific Ocean. By applying independent component analysis to the multielemental data set, we extracted three independent components (ICs) that can be interpreted as the influence of Mn-oxides (IC1), REY-enriched biogenic calcium phosphate (IC2), and possibly a diagenetic effect involving Cu enrichment (IC3) on bulk sediment geochemistry. Subsequently, we selected representative samples based on the independent component analysis result, and implemented Sr-Nd-Pb isotopic analyses of bulk sediments. The results indicate that the extremely REY-rich mud characterized by IC2 inherits the geochemical signature of deep Pacific seawater, whereas the non-REY-rich mud with less diagenetic alterations, characterized by IC3, implies an influence of terrigenous dust probably from the Taklimakan desert-Chinese loess plateau. IC1 may reflect the variation in sedimentation rates. Characteristic downhole variations of IC1 and IC3 scores imply the presence of hiatus and/or erosion of the sediment column across the REY content peak. The putative cause is an enhanced bottom current, which can physically separate coarse biogenic calcium phosphate grains with very high REY content and thus produce an extremely REY-enriched sediment layer. Plain Language Summary Recent studies discovered that deep-sea sediment in the western North Pacific Ocean is remarkably enriched in rare earth elements that are essential for modern high-tech products. These sediments are thus expected to serve as a new resource for these metals. However, the origin of such high concentrations of rare earth elements in the abyss is unclear. In this paper, we implemented statistical and isotopic analyses of these sediments, and discovered that they are characterized by three components: manganese oxides, biogenic calcium phosphates concentrating rare earth elements from seawater, and a chemical process that moves copper in the sediment. We suggest that a strong bottom current is the cause of a selective deposition of biogenic calcium phosphates that produces mud with an extreme enrichment in rare earth elements.
英文关键词	deep-sea sediment rare earth elements bulk geochemistry independent component analysis isotope analysis western North Pacific Ocean
类型	Article
语种	英语
国家	Japan
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000480282600016
WOS关键词	REY-RICH MUD ; EXCLUSIVE ECONOMIC ZONE ; CHINESE EOLIAN DEPOSITS ; FOSSIL FISH TEETH ; PAST 8 MA ; FERROMANGANESE NODULES ; PELAGIC SEDIMENTS ; SOUTH-PACIFIC ; GEOCHEMICAL CHARACTERISTICS ; INDIAN-OCEAN
WOS类目	Geochemistry & Geophysics
WOS研究方向	Geochemistry & Geophysics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215901
作者单位	1.Univ Tokyo, Sch Engn, Frontier Res Ctr Energy & Resources, Bunkyo Ku, Tokyo, Japan; 2.Univ Tokyo, Sch Engn, Dept Syst Innovat, Bunkyo Ku, Tokyo, Japan; 3.Chiba Inst Technol, Ocean Resources Res Ctr Next Generat, Narashino, Chiba, Japan; 4.Japan Agcy Marine Earth Sci & Technol, Res Inst Marine Geodynam, Yokosuka, Kanagawa, Japan; 5.Natl Inst Adv Ind Sci & Technol, Tecton & Resources Res Grp, Res Inst Geol & Geoinformat, Geol Survey Japan, Tsukuba, Ibaraki, Japan; 6.Japan Agcy Marine Earth Sci & Technol, Submarine Resources Res Ctr, Yokosuka, Kanagawa, Japan; 7.Univ Tokyo, Earthquake Res Inst, Bunkyo Ku, Tokyo, Japan; 8.Tokyo Inst Technol, Sch Sci, Dept Earth & Planetary Sci, Meguro Ku, Tokyo, Japan
推荐引用方式 GB/T 7714	Yasukawa, Kazutaka,Ohta, Junichiro,Miyazaki, Takashi,et al. Statistic and Isotopic Characterization of Deep-Sea Sediments in the Western North Pacific Ocean: Implications for Genesis of the Sediment Extremely Enriched in Rare Earth Elements[J],2019,20(7):3402-3430.
APA	Yasukawa, Kazutaka.,Ohta, Junichiro.,Miyazaki, Takashi.,Vaglarov, Bogdan Stefanov.,Chang, Qing.,...&Kato, Yasuhiro.(2019).Statistic and Isotopic Characterization of Deep-Sea Sediments in the Western North Pacific Ocean: Implications for Genesis of the Sediment Extremely Enriched in Rare Earth Elements.GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,20(7),3402-3430.
MLA	Yasukawa, Kazutaka,et al."Statistic and Isotopic Characterization of Deep-Sea Sediments in the Western North Pacific Ocean: Implications for Genesis of the Sediment Extremely Enriched in Rare Earth Elements".GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 20.7(2019):3402-3430.