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Barium isotope evidence for pervasive sediment recycling in the upper mantle
Nielsen, Sune G.1,2; Horner, Tristan J.1,3; Pryer, Helena V.1,3; Blusztajn, Jerzy1,2; Shu, Yunchao1,2,4,5; Kurz, Mark D.3; Le Roux, Veronique2
2018-07-01
Source PublicationSCIENCE ADVANCES
ISSN2375-2548
Volume4Issue:7Pages:8
Corresponding AuthorNielsen, Sune G.(snielsen@whoi.edu)
AbstractThe upper mantle, as sampled by mid-ocean ridge basalts (MORBs), exhibits significant chemical variability unrelated to mechanisms of melt extraction at ridges. We show that barium isotope variations in global MORBs vary systematically with radiogenic isotopes and trace element ratios, which reflects mixing between depleted and enriched MORB melts. In addition, modern sediments and enriched MORBs share similar Ba isotope signatures. Using modeling, we show that addition of-0.1% by weight of sediment components into the depleted mantle in subduction zones must impart a sedimentary Ba signature to the overlying mantle and induce low-degree melting that produces the enriched MORB reservoir. Subsequently, these enriched domains convect toward mid-ocean ridges and produce radiogenic isotope variation typical of enriched MORBs. This mechanism can explain the chemical and isotopic features of enriched MORBs and provide strong evidence for pervasive sediment recycling in the upper mantle.
DOI10.1126/sciadv.aas8675
Indexed BySCI
Language英语
Funding ProjectNSF[EAR-1119373] ; NSF[EAR-1427310]
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000443176100036
PublisherAMER ASSOC ADVANCEMENT SCIENCE
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/160016
Collection中国科学院海洋研究所
Corresponding AuthorNielsen, Sune G.
Affiliation1.Woods Hole Oceanog Inst, NIRVANA Nontradit Isotope Res Adv Novel Applicat, Woods Hole, MA 02543 USA
2.Woods Hole Oceanog Inst, Dept Geol & Geophys, Woods Hole, MA 02543 USA
3.Woods Hole Oceanog Inst, Dept Marine Chem & Geochem, Woods Hole, MA 02543 USA
4.Chinese Acad Sci, Inst Oceanol, Qingdao, Peoples R China
5.Univ Chinese Acad Sci, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Nielsen, Sune G.,Horner, Tristan J.,Pryer, Helena V.,et al. Barium isotope evidence for pervasive sediment recycling in the upper mantle[J]. SCIENCE ADVANCES,2018,4(7):8.
APA Nielsen, Sune G..,Horner, Tristan J..,Pryer, Helena V..,Blusztajn, Jerzy.,Shu, Yunchao.,...&Le Roux, Veronique.(2018).Barium isotope evidence for pervasive sediment recycling in the upper mantle.SCIENCE ADVANCES,4(7),8.
MLA Nielsen, Sune G.,et al."Barium isotope evidence for pervasive sediment recycling in the upper mantle".SCIENCE ADVANCES 4.7(2018):8.
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