Barium isotope evidence for pervasive sediment recycling in the upper mantle
文献类型：期刊论文
| 作者 | 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 |
| 刊名 | SCIENCE ADVANCES
 |
| 出版日期 | 2018-07-01 |
| 卷号 | 4期号:7页码:8 |
| ISSN号 | 2375-2548 |
| DOI | 10.1126/sciadv.aas8675 |
| 通讯作者 | Nielsen, Sune G.(snielsen@whoi.edu) |
| 英文摘要 | The 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. |
| 资助项目 | NSF[EAR-1119373] ; NSF[EAR-1427310] |
| WOS研究方向 | Science & Technology - Other Topics |
| 语种 | 英语 |
| WOS记录号 | WOS:000443176100036 |
| 出版者 | AMER ASSOC ADVANCEMENT SCIENCE |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/160015]  |
| 专题 | 中国科学院海洋研究所 |
| 通讯作者 | Nielsen, Sune G. |
| 作者单位 | 1.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 |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：海洋研究所
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