Light Mg Isotopic Composition in the Mantle Beyond the Big Mantle Wedge Beneath eastern Asia
文献类型：期刊论文
| 作者 | He, Ye2; Chen, Li-Hui2,3; Shi, Jin-Hua2; Zeng, Gang2; Wang, Xiao-Jun2; Xue, Xiao-Qiu2; Zhong, Yuan2; Erdmann, Saskia4; Xie, Lie-Wen1 |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
 |
| 出版日期 | 2019-08-01 |
| 卷号 | 124期号:8页码:8043-8056 |
| 关键词 | intraplate basalts Mg isotopes Big Mantle Wedge carbonate recycling |
| ISSN号 | 2169-9313 |
| DOI | 10.1029/2018JB016857 |
| 英文摘要 | Low-delta Mg-26 basalts are commonly interpreted to represent melts derived from carbonated mantle sources. The mantle domain feeding low-delta Mg-26 Cenozoic basalts in eastern China overlaps the so-called Big Mantle Wedge (BMW) above the stagnant Pacific slab in the mantle transition zone, which indicates that the BMW is an important carbon reservoir generated by the slab. However, Mg isotopic composition in the nearby mantle beyond the BMW and, thus, the spatial extent of carbonated components in the mantle beneath eastern Asia have not yet been extensively characterized. Therefore, it remains largely unconstrained if additional or alternative carbon reservoirs exist. Here we carried out a geochemical study on Cenozoic Huihe nephelinites, which crop out similar to 500 km west of the present-day BMW. These rocks are characterized by negative K, Zr, Hf, and Ti anomalies, high Zr/Hf, Ca/Al ratios, and low delta Mg-26 values, which suggest that they are derived from a carbonated mantle source. The composition of the nephelinites demonstrates that low delta Mg-26 mantle components exist at significant distances from the present-day BMW, which highlights that in addition to the stagnant Pacific slab, other oceanic slab(s) also contribute(s) carbonate-bearing crustal materials to the mantle sources of Cenozoic volcanism in eastern Asia. |
| WOS关键词 | NORTH CHINA CRATON ; CENOZOIC CONTINENTAL BASALTS ; PARTIAL MELTING EXPERIMENTS ; POTASSIC VOLCANIC-ROCKS ; NE CHINA ; TRACE-ELEMENT ; OCEANIC-CRUST ; GEOCHEMICAL EVIDENCE ; INTRAPLATE BASALTS ; CARBONATED MANTLE |
| 资助项目 | National Natural Science Foundation of China[41688103] ; National Natural Science Foundation of China[41672049] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000491283500027 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/95769]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 通讯作者 | Chen, Li-Hui |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China 2.Nanjing Univ, Sch Earth Sci & Engn, State Key Lab Mineral Deposits Res, Nanjing, Jiangsu, Peoples R China 3.CAS Ctr Excellence Comparat Planetol, Hefei, Anhui, Peoples R China 4.Univ Orleans, CNRS, INSU ISTO BRGM, UMR 7327, Orleans, France |
| 推荐引用方式 GB/T 7714 | He, Ye,Chen, Li-Hui,Shi, Jin-Hua,et al. Light Mg Isotopic Composition in the Mantle Beyond the Big Mantle Wedge Beneath eastern Asia[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2019,124(8):8043-8056. |
| APA | He, Ye.,Chen, Li-Hui.,Shi, Jin-Hua.,Zeng, Gang.,Wang, Xiao-Jun.,...&Xie, Lie-Wen.(2019).Light Mg Isotopic Composition in the Mantle Beyond the Big Mantle Wedge Beneath eastern Asia.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,124(8),8043-8056. |
| MLA | He, Ye,et al."Light Mg Isotopic Composition in the Mantle Beyond the Big Mantle Wedge Beneath eastern Asia".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 124.8(2019):8043-8056. |
入库方式： OAI收割
来源：地质与地球物理研究所
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