Geochemical evidence for the generation of intraplate basalts from a carbonated eclogite source: A case study from Cenozoic Siziwangqi basalts
文献类型：期刊论文
| 作者 | Wu, YaDong1; Yang, JinHui1,3; Zhu, YuSheng2 |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2023-09-01 |
| 卷号 | 39期号:9页码:2583-2597 |
| 关键词 | Eastern China Cenozoic basalts Carbonated eclogite Western Pacific slab |
| ISSN号 | 1000-0569 |
| DOI | 10.18654/1000-0569/2023.09.04 |
| 英文摘要 | A detailed study of whole rock and olivine major and trace element and whole rock Sr-Nd-Pb-Hf-Mg isotopic compositions was conducted for the Miocene Siziwangqi basalts in eastern China, to investigate their petrogenesis and the nature of the source. The Siziwangqi basalts exhibit HIMU-like trace element pattern, negative anomalies in Zr, Hf, and Ti, high Zr/Hf ratios (Zr/Hf =49. 3 similar to 54. 8), and delta(26) Mgvalues (delta(26) Mg=- 0. 51 parts per thousand similar to -0. 49 parts per thousand) lower than that of normal mantle range, indicating their derivation from a carbonated mantle source. They have low Sc contents (10. 1 x 10(-6) similar to 10. 5 x 10(-6)) and high Gd/Yb ratios (8. 7 similar to 9. 4). These characteristics, combined with the low Fo, and high Ni0 and Fe/Mn of olivine phenocrysts, indicate that the primary melt of the Siziwangqi basalts was generated by the partial melting of carbonated eclogite. The Siziwangqi basalts have depleted Sr-Nd-Hf isotopic compositions (Sr-87/Sr-86 = 0. 70370 similar to 0. 70449; epsilon(Nd) = + 6. 3 similar to + 6. 4; epsilon(Hf) = + 9. 7 similar to + 10.3) and relative low Pb isotopic compositions ((206)ph/(204)ph = 17. 94 (207)pb/(204)ph =15. 44, (208)ph/(204)ph =37.89) suggesting a young recycled oceanic material in the source that is most likely from the stagnant western Pacific slab. The Siziwangqi basalts are situated to the west of the North-South Gravity Lineament and far from the trench, which implies that the material influence of the stagnant western Pacific slab on the overlying mantle is broader than previously recognized. |
| WOS关键词 | OCEANIC ISLAND BASALTS ; BIG MANTLE WEDGE ; 3 GPA ; ALKALINE BASALTS ; ISOTOPIC COMPOSITION ; VOLCANIC-ROCKS ; EASTERN CHINA ; TRACE-ELEMENT ; PACIFIC SLAB ; RICH MELTS |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001059083200004 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/110815]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 地质与地球物理研究所_中国科学院矿产资源研究重点实验室 |
| 通讯作者 | Wu, YaDong |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, YaDong,Yang, JinHui,Zhu, YuSheng. Geochemical evidence for the generation of intraplate basalts from a carbonated eclogite source: A case study from Cenozoic Siziwangqi basalts[J]. ACTA PETROLOGICA SINICA,2023,39(9):2583-2597. |
| APA | Wu, YaDong,Yang, JinHui,&Zhu, YuSheng.(2023).Geochemical evidence for the generation of intraplate basalts from a carbonated eclogite source: A case study from Cenozoic Siziwangqi basalts.ACTA PETROLOGICA SINICA,39(9),2583-2597. |
| MLA | Wu, YaDong,et al."Geochemical evidence for the generation of intraplate basalts from a carbonated eclogite source: A case study from Cenozoic Siziwangqi basalts".ACTA PETROLOGICA SINICA 39.9(2023):2583-2597. |
入库方式： OAI收割
来源：地质与地球物理研究所
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