Identification of carbonated eclogitic source for Cenozoic intraplate alkaline basalts from western Central Asia and its geodynamic implication
文献类型：期刊论文
| 作者 | Niu, Tianyi2; Su, Yuping2; Zheng, Jianping2; Zhou, Liang2; Wang, Jian2,3; Chen, Xi1; Bian, Xiao2; Zhang, Xiahui2 |
| 刊名 | CHEMICAL GEOLOGY
 |
| 出版日期 | 2024-09-20 |
| 卷号 | 663页码:16 |
| 关键词 | Intraplate alkaline basalts Carbonated eclogite Recycled components India-Eurasia collision Western Central Asia |
| ISSN号 | 0009-2541 |
| DOI | 10.1016/j.chemgeo.2024.122259 |
| 英文摘要 | Carbonated eclogite has been identified as a significant component in the formation of intraplate alkaline basalts, typically attributed to stagnated subducted oceanic slabs, such as the Pacific plate beneath eastern China. However, it is unclear whether this component exists in other tectonic settings. Here, we present new zircon U-Pb geochronology, mineral chemistry, and geochemical analyses of Cenozoic Tuoyun basanites and alkaline basalts from western Central Asia, where stagnated subducted oceanic slabs are absent, to elucidate the source properties and associated geodynamic processes. Olivine compositions (e.g., moderate Ni concentrations, low Mn/Fe and Ni/(Mg/Fe) ratios) and whole-rock chemistry (e.g., high Fe/Mn, Ca/Al, and Zr/Hf ratios, TiO2 contents, and weak anomalies of Zr-Hf-Ti) suggest a carbonated eclogite in the mantle source of the Tuoyun basanites. Trace elements (positive Nb-Ta anomalies and absence of positive Eu anomaly) and depleted to slightly enriched Sr-Nd-Hf isotopic compositions indicate that the basanites originated from mantle sources composed of variable proportions of altered oceanic crust (AOC) and carbonates. Synthesizing regional geochemical, geophysical studies and tectonic history, we propose that the continuous India-Eurasia collision triggered mantle upwelling, leading to the formation of a widespread carbonated eclogitic mantle source beneath western Central Asia. Our findings suggest that carbonate-rich mantle sources may also be present in areas without stagnated subduction slabs. |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001266389700001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/78300]  |
| 专题 | 同位素地球化学国家重点实验室 |
| 通讯作者 | Su, Yuping |
| 作者单位 | 1.Southwest Petr Univ, Sch Geosci & Technol, Chengdu 610550, Peoples R China 2.China Univ Geosci, Sch Earth Sci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China |
| 推荐引用方式 GB/T 7714 | Niu, Tianyi,Su, Yuping,Zheng, Jianping,et al. Identification of carbonated eclogitic source for Cenozoic intraplate alkaline basalts from western Central Asia and its geodynamic implication[J]. CHEMICAL GEOLOGY,2024,663:16. |
| APA | Niu, Tianyi.,Su, Yuping.,Zheng, Jianping.,Zhou, Liang.,Wang, Jian.,...&Zhang, Xiahui.(2024).Identification of carbonated eclogitic source for Cenozoic intraplate alkaline basalts from western Central Asia and its geodynamic implication.CHEMICAL GEOLOGY,663,16. |
| MLA | Niu, Tianyi,et al."Identification of carbonated eclogitic source for Cenozoic intraplate alkaline basalts from western Central Asia and its geodynamic implication".CHEMICAL GEOLOGY 663(2024):16. |
入库方式： OAI收割
来源：广州地球化学研究所
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