Light calcium isotope anomaly observed in continental basaltic lavas: A mixed signal of recycled carbonate and fractionation during melting
文献类型：期刊论文
| 作者 | Wang, Yang1; Meng, Xunan1; He, Yongsheng1; Huang, Jian4; Lu, Wen-Ning1; Shi, Qingshang1; Ke, Shan1; Tang, Yan-Jie3; Huang, Shichun2; Li, Shuguang1 |
| 刊名 | LITHOS
 |
| 出版日期 | 2023-11-01 |
| 卷号 | 456页码:14 |
| ISSN号 | 0024-4937 |
| 关键词 | Calcium isotope fractionation Magmatic processes Carbonate recycling Cenozoic basaltic lavas |
| DOI | 10.1016/j.lithos.2023.107307 |
| 英文摘要 | We present high-precision Ca isotopic data for 21 Cenozoic basaltic lavas from eastern China to evaluate the potential of Ca isotopes as a tool to trace the recycling of surface carbonates. These samples were derived from a variety of peridotite to pyroxenite mantle sources hybridized by different slab-derived agents. The & delta;44/42Ca of eastern China Cenozoic basaltic lavas ranges from 0.24 & PLUSMN; 0.03%o (2SE, if not specified) to 0.39 & PLUSMN; 0.03%o, with an average of 0.31 & PLUSMN; 0.09%o (2SD, N = 21), systematically lower than mid-ocean ridge basalts (MORB, 0.39 & PLUSMN; 0.07%o, 2SD, N = 30). No convincing correlation has been observed with & delta;26Mg and & delta;66Zn, indicating that metasomatism by recycled carbonates may not always yield Ca isotopically distinct mantle sources. & delta;44/42Ca shows correlations with parameters reflecting degree of partial melting (e.g., K2O, Nb, LREE, U, Th, Rb, and Sr) and residual garnet signature (i.e., (Dy/Yb)N). Nevertheless, modeling results suggest that Ca isotope fraction-ation during mantle and/or slab melting with the presence of garnet can partially account for the observed variable & delta; 44/42Ca. Recycled carbonates with low & delta;44/42Ca were likely involved in the origins of the lightest lavas. Particularly, the nephelinitic lightest lavas also have the lowest & delta;26Mg, Ti/Ti* and Hf/Hf* among all the studied samples, reflecting a role of carbonatitic metasomatism in their sources. This study illustrates that a strongly light Ca isotope anomaly (e.g., & delta;44/42Ca -0.24%o) observed in basaltic lavas is likely associated with the recycling of carbonates into the mantle. |
| WOS关键词 | INTRAPLATE ALKALINE BASALTS ; CENOZOIC BASALTS ; MANTLE BENEATH ; ORTHO-PYROXENE ; 750 MA ; 3 GPA ; CA ; CHINA ; MAGNESIUM ; GENESIS |
| 资助项目 | National Natural Science Foundation of China[41730214] ; National Natural Science Foundation of China[42103010] ; National Natural Science Foundation of China[42288201] ; National Key Ramp;D Program of China[2019YFA0708400] ; Fundamental Research Funds for the Central Universities[3-7-5-2019-07] ; State Key Laboratory of Geological Processes and Mineral Resources |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:001063605900001 |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Ramp;D Program of China ; National Key Ramp;D Program of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; State Key Laboratory of Geological Processes and Mineral Resources ; State Key Laboratory of Geological Processes and Mineral Resources ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Ramp;D Program of China ; National Key Ramp;D Program of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; State Key Laboratory of Geological Processes and Mineral Resources ; State Key Laboratory of Geological Processes and Mineral Resources ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Ramp;D Program of China ; National Key Ramp;D Program of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; State Key Laboratory of Geological Processes and Mineral Resources ; State Key Laboratory of Geological Processes and Mineral Resources ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Ramp;D Program of China ; National Key Ramp;D Program of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; State Key Laboratory of Geological Processes and Mineral Resources ; State Key Laboratory of Geological Processes and Mineral Resources |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/110828]  |
| 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 | He, Yongsheng |
| 作者单位 | 1.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China 2.Univ Tennessee, Dept Earth & Planetary Sci, Knoxville, TN 37996 USA 3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 4.Univ Sci & Technol China, CAS Key Lab Crust Mantle Mat & Environm, Hefei 230026, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Yang,Meng, Xunan,He, Yongsheng,et al. Light calcium isotope anomaly observed in continental basaltic lavas: A mixed signal of recycled carbonate and fractionation during melting[J]. LITHOS,2023,456:14. |
| APA | Wang, Yang.,Meng, Xunan.,He, Yongsheng.,Huang, Jian.,Lu, Wen-Ning.,...&Li, Shuguang.(2023).Light calcium isotope anomaly observed in continental basaltic lavas: A mixed signal of recycled carbonate and fractionation during melting.LITHOS,456,14. |
| MLA | Wang, Yang,et al."Light calcium isotope anomaly observed in continental basaltic lavas: A mixed signal of recycled carbonate and fractionation during melting".LITHOS 456(2023):14. |
入库方式： OAI收割
来源：地质与地球物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。