Influence of subducted carbonate on the composition of basalts in the Paleo-Asian Ocean domain
文献类型：期刊论文
| 作者 | Wang, Sheng-Peng1,3,4; Li, Jie3 ; Ren, Zhong-Yuan3; Narantsetseg, Tserendash2; Zhang, Qing-Lin1,3,4; Zhong, Qiao-Hui1,3,4; Zhang, Le3; Yuan, Chao3
|
| 刊名 | GONDWANA RESEARCH
 |
| 出版日期 | 2023-12-01 |
| 卷号 | 124页码:290-304 |
| 关键词 | Basalts Zn isotopes Carbonate cycling Subducted Paleo-Asian Ocean |
| ISSN号 | 1342-937X |
| DOI | 10.1016/j.gr.2023.07.011 |
| 英文摘要 | The fate of subducted carbonate of the Paleo-Asian Ocean and its control on the compositional variability of Cenozoic basalts to the west of the Daxing'anling-Taihang Gravity Lineament remain uncertain. Here we report major- and trace-element contents and Zn-Sr-Nd isotopic data for Cenozoic basalts from eastern Mongolia. The studied basalt samples from eastern Mongolia are classified as nephelinite, basanite, alkaline basalt, and tholeiite. They have different Zn-Sr-Nd isotopic compositions (866Zn = 0.38%. & PLUSMN; 0.02%. to 0.50%. & PLUSMN; 0.04%., 87Sr/86Sr = 0.704239-0.705175, eNd = 4.72-5.67) but display trace-element signatures of sedimentary marine carbonate, reflecting mantle heterogeneity and marine carbonate imprint. Compared with the high-Si tholeiites, which were erupted over thinner lithosphere, the nephelinites-b asanites-alkaline basalts erupted over thicker lithosphere have higher 866Zn values, La/Yb, Sm/Yb, and Nb/Y ratios, and Nb contents, indicating that these low-Si basalts were the product of lower-degree melting of carbonated mantle under higher pressure. By combining our data with available data for Cenozoic basalts from central Inner Mongolia, we suggest that the compositions of the nephelinite-basanite- alkaline-basalt-tholeiite suite show systematic spatial variation with respect to the northward subduction zone of the Paleo-Asian Ocean. The tholeiites, which have lower 866Zn values, SiO2 contents, and Sm/Yb ratios, are dominant near the subduction zone, whereas the basanites and alkaline basalts, which have higher 866Zn values, Sm/Yb ratios, and SiO2 contents, are dominant in the region far from the subduction zone. On the basis of a mixing model for Sr-Nd-Zn isotopic compositions, we suggest that the mantle source of the basanites and alkaline basalts incorporated a higher proportion of marine carbonate, whereas the tholeiite mantle source incorporated a higher proportion of siliceous sediments. We deduce that with increasing depth of slab subduction, more sedimentary carbonates and lesser siliceous sediments were released from the subducted slab.& COPY; 2023 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved. |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001053163400001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/74749]  |
| 专题 | 同位素地球化学国家重点实验室 |
| 通讯作者 | Ren, Zhong-Yuan |
| 作者单位 | 1.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China 2.Mongolian Acad Sci, Inst Geol, Dept Magmatism & Metallogeny, Ulaanbaatar 15160, Mongolia 3.Chinese Acad Sci, State Key Lab Isotope Geochem, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China 4.CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Sheng-Peng,Li, Jie,Ren, Zhong-Yuan,et al. Influence of subducted carbonate on the composition of basalts in the Paleo-Asian Ocean domain[J]. GONDWANA RESEARCH,2023,124:290-304. |
| APA | Wang, Sheng-Peng.,Li, Jie.,Ren, Zhong-Yuan.,Narantsetseg, Tserendash.,Zhang, Qing-Lin.,...&Yuan, Chao.(2023).Influence of subducted carbonate on the composition of basalts in the Paleo-Asian Ocean domain.GONDWANA RESEARCH,124,290-304. |
| MLA | Wang, Sheng-Peng,et al."Influence of subducted carbonate on the composition of basalts in the Paleo-Asian Ocean domain".GONDWANA RESEARCH 124(2023):290-304. |
入库方式： OAI收割
来源：广州地球化学研究所
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。