| Crust recycling induced compositional-temporal-spatial variations of Cenozoic basalts in the Trans-North China Orogen | |
| Xu, Rong1; Liu, Yongsheng1; Wang, Xiaohong1,2; Zong, Keqing1; Hu, Zhaochu1; Chen, Haihong1; Zhou, Lian1 | |
| 2017-03-01 | |
| 发表期刊 | LITHOS
 |
| 卷号 | 274页码:383-396 |
| 文章类型 | Article |
| 摘要 | It has been advocated that the stagnant Pacific slab within the mantle transition zone played a critical role in the genesis of the Cenozoic basalts in the eastern part of the North China Craton (NCC); however, it is not clear whether this recycled oceanic crust contributed to the chemical makeup of the Cenozoic basalts in the Trans North China Orogen (TNCO, the central zone of the NCC). Here, we show that Cenozoic basalts from the TNCO are featured by low CaO contents, high TiO2 and FeOT contents and high Fe/Mn and Zn/Fe ratios, indicating a mantle source of pyroxenite. Temporally, these basalts evolved from alkali basalts of Late Eocene-Oligocene age to coexisting alkali and tholeiitic basalts of Late Miocene-Quaternary age. Spatially, their isotopic and chemical compositions vary symmetrically from the center to both the north and the south sides along the TNCO, i.e., SiO2 contents and Sr-87/Sr-86 ratios increase, FeOT contents and Nd-143/Nd-144, Sm/Yb and Ce/Pb ratios decrease. The estimated average melting pressure of the TNCO tholeiitic basalts (similar to 3 GPa) agrees well with the present lithosphere thickness beneath the north region of the TNCO (similar to 90-120 km). The temporal and spatial chemical variations of Cenozoic basalts in the TNCO suggest that the recycled oceanic crust in the mantle of the TNCO is mainly related to the southward subduction of the Paleo-Asian oceanic plate and the northward subduction of the Tethyan ocean plate. The westward subduction of Pacific slab may not have contributed much than previously thought. (C) 2017 Elsevier B.V. All rights reserved. |
| 关键词 | Cenozoic Basalt North China Craton Pyroxenite Recycled Oceanic Crust Trans-north China Orogen |
| DOI | 10.1016/j.lithos.2016.12.024 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000397375400023 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 版本 | 出版稿 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/136766 |
| 专题 | 海洋地质与环境重点实验室 |
| 作者单位 | 1.China Univ Geosci, Sch Earth Sci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Rong,Liu, Yongsheng,Wang, Xiaohong,et al. Crust recycling induced compositional-temporal-spatial variations of Cenozoic basalts in the Trans-North China Orogen[J]. LITHOS,2017,274:383-396. |
| APA | Xu, Rong.,Liu, Yongsheng.,Wang, Xiaohong.,Zong, Keqing.,Hu, Zhaochu.,...&Zhou, Lian.(2017).Crust recycling induced compositional-temporal-spatial variations of Cenozoic basalts in the Trans-North China Orogen.LITHOS,274,383-396. |
| MLA | Xu, Rong,et al."Crust recycling induced compositional-temporal-spatial variations of Cenozoic basalts in the Trans-North China Orogen".LITHOS 274(2017):383-396. |
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| 文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
| Crust recycling indu（2263KB） | 期刊论文 | 出版稿 | 限制开放 | CC BY-NC-SA | 浏览 | |
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