Petrogenesis of Early Cretaceous granitoids in Liyang volcanic basin, eastern China: Geodynamic implications for Paleo-Pacific slab rollback
文献类型：期刊论文
| 作者 | Qian, Lin1; Xie, Jiancheng1; Huang, Shan1; Ge, Likai1; Zhang, Xin1; Li, Quanzhong1; Liu, Jianmin1; Yan, Jun1; Sun, Weidong2,3,4
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| 刊名 | TECTONOPHYSICS
 |
| 出版日期 | 2022-09-05 |
| 卷号 | 838页码:18 |
| ISSN号 | 0040-1951 |
| 关键词 | Early Cretaceous Liyang granitoid Petrogenesis Paleo-Pacific slab rollback Eastern China |
| DOI | 10.1016/j.tecto.2022.229521 |
| 通讯作者 | Xie, Jiancheng(xiejiancheng08@hfut.edu.cn) |
| 英文摘要 | Late Mesozoic magmatism in eastern China was extensive and closely related to the subduction of the PaleoPacific plate, but genetic relationship between magmatism and subduction remains unclear. Cretaceous magmatic rocks distributed along the eastern coast of China can provide an opportunity to evaluate the influence of subduction on the evolution of the magmatism. Here, a combined study of whole-rock major-trace elements and Sr-Nd-Pb-Hf isotopes as well as zircon U-Pb ages was carried out for the Cretaceous granitoids in Liyang volcanic basin, eastern China. Zircon U-Pb dating results indicate that the Liyang granitoids were emplaced in the Early Cretaceous (ca. 130???125 Ma). These samples (SiO2 = 70.8???75.3 wt%) are mainly composed of high-K calcalkaline granite and granite porphyry. Their geochemical characteristics are similar to I-type granites, with enrichment in LREEs, Rb, Th and U, and negative Eu (??Eu = 0.04???0.51), Ba, Sr, P and Ti anomalies. All samples show negative whole-rock ??Nd(t) (-9.8 to -5.7) and zircon ??Hf(t) (-15.7 to -3.60) values (corresponding crustal Hf model ages of 1.40???2.17 Ga), and high radiogenic Pb isotopic compositions. The integrated interpretation of geochemical data reveal that rollback of the Paleo-Pacific subducted slab resulted in lithospheric extension and thinning, and the upwelling of hot asthenosphere in eastern China, which induced more intensive underplating of the mantle-derived mafic magma. The ascent of heat and mafic magma, intruded in Meso-Neoproterozoic crust, and triggered partial melting of the Meso-Neoproterozoic crust. The Liyang I-type granitoids were the result of the Meso-Neoproterozoic crustal components mixing with a small number of mantle-derived magmas in the extensional tectonic setting, which was response to slab rollback of the Paleo-Pacific plate. |
| 资助项目 | National Natural Science Foundation of China[42030801] ; National Natural Science Foundation of China[41373045] ; National Key Research and Development Program of China[2016YFC0600404] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:000840814500001 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/179934]  |
| 专题 | 海洋研究所_深海极端环境与生命过程研究中心 |
| 通讯作者 | Xie, Jiancheng |
| 作者单位 | 1.Hefei Univ Technol, Sch Resources & Environm Engn, Hefei 230009, Peoples R China 2.Chinese Acad Sci, Ctr Deep Sea Res, Ctr Ocean Mega Sci, Inst Oceanol, Qingdao 266071, Peoples R China 3.Qingdao Pilot Natl Lab Marine Sci & Technol, Deep Sea Multidisciplinary Res Ctr, Qingdao 266237, Peoples R China 4.Univ Chinese Acad Sci, Sch Marine Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qian, Lin,Xie, Jiancheng,Huang, Shan,et al. Petrogenesis of Early Cretaceous granitoids in Liyang volcanic basin, eastern China: Geodynamic implications for Paleo-Pacific slab rollback[J]. TECTONOPHYSICS,2022,838:18. |
| APA | Qian, Lin.,Xie, Jiancheng.,Huang, Shan.,Ge, Likai.,Zhang, Xin.,...&Sun, Weidong.(2022).Petrogenesis of Early Cretaceous granitoids in Liyang volcanic basin, eastern China: Geodynamic implications for Paleo-Pacific slab rollback.TECTONOPHYSICS,838,18. |
| MLA | Qian, Lin,et al."Petrogenesis of Early Cretaceous granitoids in Liyang volcanic basin, eastern China: Geodynamic implications for Paleo-Pacific slab rollback".TECTONOPHYSICS 838(2022):18. |
入库方式： OAI收割
来源：海洋研究所
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