Reworking of the Juvenile Crust in the Late Mesozoic in North Qinling, Central China
文献类型：期刊论文
| 作者 | Xue, Ying-Yu2,3,4,5; Liu, Haiyang2,4,5; Wang, Zhiyi3; Sun, Weidong1,2,4,5 ; Chen, Fukun3
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| 刊名 | JOURNAL OF EARTH SCIENCE
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| 出版日期 | 2022-03-09 |
| 页码 | 19 |
| ISSN号 | 1674-487X |
| 关键词 | Qinling Orogen Mesozoic granite crustal reworking Nd isotope geochemistry |
| DOI | 10.1007/s12583-021-1521-0 |
| 通讯作者 | Liu, Haiyang(hyliu@qdio.ac.cn) |
| 英文摘要 | The Qinling Orogen resulted from the collision between the North and South China blocks in the Triassic. Mesozoic granitoids, ranging from the Triassic to the Cretaceous, are widely distributed in this orogen, and they provide excellent clues for understanding the crustal evolution and geodynamic evolution of the orogenic belt. The Triassic belt is mostly located in the South Qinling, whereas the Cretaceous belt is located mostly in the North Qinling. The Taibai complex pluton is located at the conjunction of the two belts. Here we present a data set comprising zircon U-Pb dating and elemental and Sr-Nd isotopic geochemistry for Late Mesozoic granite and microgranular enclaves (MME) exposed in the Taibai complex pluton. The granite and MME yield concordant U-Pb zircon ages of 124 to 118 Ma, indicating that they were products of roughly simultaneous magmatism in the Late Mesozoic. The granite rocks are high-K, calc-alkaline, and weakly peraluminous in compositions, and they are characterized by enrichment in large ion lithophile elements (e. g., Rb, Ba), depletion in high field strength elements (e.g., Nb, Ta, Zr, Ti), and variable Sr/Y ratios of 7.64 to 63.6. Low MgO, Cr, and Ni contents imply that the magma(s) were essentially crust-derived. Both the granite and the MME show relative depletion in Sr-Nd isotopic composition (initial Sr-87/Sr-86 of 0.704 4 to 0.706 7, initial epsilon(Nd) values of -3.4 to -2.6), suggesting that the magma(s) originated from juvenile crustal rocks. These Sr-Nd isotopic characteristics are significantly different from those of other Late Mesozoic granitoids exposed elsewhere in the Qinling orogenic belt, which formed from much older and enriched sources and with negligible contributions from mantle or juvenile crust. We propose a reworking event of the juvenile crust during the Late Mesozoic that was triggered by the tectonic extension and subsequent asthenospheric upwelling that occurred in eastern China. |
| 资助项目 | Ministry of Science and Technology of China[2016YFC0600404] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB42020303] ; National Natural Science Foundation of China[41872049] ; National Natural Science Foundation of China[41372072] ; National Natural Science Foundation of China[41903006] ; China Postdoctoral Science Foundation[2019M652497] ; China Postdoctoral Science Foundation[2020T130656] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| 出版者 | CHINA UNIV GEOSCIENCES, WUHAN |
| WOS记录号 | WOS:000766434100001 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/178206]  |
| 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 | Liu, Haiyang |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao 266071, Peoples R China 3.Univ Sci & Technol China, Sch Earth & Space Sci, Hefei 230026, Peoples R China 4.Chinese Acad Sci, Ctr Deep Sea Res, Inst Oceanol, Qingdao 266071, Peoples R China 5.Pilot Natl Lab Marine Sci & Technol Qingdao, Lab Marine Mineral Resources, Qingdao 266237, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xue, Ying-Yu,Liu, Haiyang,Wang, Zhiyi,et al. Reworking of the Juvenile Crust in the Late Mesozoic in North Qinling, Central China[J]. JOURNAL OF EARTH SCIENCE,2022:19. |
| APA | Xue, Ying-Yu,Liu, Haiyang,Wang, Zhiyi,Sun, Weidong,&Chen, Fukun.(2022).Reworking of the Juvenile Crust in the Late Mesozoic in North Qinling, Central China.JOURNAL OF EARTH SCIENCE,19. |
| MLA | Xue, Ying-Yu,et al."Reworking of the Juvenile Crust in the Late Mesozoic in North Qinling, Central China".JOURNAL OF EARTH SCIENCE (2022):19. |
入库方式： OAI收割
来源：海洋研究所
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