Delineation of the early Neoarchean (2.75 to 2.70 Ga) crustal growth and reworking processes in the southeast base of Taihang Mountain, North China Craton
文献类型：期刊论文
| 作者 | Zhou, Yanyan4,5; Sun, Qianying1,2; Zheng, Yali3,4,5; Zhao, Taiping1; Zhai, Mingguo3,4,5 |
| 刊名 | LITHOS
 |
| 出版日期 | 2021 |
| 卷号 | 380页码:19 |
| 关键词 | TTG Early Neoarchean U-Pb-Hf isotopes Crustal accretion North China Craton (NCC) |
| ISSN号 | 0024-4937 |
| DOI | 10.1016/j.lithos.2020.105829 |
| 英文摘要 | Numerous studies suggest that various secular geologic and geochemical transitions occurred between similar to 3.2 Ga and 2.5 Ga. During this age-window, the similar to 2.70 Ga tectono-thermal event of the Neoarchean is by far themost influential, and is unusual in terms of coeval mafic-felsic magmatic rocks which were interpreted to reflect widespread crustal accretion. Here we report the early Neoarchean TTG and potassic granite association preserved in the Yunmengshan area, Taihang Mountain, North China Craton (NCC). TTG and potassic granites emplaced at 2712 +/- 65 to 2644 +/- 25 Ma, followed by similar to 2.57 to 2.50 Ga metamorphism and partial anatexis. TTG has geochemical features corresponding to high-Al medium-pressure (MP) TTG. Their high CaO, low to moderate Al2O3/(FeOT + MgO), and positive epsilon(Hf) (t) values (+3.8 to +7.2) with T-DM2 of 2.96 to 2.75 Ga, indicate that they formed by partial melting of juvenile low-K mafic rocks, representative of crustal accretion. Besides, TTG can be subdivided into two groups based on Eu anomalies. Thosewith Eu/Eu*< 1.0 underwent advanced amphibole and plagioclase fractionation. The possible reason for theirweakly negative Eu anomalies is that plagioclase has negated the effects of amphibole fractionation which is theoretically accompanied by plagioclase removal. Those with positive Eu anomalies accord with "slab-melt" identification criterion (Sr > 300 ppm plus elevated Sr/Y> 40, (La/Yb)(N)> 12 and Eu/Eu*> 1.0). The high Eu/Eu*, Sr/Y and lowYb probably represent the contribution of amphibole fractionation and plagioclase accumulation during the magma evolution. The evidence favors an arc-related setting for the TTG. The early Neoarchean potassic granites are monzogranite to syenogranite, and formed shortly after TTG. They belong to high-K calc-alkaline to shoshonitic I-type granite, and display depleted and concave-upward REE patterns between middle and heavy REEs and higher Zr/Sm ratios (69.6 on average) than TTG (45.4). The calculated eHf (t) values are mainly positive (+1.4 to +7.0) with T-DM2 from 3.03 Ga to 2.72 Ga, together with low Al2O3 /(FeOT + MgO), low to moderate CaO and high K2O/Na2O ratios, indicating a high-K mafic crustal source with metapelite involvement. Meanwhile, we reviewed geochemical data of the early Neoarchean TTGs published in the NCC and other cratons abroad. The results show that samples from Trans-North China Orogen in NCC have lower Y contents, higher Sr/Y and (La/Yb)(N) ratios, and more depleted HREE than those from Eastern Block, which could be interpreted to reflect an increase in the depth of melting. Alternatively, according to previous studies and comparison globally, elevated Sr/Y values could also reflect increased consumption of plagioclase in melting reactions due to higher temperatures, or magma fractionation. Therefore, it mostly lacks a clear distinction between the "arc" and "non-arc" settings based on geochemistry. However, many researchers put forward evidence that subduction was well attested in the late Archean (3.0 to 2.5 Ga), but it might be unstable. (C) 2020 Elsevier B.V. All rights reserved. |
| WOS关键词 | ZIRCON U-PB ; TRONDHJEMITE-GRANODIORITE TTG ; EARLY CONTINENTAL-CRUST ; LU-HF ; EXPERIMENTAL CONSTRAINTS ; ISOTOPIC COMPOSITIONS ; TECTONIC EVOLUTION ; SUPERIOR PROVINCE ; ZANHUANG COMPLEX ; ELEMENT ANALYSES |
| 资助项目 | National Natural Science Foundation of China[41972202] ; National Natural Science Foundation of China[41572176] ; National Natural Science Foundation of China[41573041] ; National Natural Science Foundation of China[41890831] ; National Natural Science Foundation of China[41890830] ; National Natural Science Foundation of China[41530208] ; Independent Research Project of the State Key Laboratory of Lithospheric Evolution (2019-2022) |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| 语种 | 英语 |
| WOS记录号 | WOS:000612245000003 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Independent Research Project of the State Key Laboratory of Lithospheric Evolution (2019-2022) ; Independent Research Project of the State Key Laboratory of Lithospheric Evolution (2019-2022) ; Independent Research Project of the State Key Laboratory of Lithospheric Evolution (2019-2022) ; Independent Research Project of the State Key Laboratory of Lithospheric Evolution (2019-2022) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Independent Research Project of the State Key Laboratory of Lithospheric Evolution (2019-2022) ; Independent Research Project of the State Key Laboratory of Lithospheric Evolution (2019-2022) ; Independent Research Project of the State Key Laboratory of Lithospheric Evolution (2019-2022) ; Independent Research Project of the State Key Laboratory of Lithospheric Evolution (2019-2022) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Independent Research Project of the State Key Laboratory of Lithospheric Evolution (2019-2022) ; Independent Research Project of the State Key Laboratory of Lithospheric Evolution (2019-2022) ; Independent Research Project of the State Key Laboratory of Lithospheric Evolution (2019-2022) ; Independent Research Project of the State Key Laboratory of Lithospheric Evolution (2019-2022) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Independent Research Project of the State Key Laboratory of Lithospheric Evolution (2019-2022) ; Independent Research Project of the State Key Laboratory of Lithospheric Evolution (2019-2022) ; Independent Research Project of the State Key Laboratory of Lithospheric Evolution (2019-2022) ; Independent Research Project of the State Key Laboratory of Lithospheric Evolution (2019-2022) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/100107]  |
| 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 | Zhou, Yanyan |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Mineral & Metallogeny, Guangzhou 510640, Peoples R China 2.Guangdong Acad Sci, Natl Reg Joint Engn Res Ctr Soil Pollut Control &, Guangdong Inst Ecoenvironm Sci & Technol, Guangdong Key Lab Integrated Agroenvironm Pollut, Guangzhou 510650, Peoples R China 3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 5.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhou, Yanyan,Sun, Qianying,Zheng, Yali,et al. Delineation of the early Neoarchean (2.75 to 2.70 Ga) crustal growth and reworking processes in the southeast base of Taihang Mountain, North China Craton[J]. LITHOS,2021,380:19. |
| APA | Zhou, Yanyan,Sun, Qianying,Zheng, Yali,Zhao, Taiping,&Zhai, Mingguo.(2021).Delineation of the early Neoarchean (2.75 to 2.70 Ga) crustal growth and reworking processes in the southeast base of Taihang Mountain, North China Craton.LITHOS,380,19. |
| MLA | Zhou, Yanyan,et al."Delineation of the early Neoarchean (2.75 to 2.70 Ga) crustal growth and reworking processes in the southeast base of Taihang Mountain, North China Craton".LITHOS 380(2021):19. |
入库方式： OAI收割
来源：地质与地球物理研究所
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