Geochronology, geochemistry and isotopic composition of the 2.18-2.16 Ga granitoid rocks from the northwestern Zhongtiao Mountain region: Implications for the middle Paleoproterozoic tectonic evolution of the southern North China Craton
文献类型：期刊论文
| 作者 | Zhang, Ruiying1; Zhai, Mingguo1,2; Zhao, Yan1 |
| 刊名 | LITHOS
 |
| 出版日期 | 2023-03-01 |
| 卷号 | 440页码:16 |
| 关键词 | North China Craton Zhongtiao Mountains Middle Paleoproterozoic Granitoid rocks Intracontinental rifting |
| ISSN号 | 0024-4937 |
| DOI | 10.1016/j.lithos.2023.107020 |
| 英文摘要 | The Paleoproterozoic magmatic rocks in the Zhongtiao Mountain region can provide important clues for un-derstanding the tectonic evolution of the southern North China Craton (NCC). The present study verifies that the granitoid rocks from the Guzhen-Fanjiazhuang-Houma areas in the northwestern Zhongtiao Mountain region formed at ca. 2.18-2.16 Ga. The monzogranites in the Guzhen-Fanjiazhuang areas have high SiO2 (72.05-75.06 wt%) and K2O (5.47-6.77 wt%) contents, but low Fe2O3T (1.29-2.00 wt%) and MgO (0.45-0.83 wt%) contents. Most samples belong to the high-K calc-alkaline to shoshonite series and show weakly peraluminous features (A/ CNK = 1.09-1.12). The Guzhen granodiorites have relatively low SiO2 (63.38-67.73 wt%) and K2O (2.68-4.97 wt%) contents and A/CNK ratios (0.89-1.05). All the monzogranites and granodiorites yield low Fe2O3T/MgO (2.31-4.44) and 10000*Ga/Al (1.85-2.29) ratios and low zircon saturation temperatures (T-Zr) of 743-838 degrees C, with I-type granite affinity. They show shared trends in the Harker diagrams and no discernible difference in zircon Hf and whole-rock Nd isotopes, implying that they were generated by crystal fractionation of the same parental magma. Moreover, their Cr, Co and Ni contents, as well as Ce/Pb and Nd/Sm ratios, are similar to those of continental crust. Together with their whole-rock Nd isotopic data (epsilon(Nd)(t) = -0.8 similar to +2.3, T-DM2 = 2413-2667 Ma), as well as zircon Hf isotopic compositions (epsilon(Hf)(t) = -3.03 similar to +4.54, T-DM2 = 2492-2928 Ma), we interpret their derivation by partial melting of Neoarchean potassium-rich basaltic lower crust. The syenogranites in the Houma area display A-type granite affinity and are characterized by high SiO2 (73.59-75.71 wt%), Na2O + K2O (8.57-9.43 wt%), Zr (388-432 ppm) and Zr + Nb + Ce + Y (520-642 ppm) contents and high Fe2O3T/MgO ratios (12.08-13.57), as well as high T-Zr values (873-875 degrees C). Most zircons have positive epsilon(Hf)(t) values of -0.07 similar to +3.79, with T-DM2 ages of 2511-2748 Ma, and plot on the evolutionary line of Neoarchean TTG rocks in the Zhongtiao Mountains. They are derived by partial melting of a mixed source of dominant Neoarchean (2.72-2.55 Ga) TTG rocks and minor juvenile mantle-derived materials. Combined with coeval mafic magmatic rocks in the Zhongtiao Mountains, we propose that these ca. 2.18-2.16 Ga granitoid rocks were likely formed in a Paleoproterozoic intracontinental rift setting. A comparison of the spatial-temporal distribution and geochemical features of ca. 2.2-2.0 Ga mafic-felsic rocks in the southern NCC reveals that the rifting events during ca. 2.2-2.1 Ga extended at least from the southern margin areas (including XQL, XES and LS) to the Zhongtiao Mountain region, which may be related to the global rifting events of the late Archean supercontinent. |
| WOS关键词 | A-TYPE GRANITES ; U-PB GEOCHRONOLOGY ; SUSHUI COMPLEX ; CALC-ALKALINE ; FRACTIONATED GRANITES ; ZIRCON GEOCHRONOLOGY ; QUARTZ-MONZONITE ; TAIHUA COMPLEX ; HF ISOTOPES ; 2 EPISODES |
| 资助项目 | National Natural Science Foundation of China[41890831] ; Natural Science Basic Research Plan in Shaanxi Province of China[2022JQ-263] ; Postdoctoral Research Foundation of China[2022M712571] |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| 语种 | 英语 |
| WOS记录号 | WOS:000920667900001 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; Natural Science Basic Research Plan in Shaanxi Province of China ; Natural Science Basic Research Plan in Shaanxi Province of China ; Postdoctoral Research Foundation of China ; Postdoctoral Research Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Natural Science Basic Research Plan in Shaanxi Province of China ; Natural Science Basic Research Plan in Shaanxi Province of China ; Postdoctoral Research Foundation of China ; Postdoctoral Research Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Natural Science Basic Research Plan in Shaanxi Province of China ; Natural Science Basic Research Plan in Shaanxi Province of China ; Postdoctoral Research Foundation of China ; Postdoctoral Research Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Natural Science Basic Research Plan in Shaanxi Province of China ; Natural Science Basic Research Plan in Shaanxi Province of China ; Postdoctoral Research Foundation of China ; Postdoctoral Research Foundation of China |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/106834]  |
| 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 | Zhang, Ruiying |
| 作者单位 | 1.Northwest Univ, Dept Geol, State Key Lab Continental Dynam, Xian 710069, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Ruiying,Zhai, Mingguo,Zhao, Yan. Geochronology, geochemistry and isotopic composition of the 2.18-2.16 Ga granitoid rocks from the northwestern Zhongtiao Mountain region: Implications for the middle Paleoproterozoic tectonic evolution of the southern North China Craton[J]. LITHOS,2023,440:16. |
| APA | Zhang, Ruiying,Zhai, Mingguo,&Zhao, Yan.(2023).Geochronology, geochemistry and isotopic composition of the 2.18-2.16 Ga granitoid rocks from the northwestern Zhongtiao Mountain region: Implications for the middle Paleoproterozoic tectonic evolution of the southern North China Craton.LITHOS,440,16. |
| MLA | Zhang, Ruiying,et al."Geochronology, geochemistry and isotopic composition of the 2.18-2.16 Ga granitoid rocks from the northwestern Zhongtiao Mountain region: Implications for the middle Paleoproterozoic tectonic evolution of the southern North China Craton".LITHOS 440(2023):16. |
入库方式： OAI收割
来源：地质与地球物理研究所
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