Multi-stage Jurassic magmatism in the Liaodong Peninsula: Constraints on crustal evolution beneath the eastern North China Craton
文献类型：期刊论文
| 作者 | Sun, Jin-Feng1; Zhang, Ji-Heng1; Yang, Jin-Hui1,2; Zhu, Yu-Sheng2; Chen, Jing-Yuan3; Ling-Hu, Miao-Miao1 |
| 刊名 | LITHOS
 |
| 出版日期 | 2021-11-15 |
| 卷号 | 402页码:15 |
| 关键词 | Jurassic granite Zircon Hf-O isotopes Crustal evolution Liaodong Peninsula |
| ISSN号 | 0024-4937 |
| DOI | 10.1016/j.lithos.2020.105897 |
| 英文摘要 | Whole-rock geochemical and in situ zircon U-Pb and Hf-O isotope compositions have been measured for the Jurassic granitoids in the Liaodong Peninsula, in order to investigate their genesis and reveal the Jurassic crustal evolution of the eastern North China Craton. Our new data, combined with field and petrological observations, indicate multi-stage Jurassic magmatism, now represented by Early to Middle Jurassic biotite granites and monzogranites, and Late Jurassic two-mica monzogranites. The Early to Middle Jurassic granitoids have relatively low SiO2 contents (64.4-69.6 wt%) and K2O/Na2O ratios (0.4-1.0), adakitic characteristics with enriched LREE and depleted HREE contents, high Sr/Y ratios (52-189), positive Eu and Ba anomalies, and negative Nb and Ta anomalies. Together with their highly negative zircon epsilon(Hf)(t) (-26.6 to -16.1) and mantle-like delta O-18 (4.6 parts per thousand to 6.3 parts per thousand) values, partial melting of a basaltic lower crust, which formed at ca. 2.5 Ga, can be proposed for the magma source of the Early to Middle Jurassic granitoids. These source rocks have not experienced significant water-rock alteration after formation. In contrary, the Late Jurassic two-mica granitoids exhibit relatively differentiated geochemical characteristics, with high SiO2 contents (>72 wt%) and K2O/Na2O ratios and variable Eu anomalies. Their parental magma was also enriched in LREEs and depleted in HREEs, with high Sr/Y (49.8-134) and (La/Yb)(N) (22.6-38.0) ratios. The magmatic zircons have extremely negative epsilon(Hf)(t) (-37.5 to -19.6) and relatively high delta O-18 (6.9 parts per thousand to 9.6 parts per thousand) values, indicating the involvement of an ancient crustal component with high delta O-18 values, such as metasedimentary rocks. We propose, therefore, that the Late Jurassic two-mica monzogranites originated from partial melting of reworked ancient crustal materials at the depth of lower crust, and with the magma subsequently evolving as a result of plagioclase-dominated fractional crystallization. During Early to Middle Jurassic, westward subduction of the Paleo-Pacific plate, resulted in the partial melting of the mafic lower crust and the burial of ancient crustal materials in to deep crust, while crustal stretching in Late Jurassic might account for the decompression melting of the ancient crustal source. Thus, multi-stage Jurassic magmatism in the Liaodong Peninsula recorded a complex crustal evolution history, which closely related to the westward subduction of the Paleo-Pacific plate. (C) 2020 Elsevier B.V. All rights reserved. |
| WOS关键词 | ZIRCON U-PB ; MESOZOIC BASIN DEVELOPMENT ; HF-O ; TECTONIC IMPLICATIONS ; ACCRETIONARY COMPLEX ; CONTINENTAL-CRUST ; ISOTOPIC EVIDENCE ; WORKING REFERENCE ; MAFIC ENCLAVES ; PETROGENESIS |
| 资助项目 | Ministry of Science and Technology of the People's Republic of China[2016YFC0600109] ; National Natural Science Foundation of China[42073034] |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| 语种 | 英语 |
| WOS记录号 | WOS:000713001200002 |
| 出版者 | ELSEVIER |
| 资助机构 | Ministry of Science and Technology of the People's Republic of China ; Ministry of Science and Technology of the People's Republic of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Ministry of Science and Technology of the People's Republic of China ; Ministry of Science and Technology of the People's Republic of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Ministry of Science and Technology of the People's Republic of China ; Ministry of Science and Technology of the People's Republic of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Ministry of Science and Technology of the People's Republic of China ; Ministry of Science and Technology of the People's Republic of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/103775]  |
| 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 | Sun, Jin-Feng |
| 作者单位 | 1.Univ Chinese Acad Sci, Key Lab Computat Geodynam, 19A Yuquanlu, Beijing 100049, Peoples R China 2.Chinese Acad Sci, State Key Lab Lithospher Evolut, Inst Geol & Geophys, POB 9825, Beijing 100029, Peoples R China 3.Changan Univ, Sch Earth Sci & Resources, Xian 710054, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sun, Jin-Feng,Zhang, Ji-Heng,Yang, Jin-Hui,et al. Multi-stage Jurassic magmatism in the Liaodong Peninsula: Constraints on crustal evolution beneath the eastern North China Craton[J]. LITHOS,2021,402:15. |
| APA | Sun, Jin-Feng,Zhang, Ji-Heng,Yang, Jin-Hui,Zhu, Yu-Sheng,Chen, Jing-Yuan,&Ling-Hu, Miao-Miao.(2021).Multi-stage Jurassic magmatism in the Liaodong Peninsula: Constraints on crustal evolution beneath the eastern North China Craton.LITHOS,402,15. |
| MLA | Sun, Jin-Feng,et al."Multi-stage Jurassic magmatism in the Liaodong Peninsula: Constraints on crustal evolution beneath the eastern North China Craton".LITHOS 402(2021):15. |
入库方式： OAI收割
来源：地质与地球物理研究所
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