Genetic links between granitic and related dioritic rocks in Liaodong Peninsula, China: Sr-Nd-Hf-O isotopic evidence
文献类型：期刊论文
| 作者 | Chen, Shi1; Sun, Jin-Feng1; Zhang, Ji-Heng1; Yang, Jin-Hui2; Yang, Yue-Heng2 |
| 刊名 | LITHOS
 |
| 出版日期 | 2020-03-01 |
| 卷号 | 356页码:13 |
| 关键词 | Granite Dioritic rocks Magma mixing Crystal-melt segregation In situ isotopic analysis North China Craton |
| ISSN号 | 0024-4937 |
| DOI | 10.1016/j.lithos.2020.105368 |
| 英文摘要 | Syenogranite and related dioritic rocks (dioritic microgranular enclaves and quartz diorite) from the Early Cretaceous Shihuzhen-Jiudaogou pluton, NE China, were studied to investigate the formation and evolution of the granitic magma driven by the mantle-derived magma. All selected rocks were formed contemporaneously, with zircon U-Pb ages of 125-121 Ma. Field and petrographic observations show that magma mixing happened between mafic and felsic magmas represented by dioritic enclaves and syenogranite. The dioritic enclaves with quenching textures have low SiO2 and high MgO contents, variable zircon epsilon(H)(f)(t) compositions (-8.7 to +2.4), coupled with low initial Sr-87/Sr-86 ratios (0.70647-0.70772) and variable epsilon(Nd)(t) values (-8.8 to -3.9) for apatite, suggesting they were derived from an enriched mantle source with contamination of crustal materials. The syenogranites have relatively high Rb-87/Sr-86 ratios (2.92-22.0), variable zircon epsilon(Hf)(t) compositions (from -11.1 to -3.6), coupled with low initial Sr-87/Sr-86 ratios (0.70727 to 0.70791) and variable epsilon(Nd)(t) values (from -9.9 to -7.3) for apatite, requiring a juvenile crust origin with participation of mantle-derived magma. They were characterized by high SiO2 (> 74.0 wt.%) and low MgO, P2O5 contents, with conspicuous negative Ba, Sr, and Eu anomalies, implying a late fractionation phase. The quartz diorites have relatively high initial Sr-87/Sr-86 ratios (0.70781-0.70928) for apatite, with negative zircon epsilon(Hf)(t) values (-11.6 to -7.8) and apatite epsilon(Nd)(t) values (-10.5 to -8.9), which are identical to those of the felsic parental magma of syenogranite. They show complementary geochemical compositions with the syenogranite, including low SiO2 (< 60.0 wt.%), high MgO (Mg-# up to 44.2) and Sr (> 744 ppm) contents, with obvious positive Ba and Sr anomalies and weakly positive Eu anomalies. Coupled with petrological observations (e.g., cumulate texture), we argue the crystal-melting segregation model account for the genetic link between the quartz diorite and syenogranite, representing residual crystal accumulations and segregated interstitial melt from a crystal-rich magma chamber. The partial melting of juvenile lower crust and the subsequent crystallization differentiation of intermediate-acid magma developed a crystal-rich magma chamber. The mantle-derived magma then drove the rejuvenation of pre-exist magma chamber, promoted the crystal-melt segregation process and mixed with the felsic magma, and then formed quartz diorite and syenogranite in the Shihuzhen-Jiudaogou pluton. Mantle-derived magma played an important role in the formation of the granitic rocks, providing heat for partial melting, materials, and the driving force for their compositional evolution. (C) 2020 Elsevier B.V. All rights reserved. |
| WOS关键词 | U-PB AGE ; MAFIC MAGMATIC ENCLAVES ; TRACE-ELEMENT ; ICP-MS ; GEOCHEMICAL EVIDENCE ; CONTINENTAL-CRUST ; EASTERN HEBEI ; SE CHINA ; LU-HF ; ZIRCON |
| 资助项目 | Ministry of Science and Technology of the People's Republic of China[2016YFC0600109] ; National Natural Science Foundation of China[41202046] |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| 语种 | 英语 |
| WOS记录号 | WOS:000520941500011 |
| 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/132A11/95531]  |
| 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, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Shi,Sun, Jin-Feng,Zhang, Ji-Heng,et al. Genetic links between granitic and related dioritic rocks in Liaodong Peninsula, China: Sr-Nd-Hf-O isotopic evidence[J]. LITHOS,2020,356:13. |
| APA | Chen, Shi,Sun, Jin-Feng,Zhang, Ji-Heng,Yang, Jin-Hui,&Yang, Yue-Heng.(2020).Genetic links between granitic and related dioritic rocks in Liaodong Peninsula, China: Sr-Nd-Hf-O isotopic evidence.LITHOS,356,13. |
| MLA | Chen, Shi,et al."Genetic links between granitic and related dioritic rocks in Liaodong Peninsula, China: Sr-Nd-Hf-O isotopic evidence".LITHOS 356(2020):13. |
入库方式： OAI收割
来源：地质与地球物理研究所
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