Rift melting of juvenile arc-derived crust: Geochemical evidence from Neoproterozoic volcanic and granitic rocks in the Jiangnan Orogen, South China
文献类型：期刊论文
| 作者 | Zheng, Yong-Fei1; Wu, Rong-Xin1,4; Wu, Yuan-Bao1; Zhang, Shao-Bing1; Yuan, Honglin2; Wu, Fu-Yuan3 |
| 刊名 | PRECAMBRIAN RESEARCH
 |
| 出版日期 | 2008-06-10 |
| 卷号 | 163期号:3-4页码:351-383 |
| 关键词 | Neoproterozoic magmatism continental accretion arc-continent collision orogenic collapse rift anatexis hydrothermal alteration |
| ISSN号 | 0301-9268 |
| DOI | 10.1016/j.precamres.2008.01.004 |
| 文献子类 | Review |
| 英文摘要 | A combined study of zircon U-Pb and Lu-Hf isotopes, mineral O isotopes, whole-rock elements and Sr-Nd isotopes was carried out for Neoproterozoic volcanics and granites from the eastern part of the Jiangnan Orogen in South China. The results are used to test controversial models of petrogenesis (plume-rift, slab-arc and plate-rift) for similar ages of magmatic rocks in South China. Zircon U-Pb dating yields two groups of ages at similar to 780 and similar to 825 Ma, respectively, corresponding to syn-rift and pre-rift magmatic events in response to supercontinental rifting. Both volcanic and granitic rocks show trace element features similar to those of arc-derived igneous rocks, but with more significant enrichment in large ion lithospheric elements relative to oceanic arc basalts. They have positive epsilon(Hf)(t) values of 3.6-6.3 for zircons, with Hf model ages of 1.12-1.21 Ga. This indicates reworking of late Mesoproterozoic juvenile crust for the origin of the Neoproterozoic magmatic rocks. Thus, oceanic arc magmatism would occur in the late Mesoproterozoic, with remarkable production of juvenile crust at the southeastern margin of the Yangtze Block. Because of the tectonic collapse of arc-continent collision orogen in the pre-rift stage, S-type magmatic rocks were generated by burial and anatexis of juvenile arc-derived crust to form the pre-rift episode of granodiorites and volcanics. In the syn-rift stage, the volcanics formed by reworking of are-derived sedimentary rocks whereas the granite was generated by melting of the pre-rift igneous rocks. Emplacement of evolved felsic magmas along the rift tectonic zone would cause subsolidus high-T meteoric-hydrothermal alteration, resulting in varying delta O-18 values for minerals from the volcanic and granitic rocks. Therefore, the plate-rift model is advanced to account for petrogenesis of all Neoproterozoic magmatic rocks in South China, with lithospheric extsension as the driving force of supercontinental rifting. Partial melting due to arc-continent collision, orogenic collapse and supercontinental rifting is also proposed as a mechanism for the chemical differentiation of continental crust towards the felsic composition. (C) 2008 Elsevier B.V. All rights reserved. |
| WOS关键词 | ZIRCON U-PB ; WESTERN YANGTZE BLOCK ; OXYGEN-ISOTOPE FRACTIONATION ; PRESSURE METAMORPHIC ROCKS ; PLASMA-MASS SPECTROMETRY ; MANTLE PLUME BENEATH ; TECTONIC EVOLUTION ; BREAK-UP ; CONTINENTAL-CRUST ; YANBIAN TERRANE |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000256930500008 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/68672]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Zheng, Yong-Fei |
| 作者单位 | 1.Univ Sci & Technol China, Sch Earth & Space Sci, CAS Key Lab Crust Mantle Mat & Environm, Hefei 230026, Peoples R China 2.NW Univ Xian, Dept Geol, State Key Lab Continental Dynam, Xian 710069, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithosphere Evolut, Beijing 100029, Peoples R China 4.Anhui Univ Sci & Technol, Dept Resource & Environm Engn, Huainan 232001, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zheng, Yong-Fei,Wu, Rong-Xin,Wu, Yuan-Bao,et al. Rift melting of juvenile arc-derived crust: Geochemical evidence from Neoproterozoic volcanic and granitic rocks in the Jiangnan Orogen, South China[J]. PRECAMBRIAN RESEARCH,2008,163(3-4):351-383. |
| APA | Zheng, Yong-Fei,Wu, Rong-Xin,Wu, Yuan-Bao,Zhang, Shao-Bing,Yuan, Honglin,&Wu, Fu-Yuan.(2008).Rift melting of juvenile arc-derived crust: Geochemical evidence from Neoproterozoic volcanic and granitic rocks in the Jiangnan Orogen, South China.PRECAMBRIAN RESEARCH,163(3-4),351-383. |
| MLA | Zheng, Yong-Fei,et al."Rift melting of juvenile arc-derived crust: Geochemical evidence from Neoproterozoic volcanic and granitic rocks in the Jiangnan Orogen, South China".PRECAMBRIAN RESEARCH 163.3-4(2008):351-383. |
入库方式： OAI收割
来源：地质与地球物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。