Genesis and geological significances of Neoproterozoic granitoids in the North Qinling terrain, SW Henan, China
文献类型：期刊论文
| 作者 | Liu BingXiang1,2; Nie Hu1; Qi Yue1; Yang Li3; Zhu XiYan3; Chen FuKun1 |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2013-07-01 |
| 卷号 | 29期号:7页码:2437-2455 |
| ISSN号 | 1000-0569 |
| 关键词 | North Qinling Neoproterozoic Supercontinent Granite Zircon age |
| 文献子类 | Article |
| 英文摘要 | Neoproterozoic granitoids exposed in the North Qinling terrain belong to an important part of the Qinling orogenic belt and have recorded Precambrian crustal formation and evolution of the basement of this orogenic belt. In this study, we report zircon U-Pb ages and oxygen isotopic data and whole-rock geochemical and Sr-Nd isotopic composition for the Fangzhuang and Dehe granitoid plutons, emplaced into the Qinling Group in the North Qinling terrain, and discuss petrogenesis and geological significances for crustal evolution of the basement. Analytical results show that zircons of the Fangzhuang granite pluton formed in 933. 4 +/- 9. 2Ma, zircons have delta O-18 values of 8. 3 parts per thousand similar to 11. 9 parts per thousand and whole-rock yields initial epsilon(Nd), value of -6. 0, Nd model age of 2. 09Ga (t(DM2)) and initial Sr-87/Sr-86 value of O. 72455, while zircons of the Dehe granite pluton crystallized in 948. 1 +/- 8. 9Ma and whole-rock has initial e value of -5. 0, corresponding to Nd model age of 2. 02Ga (t(DM2)) and variable initial Sr-87/Sr-86 value. Integrating with isotopic ages of fifteen Neoproterozoic granitoid plutons exposed in the North Qinling terrain previously reported, the Neoproterozoic magmatism in this terrain can be subdivided into two major stages resulted from 980 similar to 870Ma compressional and similar to 844Ma extensional tectonic settings, mainly including similar to 940Ma syn-collisional, similar to 880Ma post-collisional and similar to 844Ma intraplate extensional granitoids. Geochemical and isotopic features of these granitoids indicate that they probably originated from partial melting mainly of crustal material similar to the Qinling Group, but contribution of mantle or juvenile material to the magmas became significant after similar to 900Ma in the post-collisional processes. Neoproterozoic magmatic activities in the North Qinling terrain broadly simultaneous with the formation of supercontinent Rodinia and hence, they record response of the basement in this terrain. The crustal evolution in North Qinling terrain prior to the Neoproterozoic was likely different from those in the North China and South China blocks. |
| WOS关键词 | U-PB AGES ; LA-ICP-MS ; BASIC DYKE SWARMS ; OROGENIC BELT ; TECTONIC EVOLUTION ; GEOCHEMICAL CHARACTERISTICS ; SONGSHUGOU OPHIOLITE ; VOLCANIC-ROCKS ; TRACE-ELEMENTS ; EASTERN ASIA |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| 出版者 | SCIENCE PRESS |
| WOS记录号 | WOS:000322926000013 |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/87420]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Liu BingXiang |
| 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, State Key Lab Continental Dynam, Xian 710069, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu BingXiang,Nie Hu,Qi Yue,et al. Genesis and geological significances of Neoproterozoic granitoids in the North Qinling terrain, SW Henan, China[J]. ACTA PETROLOGICA SINICA,2013,29(7):2437-2455. |
| APA | Liu BingXiang,Nie Hu,Qi Yue,Yang Li,Zhu XiYan,&Chen FuKun.(2013).Genesis and geological significances of Neoproterozoic granitoids in the North Qinling terrain, SW Henan, China.ACTA PETROLOGICA SINICA,29(7),2437-2455. |
| MLA | Liu BingXiang,et al."Genesis and geological significances of Neoproterozoic granitoids in the North Qinling terrain, SW Henan, China".ACTA PETROLOGICA SINICA 29.7(2013):2437-2455. |
入库方式： OAI收割
来源：地质与地球物理研究所
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