Early Palaeozoic syn-collisional granitic magmatism in the North Altun and its implication for accretionary orogenic processes
文献类型：期刊论文
| 作者 | Wu Yu1,5; Chen ZhengLe1,2; Chen BaiLin1; Wang Yong1; Sun Yue2; Meng LingTong3; He JiangTao4; Wang Bin1 |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2021-05-01 |
| 卷号 | 37期号:5页码:1321-1346 |
| 关键词 | Syn-collisional granites Accretionary orogenesis Ocean-Continent transition Early Palaeozoic North Altun |
| ISSN号 | 1000-0569 |
| DOI | 10.18654/1000-0569/2021.05.02 |
| 英文摘要 | This paper present a set of new petrography, major and trace element geochemistry, zircon U-Pb geochronology and in situ Hf isotopic compositions for Kaladawan porphyritc granite, Goukouquan porphyritc monzogranite, Zhuoerbulake granodiorite and Muzisayi muscovite granite in North Altun. The Kaladawan porphyritc granite are characterized by relatively high contents of silicon and sodium, but low contents of iron, magnesium and calcium, with moderate alumina saturation index (A/CNK = 1. 03 - 1. 04), belonging to slightly peraluminous I -S transition type granite. Goukouquan porphyritc monzogranite and Zhuoerbulake granodiorite exhibit relatively high sodium contents and metaluminous to slightly peraluminous calc-alkaline I -type granitoids features. Muzisayi muscovite granite show relatively high Si02, ALK (Na20 + K2 0, enrichment Rb, Th and LREE, depletion Ba, Sr, Ti, Eu, and yields alumina saturation index values of > 1. 1, showing S -type granite features. Zircon U-Pb dating suggest that four granitic plutons were emplaced during Early Silurian (439 432Ma). Integrating the regional tectonic evolution and discrimination diagrams, we propose the closure time of North Altun Ocean occurred during ca. 445 - 440Ma. Goukouquan porphyritc monzogranite and Zhuoerbulake granodiorite exhibit relatively high zircon e f (t) values (+ 4. 72 + 7. 55 and + 6. 33 - + 9. 96, respectively), suggest that they were generated by partial melting of the pre-existing juvenile crustal rocks. Geochemical characteristics show that the Kaladawan porphyritc granite was derived from partial melting of metagreywackes rocks, whereas the Muzisayi muscovite granite was derived from low degree partial melting of metapelitic rocks. However, the relatively positive EHf (t) values (+ 0. 18 - + 5. 88 and - 6. 47 - +4. 52, respectively) strongly suggest that the involvement of some juvenile crust components in different proportions. Above these features are similar to the Early Palaeozoic syn-collision granitoids from the North Qilian, which further support that two orogenic belts have undergone similar geological and tectonic processes involving continental rifting, ocean floor spreading, seafloor subduction, accrationary orogenesis in the time period fromthe Neoproterozoic to the Paleozoic. |
| WOS关键词 | MANTLE ; CRUST ; AGE ; NB ; TA |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000664449300002 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/101983]  |
| 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 | Chen ZhengLe |
| 作者单位 | 1.Chinese Acad Geol Sci, Inst Geornechan, Beijing 100081, Peoples R China 2.East China Inst Technol, Nanchang 330013, Jiangxi, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 4.China Geol Survey, Tianjin Ctr, Tianjin 300170, Peoples R China 5.CNNC, Beijing Res Inst Uranium Geol, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu Yu,Chen ZhengLe,Chen BaiLin,et al. Early Palaeozoic syn-collisional granitic magmatism in the North Altun and its implication for accretionary orogenic processes[J]. ACTA PETROLOGICA SINICA,2021,37(5):1321-1346. |
| APA | Wu Yu.,Chen ZhengLe.,Chen BaiLin.,Wang Yong.,Sun Yue.,...&Wang Bin.(2021).Early Palaeozoic syn-collisional granitic magmatism in the North Altun and its implication for accretionary orogenic processes.ACTA PETROLOGICA SINICA,37(5),1321-1346. |
| MLA | Wu Yu,et al."Early Palaeozoic syn-collisional granitic magmatism in the North Altun and its implication for accretionary orogenic processes".ACTA PETROLOGICA SINICA 37.5(2021):1321-1346. |
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。