Geochronology, Geochemistry and Tectonic Significance of Buziwannan Late Triassic I-Type Granites in the West Kunlun Orogen Belt, Northwest China
文献类型：期刊论文
| 作者 | Chen, Peiwen1,2; Zeng, Qingdong2,3 |
| 刊名 | PETROLOGY
 |
| 出版日期 | 2021-09-01 |
| 卷号 | 29期号:5页码:575-596 |
| ISSN号 | 0869-5911 |
| 关键词 | West Kunlun Orogen Buziwannan Au polymetallic deposit tectonic setting Triassic |
| DOI | 10.1134/S0869591121050052 |
| 英文摘要 | The formation of the West Kunlun Orogenic Belt, which is located at the northwest margin of the Greater Tibetan Plateau, is associated with the evolution of Proto- and Paleo-Tethys Oceans from the early-Paleozoic to the Triassic and characterized by intensive magmatism and extensive metallogenesis. This paper presents a detailed study of the LA-ICP-MS zircon U-Pb chronology, zircon Hf isotope geochemistry, and major and trace element composition of the Buziwannan granodiorite and monzogranite in the South Kunlun Terrane. The LA-ICP-MS zircon U-Pb dating shows that the two granites were emplaced in the late Triassic (231.8-226.8 Ma), and are high-K calc-alkaline I-type granodiorite and monzogranite in composition. Zircons from the Buziwannan granites have epsilon Hf(T) values ranging from -3.83 to 2.96, with corresponding two-stage Hf model ages (T(DM2)) of 1075-1505 Ma, suggesting the importance of juvenile material in the magma source. The Buziwannan granites show enrichments in LREEs, Rb, Th, U and Hf, and depletions in Sr, Nb, Ta and Eu. The contradiction between continental signature and mantle-like isotopes indicates the granites were generated by the partial melting of residual subducting slab with input of sediments. The ratios of Rb/Sr and (La/Yb)(N) increase from the granodiorite to monzogranite, while the Sr, Dy and Er values decrease. These data are attributed to fractional crystallization processes. Fractionation of plagioclase, hornblende and biotite produced the variations in major elements and Rb, Sr and Ba, and the distribution of REEs are mainly controlled by fractionation of hornblende and subordinately of zircon. Together with the regional geology, the data infer that the Buziwannan granites and corresponding mineralization formed in a transitional setting from syn-collision to post-collision during the Late Triassic. |
| WOS关键词 | K CALC-ALKALINE ; POTASSIC MICROGRANULAR ENCLAVES ; CONTINENTAL-CRUST GROWTH ; S-TYPE GRANITES ; U-PB AGES ; TRACE-ELEMENTS ; HIGH-PRESSURE ; HF ISOTOPES ; PARTITION-COEFFICIENTS ; ACCRETIONARY TECTONICS |
| 资助项目 | Second Tibetan Plateau Scientific Expedition and Research Program[2019QZKK2702] ; National Natural Science Foundation of China[41390443] ; National Natural Science Foundation of China[91514301] |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| 语种 | 英语 |
| 出版者 | PLEIADES PUBLISHING INC |
| WOS记录号 | WOS:000695843000006 |
| 资助机构 | Second Tibetan Plateau Scientific Expedition and Research Program ; Second Tibetan Plateau Scientific Expedition and Research Program ; Second Tibetan Plateau Scientific Expedition and Research Program ; Second Tibetan Plateau Scientific Expedition and Research Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research Program ; Second Tibetan Plateau Scientific Expedition and Research Program ; Second Tibetan Plateau Scientific Expedition and Research Program ; Second Tibetan Plateau Scientific Expedition and Research Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research Program ; Second Tibetan Plateau Scientific Expedition and Research Program ; Second Tibetan Plateau Scientific Expedition and Research Program ; Second Tibetan Plateau Scientific Expedition and Research Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research Program ; Second Tibetan Plateau Scientific Expedition and Research Program ; Second Tibetan Plateau Scientific Expedition and Research Program ; Second Tibetan Plateau Scientific Expedition and Research Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/102681]  |
| 专题 | 地质与地球物理研究所_中国科学院矿产资源研究重点实验室 |
| 通讯作者 | Chen, Peiwen |
| 作者单位 | 1.Guizhou Univ, Coll Resource & Environm Engn, Guiyang 550012, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Peiwen,Zeng, Qingdong. Geochronology, Geochemistry and Tectonic Significance of Buziwannan Late Triassic I-Type Granites in the West Kunlun Orogen Belt, Northwest China[J]. PETROLOGY,2021,29(5):575-596. |
| APA | Chen, Peiwen,&Zeng, Qingdong.(2021).Geochronology, Geochemistry and Tectonic Significance of Buziwannan Late Triassic I-Type Granites in the West Kunlun Orogen Belt, Northwest China.PETROLOGY,29(5),575-596. |
| MLA | Chen, Peiwen,et al."Geochronology, Geochemistry and Tectonic Significance of Buziwannan Late Triassic I-Type Granites in the West Kunlun Orogen Belt, Northwest China".PETROLOGY 29.5(2021):575-596. |
入库方式： OAI收割
来源：地质与地球物理研究所
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