Mineralogy of columbite-group minerals from the rare-element pegmatite dykes in the East-Qinling orogen, central China: Implications for formation times and ore genesis
文献类型：期刊论文
| 作者 | Zhou, Qifeng1,2; Qin, Kezhang2,3,4; Tang, Dongmei2,3 |
| 刊名 | JOURNAL OF ASIAN EARTH SCIENCES
 |
| 出版日期 | 2021-09-15 |
| 卷号 | 218页码:21 |
| 关键词 | Columbite-group mineral chemistry Wodginite Geochronology Lithium-beryllium mineralization Rare-element pegmatite Paleozoic North Qinling orogen |
| ISSN号 | 1367-9120 |
| DOI | 10.1016/j.jseaes.2021.104879 |
| 英文摘要 | The East-Qinling pegmatite district located in the North Qinling terrane is the largest one in the Qinling orogen, Central China. It is famous for its rare-element (REL) reserves, but its genesis is unraveled. We present in-situ major- and trace-element chemistry and U-Pb dating analysis of columbite-group minerals (CGM) and wodginite from representative Li-, Be-mineralized and barren pegmatite dykes. The mineralogical researches reveal that Li-mineralized pegmatite formed from a highly-evolved fluxes-rich magma, experiencing a magmatic stage at undercooling condition and a post-magmatic stage involving disturbance by alkali liquid or hydrothermal fluid. The lithium mineralization is accomplished by fractional crystallization after emplacement, alkali-fluid replacement or overprint of two Li-rich magmas. CGM Fe-Mn fractionation and REE distribution patterns with tetrad effect are considered as indicators to identify generations of CGM and trace the evolution of pegmatite formation. The CGM and zircon U-Pb ages suggest that the REL pegmatites formed in 422-410 Ma (Period I) and 399-384 Ma (Period II) and an early pegmatite magma activity occurred in 447-443 Ma. The late Ordovicianearly Silurian and Period II pegmatite magmas stem from partial melting of North Qinling unit in collision and post-orogenic extensional settings, respectively, whereas Period I pegmatites formed in a weakening convergence setting by anatexis of fertile metasedimentary rocks or extremely fractional crystallization of granitic magma. The early-Paleozoic evolution of the North Qinling terrane contributes to the formation of large-scale EastQinling REL pegmatites on the aspects of magma production and subsequent emplacement by crustal thickening, crustal reworking and dynamic extension during crust uplift. |
| WOS关键词 | ASSIMILATION-FRACTIONAL CRYSTALLIZATION ; ALPHA-DECAY DAMAGE ; U-PB GEOCHRONOLOGY ; NO. 3 PEGMATITE ; NB-TA OXIDES ; GRANITIC PEGMATITES ; TECTONIC EVOLUTION ; CHEMICAL EVOLUTION ; TRACE-ELEMENTS ; TANTALUM-(NIOBIUM-TIN) MINERALIZATION |
| 资助项目 | State Key Laboratory of Lithospheric Evolution Open Subject[201304] ; National Natural Science Foundation of China[41602095] ; Key Research Program of the Institute of Geology and Geophysics, Chinese Academy of Sciences[IGGCAS-201902] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000688629900002 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 资助机构 | State Key Laboratory of Lithospheric Evolution Open Subject ; State Key Laboratory of Lithospheric Evolution Open Subject ; State Key Laboratory of Lithospheric Evolution Open Subject ; State Key Laboratory of Lithospheric Evolution Open Subject ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; Key Research Program of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; Key Research Program of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; Key Research Program of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; State Key Laboratory of Lithospheric Evolution Open Subject ; State Key Laboratory of Lithospheric Evolution Open Subject ; State Key Laboratory of Lithospheric Evolution Open Subject ; State Key Laboratory of Lithospheric Evolution Open Subject ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; Key Research Program of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; Key Research Program of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; Key Research Program of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; State Key Laboratory of Lithospheric Evolution Open Subject ; State Key Laboratory of Lithospheric Evolution Open Subject ; State Key Laboratory of Lithospheric Evolution Open Subject ; State Key Laboratory of Lithospheric Evolution Open Subject ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; Key Research Program of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; Key Research Program of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; Key Research Program of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; State Key Laboratory of Lithospheric Evolution Open Subject ; State Key Laboratory of Lithospheric Evolution Open Subject ; State Key Laboratory of Lithospheric Evolution Open Subject ; State Key Laboratory of Lithospheric Evolution Open Subject ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; Key Research Program of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; Key Research Program of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; Key Research Program of the Institute of Geology and Geophysics, Chinese Academy of Sciences |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/102587]  |
| 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 | Zhou, Qifeng; Qin, Kezhang |
| 作者单位 | 1.China Met Geol Bur, Inst Mineral Resources Res, Beijing 101300, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 3.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China 4.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhou, Qifeng,Qin, Kezhang,Tang, Dongmei. Mineralogy of columbite-group minerals from the rare-element pegmatite dykes in the East-Qinling orogen, central China: Implications for formation times and ore genesis[J]. JOURNAL OF ASIAN EARTH SCIENCES,2021,218:21. |
| APA | Zhou, Qifeng,Qin, Kezhang,&Tang, Dongmei.(2021).Mineralogy of columbite-group minerals from the rare-element pegmatite dykes in the East-Qinling orogen, central China: Implications for formation times and ore genesis.JOURNAL OF ASIAN EARTH SCIENCES,218,21. |
| MLA | Zhou, Qifeng,et al."Mineralogy of columbite-group minerals from the rare-element pegmatite dykes in the East-Qinling orogen, central China: Implications for formation times and ore genesis".JOURNAL OF ASIAN EARTH SCIENCES 218(2021):21. |
入库方式： OAI收割
来源：地质与地球物理研究所
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