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Chemical evolution of micas and Nb-Ta oxides from the Koktokay pegmatites, Altay, NW China: Insights into rare-metal mineralization and genetic relationships

文献类型：期刊论文

作者Cao, Chong2,3; Shen, Ping3,4,5,6; Bai, Yingxiong3,4; Luo, Yaoqing3,4; Feng, Haoxuan3,4; Li, Changhao3,4; Pan, Hongdi1
刊名ORE GEOLOGY REVIEWS
出版日期2022-07-01
卷号146页码:12
关键词Koktokay rare-element pegmatite Mineralization potential Genetic relationship Melt immiscibility Hydrothermal processes
ISSN号0169-1368
DOI10.1016/j.oregeorev.2022.104933
英文摘要This study focuses on the differences in the mineralization potentials and genetic relationships between representative rare-metal pegmatites and the muscovite granite in the Koktokay field in Altay, China, as well as the possible roles that magmatic and/or hydrothermal activities played in enriching the related rare metals. To this end, the major-and trace-element compositions of micas, the major-element compositions of Nb-Ta oxides, and the Li isotopic compositions of Li-rich muscovite, lepidolite, and spodumene were systematically analyzed. The major element compositions of the micas in the No. 1 and No. 2 pegmatites are quite similar. However, the MgO (0.89-2.18 wt%) and F (0.66-2.01 wt%) contents of the micas in the contact zone of the No.3 pegmatite are higher than those of the micas in the No. 1 and No. 2 pegmatites. In addition, the MnO (0.37-0.46 wt%) and MgO (0.39-0.59 wt%) contents of the micas in the muscovite granite are distinctly higher than those of the micas in the studied pegmatites. The trace-element compositions reveal that the primary micas from the small No. 1 and No. 2 pegmatites have significantly lower Li, Be, Ta, and Cs contents and a narrower range of fractionation relative to those in the large No. 3 pegmatite, indicating a significant difference in the rare-metal mineralization potentials of these pegmatites. Moreover, there is a large difference in the delta Li-7 values of the Li-rich minerals in the muscovite granites (-4.37-0.07%o), No. 3 (4.3-6.81%o) and No. 1 (7.44-14.65%o) pegmatites. These results support the hypothesis that the muscovite granite and pegmatite dikes may have formed independent of each other, and that their formations were a consequence of multi-stage magmatic activities. In addition, the Nb-Ta oxides in the outer zones are mainly columbite-(Mn). The large differences in the Nb/Ta ratios of the columbite-(Mn) (1.83-14.91) and primary micas (2.22-10.41) in the outer zones could be the result of silicate-silicate melt immiscibility. Furthermore, the low Nb/Ta ratios (commonly < 5) of the bright overgrowths of the columbite-(Mn) may have crystallized directly from a hydrous alkali-halogen-rich melt rather than from a hydrothermal fluid. The distinctly higher Ta (39-167 ppm), Cs (275-579 ppm), and B (213-245 ppm) contents; considerable Li contents (400-554 ppm), and lower Nb/Ta ratios (0.5-3.2) of the hydrothermal micas suggest that hydrothermal processes played an important role in the additional enrichment of the related rare metals (e. g., Ta, Cs, Li, and B).
WOS关键词MAGMATIC-HYDROTHERMAL TRANSITION ; NO. 3 PEGMATITE ; GRANITIC PEGMATITE ; TEXTURAL FEATURES ; PERALUMINOUS GRANITES ; ISOTOPE FRACTIONATION ; NORTHWESTERN CHINA ; ELEMENT PEGMATITES ; AQUEOUS FLUIDS ; BLACK-HILLS
资助项目National Natural Science Foundation of China[91962213] ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences[132A11KYSB20190070] ; Regional Collaborative Innovation Project, Xinjiang[2020E01043] ; Natural Science Foundation of Hebei province of China[D2020209017]
WOS研究方向Geology ; Mineralogy ; Mining & Mineral Processing
语种英语
WOS记录号WOS:000806846500001
出版者ELSEVIER
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; Regional Collaborative Innovation Project, Xinjiang ; Regional Collaborative Innovation Project, Xinjiang ; Regional Collaborative Innovation Project, Xinjiang ; Regional Collaborative Innovation Project, Xinjiang ; Natural Science Foundation of Hebei province of China ; Natural Science Foundation of Hebei province of China ; Natural Science Foundation of Hebei province of China ; Natural Science Foundation of Hebei province of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; Regional Collaborative Innovation Project, Xinjiang ; Regional Collaborative Innovation Project, Xinjiang ; Regional Collaborative Innovation Project, Xinjiang ; Regional Collaborative Innovation Project, Xinjiang ; Natural Science Foundation of Hebei province of China ; Natural Science Foundation of Hebei province of China ; Natural Science Foundation of Hebei province of China ; Natural Science Foundation of Hebei province of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; Regional Collaborative Innovation Project, Xinjiang ; Regional Collaborative Innovation Project, Xinjiang ; Regional Collaborative Innovation Project, Xinjiang ; Regional Collaborative Innovation Project, Xinjiang ; Natural Science Foundation of Hebei province of China ; Natural Science Foundation of Hebei province of China ; Natural Science Foundation of Hebei province of China ; Natural Science Foundation of Hebei province of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; Regional Collaborative Innovation Project, Xinjiang ; Regional Collaborative Innovation Project, Xinjiang ; Regional Collaborative Innovation Project, Xinjiang ; Regional Collaborative Innovation Project, Xinjiang ; Natural Science Foundation of Hebei province of China ; Natural Science Foundation of Hebei province of China ; Natural Science Foundation of Hebei province of China ; Natural Science Foundation of Hebei province of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/106070]  
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Shen, Ping
作者单位1.Changan Univ, Coll Earth Sci, Xian 710054, Peoples R China
2.North China Univ Sci & Technol, Tangshan 063210, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
4.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
6.19 Beitucheng Western Rd, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Cao, Chong,Shen, Ping,Bai, Yingxiong,et al. Chemical evolution of micas and Nb-Ta oxides from the Koktokay pegmatites, Altay, NW China: Insights into rare-metal mineralization and genetic relationships[J]. ORE GEOLOGY REVIEWS,2022,146:12.
APA Cao, Chong.,Shen, Ping.,Bai, Yingxiong.,Luo, Yaoqing.,Feng, Haoxuan.,...&Pan, Hongdi.(2022).Chemical evolution of micas and Nb-Ta oxides from the Koktokay pegmatites, Altay, NW China: Insights into rare-metal mineralization and genetic relationships.ORE GEOLOGY REVIEWS,146,12.
MLA Cao, Chong,et al."Chemical evolution of micas and Nb-Ta oxides from the Koktokay pegmatites, Altay, NW China: Insights into rare-metal mineralization and genetic relationships".ORE GEOLOGY REVIEWS 146(2022):12.

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来源：地质与地球物理研究所

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