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Highly fractionated leucogranites in the eastern Himalayan Cuonadong dome and related magmatic Be-Nb-Ta and hydrothermal Be-W-Sn mineralization
Xie, Lei1; Tao, Xiangyuan1; Wang, Rucheng1; Wu, Fuyuan2; Liu, Chen1; Liu, Xiaochi2; Li, Xingkui1; Zhang, Rongqing1
2020-02-01
Source PublicationLITHOS
ISSN0024-4937
Volume354Pages:19
AbstractLeucogranitic rocks, including two-mica granite, muscovite granite, and granitic pegmatite (aplite), crop out in the eastern Himalayan Cuonadong dome, southern Tibet. These rocks have high SiO2 (similar to 73 wt.%), Al2O3(similar to 16 wt.%), and total alkali contents (similar to 9 wt.%), and are peraluminous with A/CNK ratios of 1.0-1.1. Whole-rock major and trace element data and mineral compositions reveal strong differentiation and fractionation trends for the two-mica granite, muscovite granite, and pegmatite-aplite dikes. Albite, muscovite, and garnet contents increased as the leucogranitic magma evolved, whereas K-feldspar and biotite contents decreased. Muscovite in aplite has higher Rb2O (similar to 0.4 wt.%), Nb (similar to 219 ppm), and W + Sn (similar to 737 ppm) contents, and lower Nb/Ta ratios (similar to 6) than muscovite in the two-mica and muscovite granites. Garnet varies in composition from almandine in the leucogranites to spessartine in the aplites. The muscovite granite and pegmatite are associated with rare-metal mineralization. Rare-metal-bearing minerals include beryl, columbite-group minerals, tapiolite, Nb-Ta-bearing rutile, cassiterite, and wolframite. Skarn and altered (i.e., chloritized) rocks along the margins of the leucogranites are the products of hydrothermal reaction between leucogranite and marble. Beryl, scheelite, and cassiterite occur in the skarn and altered rocks. Rare-metal mineralization in the Cuonadong dome can be divided into two types: magmatic Be-Nb-Ta mineralization related to pegmatite-aplite dikes and hydrothermal Be-W-Sn mineralization hosted in the skarn and associated with the two-mica and muscovite granites. Monazite U-Th-Pb dating reveals two episodes of leucogranitic magmatism in the Cuonadong dome at ca. 20 and 17 Ma. Columbite U-Pb dating indicates two stages of rare-metal mineralization at ca. 17 and 14 Ma (including tapiolite). It is inferred that magmatism was related to the exhumation of the Higher Himalayan Crystalline Basement, with the degree of differentiation of the associated leucogranites being the key factor controlling the type of mineralization. (C) 2019 Elsevier B.V. All rights reserved.
KeywordBeryl Columbite Tapiolite U-(Th)-Pb dating Differentiation of leucogranite Southern Tibet
DOI10.1016/j.lithos.2019.105286
Funding OrganizationNatural Science Foundation of China ; Natural Science Foundation of China ; Second Comprehensive Scientific Investigation into Qinghai-Tibet Plateau ; Second Comprehensive Scientific Investigation into Qinghai-Tibet Plateau ; Fundamental Research Funds for the Central Universities, China ; Fundamental Research Funds for the Central Universities, China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Second Comprehensive Scientific Investigation into Qinghai-Tibet Plateau ; Second Comprehensive Scientific Investigation into Qinghai-Tibet Plateau ; Fundamental Research Funds for the Central Universities, China ; Fundamental Research Funds for the Central Universities, China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Second Comprehensive Scientific Investigation into Qinghai-Tibet Plateau ; Second Comprehensive Scientific Investigation into Qinghai-Tibet Plateau ; Fundamental Research Funds for the Central Universities, China ; Fundamental Research Funds for the Central Universities, China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Second Comprehensive Scientific Investigation into Qinghai-Tibet Plateau ; Second Comprehensive Scientific Investigation into Qinghai-Tibet Plateau ; Fundamental Research Funds for the Central Universities, China ; Fundamental Research Funds for the Central Universities, China
WOS KeywordOXIDE MINERALS ; TRACE-ELEMENTS ; GEOCHEMICAL EVIDENCE ; TETHYAN HIMALAYA ; JIANGXI PROVINCE ; SOUTHERN TIBET ; GRANITIC MELTS ; U-PB ; PEGMATITE ; DEPOSIT
Language英语
Funding ProjectNatural Science Foundation of China[91855209] ; Natural Science Foundation of China[41572045] ; Second Comprehensive Scientific Investigation into Qinghai-Tibet Plateau[2019QZKK0803] ; Fundamental Research Funds for the Central Universities, China[14380087]
Funding OrganizationNatural Science Foundation of China ; Natural Science Foundation of China ; Second Comprehensive Scientific Investigation into Qinghai-Tibet Plateau ; Second Comprehensive Scientific Investigation into Qinghai-Tibet Plateau ; Fundamental Research Funds for the Central Universities, China ; Fundamental Research Funds for the Central Universities, China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Second Comprehensive Scientific Investigation into Qinghai-Tibet Plateau ; Second Comprehensive Scientific Investigation into Qinghai-Tibet Plateau ; Fundamental Research Funds for the Central Universities, China ; Fundamental Research Funds for the Central Universities, China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Second Comprehensive Scientific Investigation into Qinghai-Tibet Plateau ; Second Comprehensive Scientific Investigation into Qinghai-Tibet Plateau ; Fundamental Research Funds for the Central Universities, China ; Fundamental Research Funds for the Central Universities, China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Second Comprehensive Scientific Investigation into Qinghai-Tibet Plateau ; Second Comprehensive Scientific Investigation into Qinghai-Tibet Plateau ; Fundamental Research Funds for the Central Universities, China ; Fundamental Research Funds for the Central Universities, China
WOS Research AreaGeochemistry & Geophysics ; Mineralogy
WOS SubjectGeochemistry & Geophysics ; Mineralogy
WOS IDWOS:000514217200041
PublisherELSEVIER
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/95588
Collection岩石圈演化国家重点实验室
Corresponding AuthorXie, Lei
Affiliation1.Nanjing Univ, Sch Earth Sci & Engn, State Key Lab Mineral Deposits Res, Nanjing 210023, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
Recommended Citation
GB/T 7714
Xie, Lei,Tao, Xiangyuan,Wang, Rucheng,et al. Highly fractionated leucogranites in the eastern Himalayan Cuonadong dome and related magmatic Be-Nb-Ta and hydrothermal Be-W-Sn mineralization[J]. LITHOS,2020,354:19.
APA Xie, Lei.,Tao, Xiangyuan.,Wang, Rucheng.,Wu, Fuyuan.,Liu, Chen.,...&Zhang, Rongqing.(2020).Highly fractionated leucogranites in the eastern Himalayan Cuonadong dome and related magmatic Be-Nb-Ta and hydrothermal Be-W-Sn mineralization.LITHOS,354,19.
MLA Xie, Lei,et al."Highly fractionated leucogranites in the eastern Himalayan Cuonadong dome and related magmatic Be-Nb-Ta and hydrothermal Be-W-Sn mineralization".LITHOS 354(2020):19.
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