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Volatile accumulation for the mineralization of Li-Be pegmatites in the northeastern Pamir, Western Kunlun, China
Zhu, Mingtian1; Dong, Zhiguo2; Zhang, Lianchang3
2022-06-12
Source PublicationINTERNATIONAL GEOLOGY REVIEW
ISSN0020-6814
Pages18
AbstractLi-Be mineralization in the northeastern Pamir is the most westerly portion of the newly defined Western Kunlun-Songpan-Ganze rare metal belt in China. This paper discusses the geochemistry and isotopic U-Pb-Sr-Nd-Hf systems of two Triassic granites and Li-Be pegmatites, trying to identify their genetic relationship. Our study shows that although the biotite monzogranites, the muscovite granites, and the Li-Be pegmatites have similar zircon and coltan U-Pb ages of 210 Ma, continuous crystallization could not completely account for their compositional and Sr-Nd-Hf isotopic diversity. In comparison with the biotite monzogranites, the muscovite granites exhibit strongly fractionated characteristics, with higher levels of SiO2, K2O, P2O5, Li, Be, Cs, Rb, and Ta, and are sourced from a partial melt of meta-pelite rocks, showing a genetical relationship with the Li-Be pegmatites. A model of volatile accumulation is an attempt to interpret some characteristics of the strongly fractionated muscovite granites and Li-Be pegmatites, which show dramatically elevated contents of P2O5 of 0.20-0.23% to Li-Be pegmatites of 0.4-2.64%, respectively. P2O5 might be an agency of the accumulation of fluxing compositions also including B, F, and H2O. Succeeding pegmatite-forming fluid exsolution and selective removal of Ca-Na-K to precipitate feldspar minerals far away from the parent granites should be accountable for some strongly fractionated characteristics in the residual melt, e.g. the enrichment of Rb, loss of Sr and Ba, and elevated negative Eu anomaly. Furthermore, this selective extractant of alkalis metal triggered by the accumulation of flux notably enhanced the contents of Li and Be in the remaining melts by three times, which might be also an important mechanism for the rare metal concentration in the Li-Be pegmatites by thousands of times.
KeywordP anomaly volatile accumulation Li-Be pegmatite Western Kunlun
DOI10.1080/00206814.2022.2087109
Funding OrganizationSecond Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau
WOS KeywordPOTASSIC MICROGRANULAR ENCLAVES ; CALC-ALKALINE GRANITOIDS ; MARKAM GNEISS DOME ; TECTONIC EVOLUTION ; ACCRETIONARY TECTONICS ; TIBETAN PLATEAU ; NORTHWEST CHINA ; TRACE-ELEMENT ; BLACK-HILLS ; ICP-MS
Language英语
Funding ProjectSecond Comprehensive Scientific Survey of the Qinghai-Tibet Plateau[2019QZKK0802]
Funding OrganizationSecond Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau
WOS Research AreaGeology
WOS SubjectGeology
WOS IDWOS:000809735400001
PublisherTAYLOR & FRANCIS INC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/106075
Collection矿产资源研究院重点实验室
Corresponding AuthorZhu, Mingtian
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing, Peoples R China
3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China
First Author AffilicationKey Laboratory of Mineral Resources, Chinese Academy of Sciences
Corresponding Author AffilicationKey Laboratory of Mineral Resources, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zhu, Mingtian,Dong, Zhiguo,Zhang, Lianchang. Volatile accumulation for the mineralization of Li-Be pegmatites in the northeastern Pamir, Western Kunlun, China[J]. INTERNATIONAL GEOLOGY REVIEW,2022:18.
APA Zhu, Mingtian,Dong, Zhiguo,&Zhang, Lianchang.(2022).Volatile accumulation for the mineralization of Li-Be pegmatites in the northeastern Pamir, Western Kunlun, China.INTERNATIONAL GEOLOGY REVIEW,18.
MLA Zhu, Mingtian,et al."Volatile accumulation for the mineralization of Li-Be pegmatites in the northeastern Pamir, Western Kunlun, China".INTERNATIONAL GEOLOGY REVIEW (2022):18.
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