GAO JingGang, LIANG Ting, FENG YongGang, TAN Xijuan, LIU Yanrong, LI Yong, ZHAO Ruyi, ZHOU Bin, and ZHANG Jianxin. Relationship between Indosinian magmatic activity and Li-Be-rare metal mineralization in the eastern section of West Kunlun and its implications for prospecting[J]. GEOLOGY IN CHINA. DOI: 10.12029/gc20230314001
Citation:
GAO JingGang, LIANG Ting, FENG YongGang, TAN Xijuan, LIU Yanrong, LI Yong, ZHAO Ruyi, ZHOU Bin, and ZHANG Jianxin. Relationship between Indosinian magmatic activity and Li-Be-rare metal mineralization in the eastern section of West Kunlun and its implications for prospecting[J]. GEOLOGY IN CHINA. DOI: 10.12029/gc20230314001
GAO JingGang, LIANG Ting, FENG YongGang, TAN Xijuan, LIU Yanrong, LI Yong, ZHAO Ruyi, ZHOU Bin, and ZHANG Jianxin. Relationship between Indosinian magmatic activity and Li-Be-rare metal mineralization in the eastern section of West Kunlun and its implications for prospecting[J]. GEOLOGY IN CHINA. DOI: 10.12029/gc20230314001
Citation:
GAO JingGang, LIANG Ting, FENG YongGang, TAN Xijuan, LIU Yanrong, LI Yong, ZHAO Ruyi, ZHOU Bin, and ZHANG Jianxin. Relationship between Indosinian magmatic activity and Li-Be-rare metal mineralization in the eastern section of West Kunlun and its implications for prospecting[J]. GEOLOGY IN CHINA. DOI: 10.12029/gc20230314001
Relationship between Indosinian magmatic activity and Li-Be-rare metal mineralization in the eastern section of West Kunlun and its implications for prospecting
1. School of Earth Science and Resources, Chang'an University, Xi'an 710054, Shanxi, China;
2. Laboratory of Mineralization and Dynamics, Chang'an University, Xi'an 710054, Shanxi, China;
3. Institute of Geological and Mineral Exploration, Xinjinag Non-rerrous Geological Exploration Bureau, Urumqi 830000, Xinjinag, China;
4. State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, Jiangxi, China;
5. Northwest bureau of China metallurgical geology bureau, Xi'an 710119, Shanxi, China
Funds:
Supported by the National Key Research and Development Program of China (No.2021YFC2901902) and project of China Geological Survey (No. DD20190379-53).
This paper is the result of mineral exploration engineering. [Objective] The aim of this paper is to investigate the relationship of Li-Be-rare metal mineralization and Indosinian magmatism in the eastern part of the West Kunlun Orogenic Belt through a comprehensive study of Indosinian magmatic activities, granite chronology, and geochemical characterization. Furthermore, the corresponding metallogenic regularity is summarized, and the exploration prospecting of rare metal pegmatite deposits is given. [Methods] Based on the our recent research, the geological details in the eastern part of the West Kunlun Orogenic Belt, including ages, mineral assemblages, geochemical characteristics, isotopic characteristics (Hf, Nd and Li, etc.) of the Indosinian magmas, are summarized and fully compared for the first time. The genetic link between the pegmatite-hosted Li-Be-rare metal mineralization and Indosinian magmatism is investigated. [Results] The large composite granite pluton formed in Indosinian period in the eastern part of the West Kunlun Orogenic Belt is mainly composed of quartz diorite, biotite monzogranite and two-mica monzogranite (including garnet tourmaline two-mica monzogranite), which was formed due to partial melting of the crust in a post-collision regime. The reliable chronological data show that there is no age difference between the composite granite (216.7~208.8Ma) and the granitic pegmatites (211.9~208.1Ma), suggesting that they were formed at the same time. The characteristics of minerals (garnet, tourmaline) and Li isotopes indicate that the two-mica monzogranite (garnet tourmaline two-mica monzogranite), garnet-bearing tourmaline muscovite granite pegmatite and spodumene-albite pegmatite were likely derived from the same magma source. [Conclusions] Results show that two-mica monzogranite and in particular garnet, tourmaline-bearing two-mica monzogranite exhibit close relationship with the pegmatite-type rare metal deposits. The peripheries of Aktas and the 509 Daoban-Quanshuigou area are favorable section for prospecting lithium-rich pegmatite.
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