| 新疆瓦石峡南锂铍矿地质特征以及磷灰石对成矿的指示 |
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| 关键词:southern Washixia apatite granite pegmatite S-type granite |
| 基金项目:国家重点研发计划“战略性矿产资源开发利用”专项“我国西部伟晶岩型锂等稀有金属成矿规律与勘查技术”项目(编号: 2021YFC2901902)；中国地质调查局“中国矿产地质志”项目(编号: DD20221695) |
| 作者 | 单位 | E-mail | | 王国庆 | 长安大学地球科学与资源学院, 陕西西安 710054
西安市关键金属成矿与高效利用重点实验室, 陕西西安 710054 | 1372153885@qq.com | | 梁婷 | 长安大学地球科学与资源学院, 陕西西安 710054
西安市关键金属成矿与高效利用重点实验室, 陕西西安 710054 | Liangt@chd.edu.cn | | 刘艳荣 | 长安大学地球科学与资源学院, 陕西西安 710054
西安市关键金属成矿与高效利用重点实验室, 陕西西安 710054 | fwjlyr@chd.edu.cn | | 杨智全 | 新疆维吾尔自治区地质矿产勘查开发局第三地质大队, 新疆库尔勒 841000 | | | 张朋 | 新疆维吾尔自治区地质矿产勘查开发局第三地质大队, 新疆库尔勒 841000 | | | 王登红 | 中国地质科学院矿产资源研究所, 北京 100037 | | | 凤永刚 | 长安大学地球科学与资源学院, 陕西西安 710054
西安市关键金属成矿与高效利用重点实验室, 陕西西安 710054 | | | 高景刚 | 长安大学地球科学与资源学院, 陕西西安 710054
西安市关键金属成矿与高效利用重点实验室, 陕西西安 710054 | | | 谭细娟 | 长安大学地球科学与资源学院, 陕西西安 710054
西安市关键金属成矿与高效利用重点实验室, 陕西西安 710054 | |
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| Geological Characteristics of Li-Be Deposit in the Southern Washixia, Xinjiang and the Indication of Apatite on Mineralization |
| In recent years, significant breakthroughs have been made in rare metal prospecting in the Altyn Tagh of Xinjiang Province, leading to the discovery of new rare metal deposits such as southern Washixia, Ayak, Tugeman, and Xichanggou. The southern Washixia lithium-beryllium deposit is located in the western section of the Altyn Tagh metallogenic belt and was discovered by the Third Geological Brigade of the Xinjiang Bureau of Geology and Mineral Resources in 2020. More than 20 pegmatite veins have been identified, including 9 rare metal granite pegmatite veins. At present, the level of exploration and research is relatively low. In this paper, apatite in the Li-bearing granite pegmatite vein of ρ9 in mining area is taken as the research object, and the indicative role of apatite in the mineralization of granite pegmatite is discussed through mineralogical and geochemical analysis. Through microscope and backscattered electron image observations, apatite can be divided into two stages: magmatic stage and hydrothermal stage. Electron probe and in situ LA-ICP-MS analyses confirm that the apatite in the veins is mainly fluoro-hydroxyapatite. The geochemical characteristics indicate that the ρ9 Li-bearing granite pegmatite originates from the reducing magma of partial melting of crustal materials and is a P-rich granite pegmatite (highly differentiated peraluminous granite with an average P2O5>0.42%) with characteristics of S-type granite, formed in a reducing environment with low oxygen fugacity. By exploring the source and evolution process of granite magma in the mining area, as well as its indications for mineralization, it is speculated that the P-rich characteristics of the lithium-bearing granite pegmatite in the ρ9 vein of southern Washixia is due to the P-rich peraluminous magmatic system that promotes the enrichment of rare metals. |
| WANG Guoqing,LIANG Ting,LIU Yanrong,YANG Zhiquan,ZHANG Peng,WANG Denghong,FENG Yonggang,GAO Jinggang,TAN Xijuan.2025.Geological Characteristics of Li-Be Deposit in the Southern Washixia, Xinjiang and the Indication of Apatite on Mineralization[J].Acta Geoscientica Sinica,46(1):116-130. |
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