| 湘东北地区伟晶岩型锂矿成矿模型及找矿潜力分析 |
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| 关键词:Li bearing pegmatite spodumene Chuanziyuan deposit Huangboshan metallogenic model metallogenic potentia |
| 基金项目:湖南省重点领域研发计划项目(编号: 2019SK2261);国家重点研发计划项目(编号: 2017YFC0601402);有色金属成矿预测与地质环境监测教育部重点实验室(中南大学)开放基金项目(编号: 2021YSJS04);湖南省自然科学基金(编号: 2021JJ30387);湖南省地质院科研项目(编号: HNGSTP202105);湖南省专项科普专题(编号: 2020ZK4082) |
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| 摘要: |
| The Metallogenic Model and Prospecting Potentiality of the Pegmatite Type Li Deposit in Northwestern Hunan Province |
| The rare metal deposits in Mufushan district, such as the Chuanziyuan Li-Nb-Ta deposit found in the 1970s and the Huangboshan and Zhaibandong Li deposits found in recent years, presently lack proper system evaluation targeting Li resources. However, Li is a key raw material in new energy industry development, with a growing demand. It is therefore necessary to analyze the metallogenic potential of the Li deposits in the Mufushan area. Using systematic field geological surveys of the Li-pegmatites in the Chuanziyuan, Huangboshan, and Zhaibandong Li deposits, this study analyzed the characteristics of the distribution and potentiality of the Li-pegmatites and showed that they are distributed far from the Mufushan batholith and that the Li mineralization occurs in the top the LCT-type pegmatites. Both the Li-pegmatites and Nb-Ta-pegmatites have the same diagenesis and mineralization ages (140~130 Ma), which occurred slightly later than the two-mica monzogranite (143~138 Ma). Furthermore, the pegmatites in this area have the same provenance as the two-mica monzogranite. Thus, here, we propose that the two-mica monzogranite could be the parental rock of the rare metal (Li-Nb-Ta) pegmatites and established the metallogenic model accordingly. Based on this forecasting model for the “Chuanziyuan” type Li deposit, we concluded that there are 101 900 tonnes of Li2O resources in the Huangboshan–Chuanziyuan and Zhaibandong–Suodun prospect area, showing that a large-scale Li deposit could exist in northwestern Hunan province. |
| HUANG Jian-zhong,CHEN Jian-feng,WEN Chun-hua,ZHOU Hou-xiang,LI Sheng-miao,ZHANG Li-ping,HUANG Zhi-biao,CHENG Yong-sheng,CAO Chuang-hua,LIU Jun,CHEN Hu.2022.The Metallogenic Model and Prospecting Potentiality of the Pegmatite Type Li Deposit in Northwestern Hunan Province[J].Acta Geoscientica Sinica,43(4):527-541. |
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