| 中国西部主要伟晶岩型锂辉石矿床成矿作用对比及找矿前景 |
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| 作者姓名： | 涂其军 李建康 王刚 马宏超 |
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| 作者单位： | 1.新疆维吾尔自治区地质矿产勘查开发局第二区域地质调查大队,昌吉 831100;
2.中国地质科学院矿产资源研究所,自然资源部成矿作用与资源评价重点实验室,北京 100037;
3.新疆维吾尔自治区地质调查院,乌鲁木齐 830000 |
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| 基金项目： | 中国地质调查局“松潘-甘孜成锂带锂铍多金属大型资源基地综合调查评价(编号: DD20190173)”“我国锂能源金属成矿规律、靶区优选与重点查证(编号: 2017YFC0602701)”“西部之光访问学者”项目联合资助 |
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| 摘 要： | 为了解中国西部伟晶岩型锂矿床的成矿地质背景和矿床地质特征,指导今后该类锂铍等稀有金属矿产资源勘查与评价,总结研究了中国西部几个主要的大型、超大型伟晶岩型锂辉石矿床的成矿特点,并简要对比这些矿床的成矿地质背景、矿床地质特征等。结果表明: 中国西部伟晶岩型锂辉石矿床所处的大地构造位置较为相似,大多处于褶皱造山带中,呈现集中成带分布,稀有金属矿化均发育在岩浆岩后期的伟晶岩脉中,围岩均为一套变质砂岩、板岩、片岩类,伟晶岩脉的含矿性还与构造裂隙的交叉和相对封闭条件有关; 成矿时代集中分布在印支晚期-燕山早期。但不同地区的锂辉石矿床也表现出其特殊性,矿物组合上以可可托海最为复杂,甲基卡次之。今后勘查应以锂成矿带为重点,伟晶岩型锂矿为首要勘查对象,同时应因地制宜,以现有的典型矿床为模型,寻找最有效的找矿技术方法组合,为后期找矿提供依据。
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| 关 键 词： | 伟晶岩型 锂辉石 典型矿床 中国西部 |
| 收稿时间： | 2019-11-08 |
Mineralization comparisons of the major pegmatite type spodumene deposits and their prospecting potential in West China |
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| Authors: | TU Qijun LI Jiankang WANG Gang MA Hongchao |
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| Institution: | 1. No.2 Regional Geological Survey Party, Xinjiang Bureau of Geo-Exploration and Mineral Development, Changji 831100,China;
2. Key Laboratory of Metallogeny and Mineral Assessment, Ministry of Natural Resources, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China;
3. Xinjiang Institute of Geological Survey, Urumqi 830000, China |
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| Abstract: | This paper aims at exploring the metallogenic background and characteristics of pegmatite type lithium deposits and guiding the exploration and evaluation of rare metal mineral resources including Li and Be in West China in the future. The authors summarized the metallogenic characteristics of several major large-scale and superlarge pegmatite type spodumene deposits in West China, and briefly compared the metallogenic background and characteristics of these deposits. The results show that the pegmatite type spodumene deposits in West China are located in similar geotectonic positions, mostly in the fold orogenic belts, with centralized zonation distribution. The rare metal mineralization was all developed in the pegmatite vein in the late magmatic rock, and the surrounding rocks were a set of metamorphic sandstone, slate and schist. The ore-bearing properties of pegmatite vein are also related with the structural fractures and closure conditions. The metallogenic epoch is from late Indosinian to early Yanshanian, and spodumene-bearing deposits in different areas also show their particularities. For example, the mineral assemblage of Keotohai is the most complex, and followed by Jiajika. In the future, the exploration should focus on the lithium metallogenic belt, and the pegmatite type lithium deposit should be the primary exploration object. Meanwhile, we should take the existing typical deposits as the model to find the most effective combination of prospecting technology and methods according to local conditions, to provide a basis for further prospecting. |
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| Keywords: | pegmatite type spodumene typical deposits West China |
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