New discovery and regional prospecting potentiality of greisen-type lithium mineralization in the Shilei tungsten and tin deposit, Southern Jiangxi Province
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摘要:
近年来，随着赣西北云母型锂矿的大规模开发利用，华南云英岩型、蚀变花岗岩型等岩体型锂矿逐渐受到关注。赣南是世界著名石英脉型黑钨矿集区和生产基地，以往勘查研究工作多集中在钨锡矿。
研究目的 为进一步了解石英脉型钨锡矿中是否存在锂矿化及其地质特征。
研究方法 本次研究通过系统的岩矿鉴定和激光剥蚀电感耦合等离子体质谱仪（LA-ICP-MS）分析，查明了在赣南崇余犹矿集区章源钨业石雷钨锡矿深部存在云英岩型锂矿。
研究结果 研究表明，锂矿体产于石雷矿区深部隐伏花岗岩体的顶部，分布于含钨锡石英脉和长石石英脉的两侧，锂元素主要赋存在白云母—多硅白云母之中。产于角岩化砂岩中的云英岩的Li2O含量平均为0.25%，二云母花岗岩中石英（长石）脉—云英岩Li2O含量平均为0.21%，二云母花岗岩中发育的含云母脉云英岩Li2O平均为0.22%，具有潜在的综合利用价值。
结论 本次研究查明了石雷石英脉型钨锡矿中存在工业意义的云英岩型锂矿化，进一步丰富了赣南石英脉型钨锡矿的成矿理论，拓宽了崇余犹地区云英岩型锂矿的找矿勘查思路，并为进一步拓展华南地区岩体型锂矿的找矿空间提供了依据。
Abstract:This paper is the result of mineral exploration engineering. In recent years, with the large-scale exploitation of mica-type lithium deposits in the Northwest of Jiangxi Province, hard-rock-type lithium deposits, such as greisen-type and altered granite-type in south China block, have gradually attracted more and more attention. Southern Jiangxi Province is a world-famous quartz vein-type wolframite mining district and producing base. In the past, exploration and research work mainly focused on the tungsten and tin deposits.
Objective In order to further understand whether lithium mineralization exists in quartz vein type tungsten tin ore and its geological characteristics.
Methods This study was conducted through systematic microscope identification and laser ablation inductively coupled plasma mass spectrometer (LA-ICP-MS) analysis.
Results Greisen-type lithium ore was found in the deep part of Shilei tungsten and tin deposit in Chongyuyou Ore cluster located in the Southern Jiangxi Province. The lithium ore body occurred at the top of the deep concealed granite body, and distributed on two sides of W-Sn-bearing quartz-vein and feldspar quartz-vein. Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) analysis and microscope identification show that lithium mainly found in muscovite-phengite. The average Li2O content of greisen in hornfelsic sandstone is 0.25%, the average Li2O content of quartz (feldspar) vein greisen in mica granite is 0.21%, and the average Li2O content of mica vein-bearing greisen developed in mica granite is 0.22%, which shows potential comprehensive utilization value.
Conclusions In this study, lithium mineralization of industrial significance is identified in Shilei quartz vein-type tungsten tin deposit. The discovery enriched the metallogenic theory of tungsten and tin deposits in the Southern Jiangxi Province, broadened the prospecting and exploration ideas of greisen-type lithium deposits in Chongyuyou ore cluster, and provided a basis for further expanding the prospecting space of hard-rock-type lithium deposit in South China Block.
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表 1 ZKn11-11云英岩W、Sn、Li测试分析结果
Table 1. The W, Sn, Li analysis results of greisen samples of ZKn11-11
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表 2 石雷矿区云英岩中云母LA-ICP-MS原位分析结果
Table 2. LA-ICP-MS in-situ analysis results of mica of greisen in the Shilei mining area
下载: 导出CSV
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