| 贵州平桥地区含锂岩石特征及锂的赋存状态研究 |
| 投稿时间：2024-09-10 修订日期：2024-12-10 点此下载全文 |
| 引用本文：杨光龙.贵州平桥地区含锂岩石特征及锂的赋存状态研究[J].地质与勘探,2025,61(1):74-84 |
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| 基金项目:贵州省地矿局科研项目“贵州省六盘水地区锂绿泥石型锂矿赋存状态及综合利用研究”（编号：黔地矿科[2020]25号）资助 |
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| 中文摘要:为确定贵州六枝特区平桥地区含锂岩系特征及锂的赋存状态，本次研究采集了贵州平桥LZK201钻孔含锂蚀变带综合样，其Li2O平均含量为0.60%，并通过X粉晶衍射、扫描电镜、光谱分析和MLA检测，对含锂岩石特征、原矿化学组成、矿物组成、结构构造和锂的赋存状态等进行研究。研究结果表明：研究区含锂岩石赋存于石炭系至二叠系南丹组顶部强硅化角砾岩带和弱硅化绿泥石化蚀变带，该蚀变带为一套强硅化灰岩角砾岩、绿泥石化泥灰岩、硅化钙质粘土岩等岩石组合；矿石矿物主要由锂绿泥石（22.02%）、高岭石（18.30%）、方解石（25.27%）、石英（24.25%）、黄铁矿（5.05%）组成，具蚀变残余结构、显微粒状结构和条带-层纹构造、无定向块状构造，成因类型属“蚀变泥灰岩型”；锂绿泥石是锂的主要载锂矿物，其粒度微细，与高岭石、石英、方解石和黄铁矿嵌布紧密，呈复杂连生关系。本研究为贵州平桥地区锂的富集机制和找矿方向提供了重要地质依据，对该地区蚀变泥灰岩型锂矿的选冶试验具有重要意义。 |
| 中文关键词:赋存状态 锂绿泥石 含锂岩石 蚀变泥灰岩型 平桥地区 贵州 |
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| Characteristics of lithium-bearing rocks and occurrence states of lithium in the Pingqiao area of Guizhou Province |
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| Abstract:This work aims to determine the characteristics of lithium rocks and lithium occurrence in the Pingqiao area of Liuzhi in Guizhou Province. Comprehensive samples from the lithium alteration belt were collected from the drillhole LZK201 in the Pingqiao area, and the average Li2O content was 0.60%. X powder crystal diffraction, scanning electron spectroscopy, spectral analysis, and MLA detection were conducted to determine the lithium rock features, chemical composition, mineral composition, textures and structures of raw ores, and the lithium occurrence states. Results show that the lithium rocks in the study area occurred in the strong silicified breccia zone and weak silicified chloritization alteration zone at the top of the Carboniferous-Permian Nandan Formation. This alteration zone was a set of strongly silicified limestone breccia, chloritization marl and silicified calcareous clay rock. The ore minerals were dominated by lithium chlorite (22.02%), kaolinite (18.30%), calcite (25.27%), quartz (24.25%), and pyrite (5.05%). The ores display altered residual texture, microgranular texture, and strip-layer structure and undirectional block structure. The genetic type of the ores is "altered marl type". Lithium chlorite is the main lithium mineral, and is fine-grained and closely embedded with kaolinite, quartz, calcite and pyrite, displaying a complex intergrowth relationship. This study provides important geological basis for the enrichment mechanism and prospecting direction of lithium in the Pingqiao area of Guizhou, and is also of great significance for the beneficiation and metallurgical experiments of altered mudstone type lithium deposits in the area. |
| keywords:occurrence state, lithium chlorite, lithium rock, altered marl type, Pingqiao area, Guizhou Province |
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