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| 基金项目：贵州省地质勘查基金项目（52000021LG5A4W885CRRQ） |
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| 摘要： |
| 为研究贵州盘县大寨地区煤系Ga资源的富集特征，以区内9口钻孔中采集的219件岩芯样品的测试分析数据为基础，运用地球化学及数理统计方法，对区内各煤层及围岩、顶底板、夹矸中Ga的赋存特征进行了详细研究。结果表明，大寨矿区Ga主要富集在煤层顶底板、夹矸中的黏土矿物中，赋存状态以无机结合态类质同象替代为主；底板、夹矸中的Ga含量最高，平均含量分别为37.86、36.42 μg/g；顶板中Ga含量次之，平均含量为29.94 μg/g；煤层中的Ga含量最低，平均含量为8.74 μg/g；龙潭组中下部较上部更为富集，顶板Ga含量平均值最大的为17 2号煤层，底板和夹矸Ga含量平均值最大者为24号煤层，均达到工业品位，表明贵州地区龙潭组煤中Ga具有一定的成矿前景。 |
| 关键词：煤系资源 Ga 地球化学 勘探前景 贵州 |
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| Abstract: |
| To study the enrichment characteristics of gallium resources in coal-bearing strata in Dazhai area, Panxian County, Guizhou Province, based on the testing data of 219 core samples collected from 9 boreholes within the area, the occurrence characteristics of gallium in the coal seam, roof, floor and gangue were studied in details by means of geochemistry and mathematical statistics. Gallium is mainly enriched in the clay minerals in the roof, floor and gangue, and the occurrence state is mainly replaced by the inorganic binding isomorphism. The average content of gallium in the floor and gangue is 37.86 μg/g and 36.42 μg/g, respectively. The average content of Ga in the roof is 29.94 μg/g. The average content of the coal seam is 8.74 μg/g. In addition, gallium in the middle and lower part of Longtan Formation is more enriched than that in the upper part. The average gallium content of No. 17-2 coal is the highest in the roof, and that of No. 24 coal is the highest in the floor and gangue, which have reached the industrial grade. It shows that gallium has certain metallogenic prospect in the coal of Longtan Formation in Guizhou area. |
| Keywords:coal-based resource gallium geochemistry exploration prospect Guizhou |
| 伍远学，陆玉欢，周泽.贵州大寨矿区龙潭组镓的富集特征及勘探前景[J].地质学刊,2024,48(2):149-154 |
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