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我们已经调查了中国西南部晚二叠世煤田中的夹矸的分布范围和地层分布,其面积超过几十万平方公里。我们研究了夹矸分布与沉积环境之间的关系。在矿物和岩石学数据基础上,我们确定这些夹矸来源于空中散落下来的火山灰,随着聚集在泥炭沼泽中,在酸性条件下,原先为玻璃质和石质的组分发生交替作用,导致高岭石的形成。 在岩石的、矿物的和化学的分析数据基础上,我们判定对夹矸矿物和地球化学指标的应用,可能对有关煤层方面和预测煤质及恢复有关的古沉积环境是有用的。
We have investigated the distribution and stratigraphic distribution of gangue in the Late Permian coal fields in southwest China, with an area of more than a few hundred thousand square kilometers. We studied the relationship between the distribution of the gangue and the sedimentary environment. Based on the mineralogical and petrological data, we determined that these gangues originated from pozzolan scattered in the air and, when aggregated in the peat swamp, under acidic conditions, the original glassy and stony components alternated, resulting in Formation of kaolinite. Based on rock, mineral and chemical analysis data, we determine that the application of petrological and geochemical indicators may be useful in relation to coal seams and paleo-sedimentary environments related to the prediction of coal quality and recovery.