河曲—保德矿区煤系高岭岩矿床特征与利用方向

Coal Measures Kaolinite Deposit Characteristics and Utilization in Hequ-Baode Mining Area

河曲—保德矿区含煤地层中高岭岩资源丰富,分别赋存于太原组顶部和山西组中部,其类型以隐晶质高岭岩为主,少量为细—粗晶质及烧变高岭岩。根据大量样品试测结果,其SiO2/Al2O3摩尔比值在2.0左右,说明本区高岭岩纯度高。分析其成因属沉积型煤系高岭岩矿床,其成矿母质类型有两种,一是陆地搬运高岭岩母质多为粘土矿物,运移至静水沼泽环境中沉积,在有机质酸的作用下形成较纯的高岭岩层;二是成矿母质为火山碎屑物质,在酸性沼泽环境下经成岩作用形成。区内高岭岩质地优良,具有广泛的利用前景,为发展煤矿循环经济提供了依据。

The Hequ-Baode mining area possesses abundant kaolinite resources in coal-bearing strata and respectively hosted in top of Taiyuan Formation and middle Shanxi Formation, mainly cryptocrystalline kaolinite and measly fine and coarse crystalline burnt kaolinite. Based on testing results of large quantity samples, their SIO2/Al2O3 mol ratios are about 2.0, showing high purity of kaolinite. It belongs to depositional coal measures kaolinite deposit. They have two kinds of ore-forming mother materials, one is mainly clay minerals kaolinite mother material, was land transported to still water swamp environment and deposited, under organic acid actions formed rather pure kaolinite strata; another is pyroclastic ore-forming mother material under acidic swamp environment, after ore-forming process then kaolinite was formed. Kaolinite in the area has excellent quality and wide utilization prospect, thus provided a basis to develop coalmine recycling economy.