煤中微量元素富集的主要因素分析

在对兖州矿区中微量元素成因分析及总结前人结论的基础上，将煤中微量元素富集因素划分为原生、次生和后生三个阶段，分别对第一个阶段影响微量元素富集的主要因素进行研究和分析。结果表明，煤在形成的过程中影响微量元素迁移、富集的因素很多，植物生长的种类，生长中水化学条件、泥炭沼泽形成中大气、海水的入侵，煤在煤化过程中岩浆热液的作用、煤与顶、底板岩石的物质交换作用等都影响着煤中微量元素富集，因此，煤中微量元素的形成、聚集是煤在形成的各个时期，各种地质因素综合影响的结果。

Mian Factors controlling concentration of trace element in coal

Based on the genetic analysis of trace elements in the coal of Yanzhou mining district and the summary of previous conclusions,the concentration processes of trace elements are divided into three stages,i.e.primary,secondary and hysterogenic stages.The main factors,which impact on concentration and migration of trace elements,are analyzed.The results indicated that during the coal formation,which began from plants growing to peat swamp and to types of coal rank,there are many factors influencing migration and concentration of trace elements.The factors mainly include plant types,chemical conditions,climate conditions,seawater encroachment,magma hydrothermalism during coalification,and matter exchange between coal and rocks of roof and floor.Therefore,the generation and concentration of trace elements in coals are controlled by many geological factors during every coalification stages.