新疆准东煤田西黑山勘查区西山窑组煤相特征

以新疆准东煤田西黑山勘查区西山窑组煤层为研究对象,采用成因参数法和煤相图解方法,同时结合沉积学方法进行煤岩、煤相分析,探讨泥炭沼泽类型及其演化规律。煤相参数研究显示,B1、B11、B21和B2煤层煤相总体为偏干燥的湿地森林和湿地森林沼泽,B12、B3和B4-5煤层总体为干燥森林沼泽;垂向上B1、B2、B3、B31和B6煤表现出显著的由湿地森林沼泽或偏干燥的湿地森林沼泽向干燥森林沼泽演化,反映覆水程度逐渐变浅,泥炭沼泽表面逐渐趋于干燥,表明成煤期泥炭堆积速率与基底的相对沉降速率持平或略高于基底沉降速率。

Xishanyao Formation Coal Facies Characteristics in Xiheishan Exploration Area,Eastern Junggar Coalfield,Xinjiang

Taking the Xishanyao Formation coal seams in Xiheishan exploration area, eastern Junggar coalfield, Xinjiang as subject investigated, using genetic parameter method and coal facies graphic method, combined with sedimentological method carried out coal lithology, coal facies analysis, discussed peat bog types and their evolution rules. The study of coal facies parameters has shown that coal facies of coal seams B1, B11, B21 and B2 generally originated from slightly dry wetland and wetland forest bogs, while B 12, B3 and B4- 5 from dry forest bogs. Vertically, B1, B2, B3 and B31 obviously present evolution from wetland forest bog or slightly dry wetland forest bog toward dry forest bog. That reflected water covering gradually shallower, peat bog surface gradually dryer, thus illustrated coal forming period peat accumulation rate kept balance or slightly higher than basement subsiding rate.