摘要
结合伊犁盆地北缘界梁子井田地质工作成果,分析了区域煤层分布特征及煤质特征,并利用煤质分析结果中的煤岩、灰分、硫分数据,对盆地沉积环境进行了详细探讨。结果表明:(1)界梁子井田各煤层的聚集场所距物源区较远;(2)八道湾组下段盆地基底出现持续、缓慢、高频振幅的沉降作用,八道湾组上段属水进退积的湖扩环境,不利于泥炭堆积;(3)三工河组整体属于湖泛时期,水位较高,可容纳空间的增长速度远大于泥炭的堆积速度,不利于泥炭堆积;(4)西山窑组前期沉积环境极不稳定,可容纳空间增长速度、基底沉降速度忽快忽慢,不利于煤层的形成,仅在后期基底沉降速率相对稳定,且与泥炭堆积速度相当,形成了M#2、M#3厚煤层。上述分析对于区内进一步开展煤炭资源生产探矿工作有一定的参考价值。
Combing with the geological working results of Jieliangzi coalfield in the northern margin of Lili basin, the distribution characteristics of the coal seam and the characteristics of coal quality are dis- cussed, based on the analysis results of coal quality related to coal rock, ash content and sulfur content, the sedimentary environment of Lili basin is analyzed. The study results show that： （~the accumulation place of the coal seams of Jieliangzi coal field are far away from material source regions ; （1）the sedimenta- tion action with the characteristics of continuous, tardiness and high-frequency amplitude is existed in the basement of the basin of the lower section of Badaowan formation, the upper section of Badaowan forma- tion is belongs to lake expansion environment, which is not conducive to peat accumulation;（2）as a whole, the Sangonghe formation is belongs to lake flood period, the water level is high, the growth rate of accom- modate space is greater than the accumulate rate of peat, which is not conducive to peat accumulation;（3） the early sedimentation environment of Xishanyao formation is extremely unstable, the growth rate of ac- commodate space and subsidence rate of the basement of Xishanyao formation are unstable, which is not conducive to the formation of coal seams, only in the late, the subsidence rate of the basement of Xishan- yao formation is stable relatively and it is equivalent to the accumulation rate, so the M2#, M3# thick coal seams are formed. The above analysis related to the characteristics of coal quality and sedimentation envi- ronment of Jieliangzi coalfield can provide some reference for the further prospecting and production of the coal resources in Lili basin.
作者
李书海
成建军
Li Shuhai Cheng Jianjun(No. 216 Geological Party,China National Nuclear Corporation)
出处
《现代矿业》
CAS
2017年第2期4-8,共5页
Modern Mining
关键词
煤质特征
沉积环境
八道湾组
三工河组
西山窑组
Characteristics of coal quality, Sedimentary environment, Badaowan formation,Sangonghe formation, Xishanyao formation
