摘要
运用光学显微镜等煤岩学研究方法对新疆库车俄霍布拉克煤矿S_(1)、S_(3)、S_(4)和S_(5)4个钻孔揭露的下_(1)煤层的显微组分进行了详细研究。结果显示,在4个下_(1)煤层样品(S_(1)-1、S_(3)-1、S_(4)-1、S_(5)-1)中都含有藻类体;在S_(1)-1样品的煤砖光片中,一些煤粒显示藻类体密集分布,成层堆积,形成藻煤夹层,水平纹理明显,根据这些藻煤颗粒的粒径推断藻煤夹层的厚度大于2cm,S_(1)-1样品中的藻类体个体较小,在蓝光激发下发黄绿色荧光,显示蜂窝状结构;在S_(3)-1、S_(4)-1和S_(5)-1共3个样品的煤砖光片中,藻类体个体较大,常散布在基质镜质体中或与其他组分共生,在蓝光激发下发黄绿色、黄色荧光,显示蜂窝状结构。下_(1)煤层中出现分散的和聚集的结构藻类体,指示该煤层形成于潮湿的成煤泥炭沼泽环境;S_(1)钻孔中的下_(1)煤层含藻煤夹层,反映成煤时该区域沼泽覆水较深,存在开阔的深水池塘或富水的泥炭洼地,开阔水体中或富水泥炭中长期生长着藻类等低等生物。
Using optical microscopic etc coal petrology research means have carried out detailed study on coal macerals in coal L_(1) intersected by 4 boreholes S_(1),S_(3),S_(4) and S_(5) in the Oho Bulag coalmine,Kuqa,Xinjiang.The result has shown that in 4 coal L_(1) samples(S_(1)-1,S_(3)-1,S_(4)-1 and S_(5)-1)all contain alginite.In the coal brick polished section of sample S_(1)-1,some coal grains shown intensively distributed alginite layered accumulation and formed boghead coal partings with obvious horizontal lamination.According to these boghead coal grain size inferred boghead coal parting thickness>2cm,alginite individual in sample S_(1)-1 is smaller,under the blue light excitation emitting yellowish green fluorescent light shown alveola texture.In the coal brick polished section of another 3 samples,alginite individual is greater,often scattered in matrix vitrinite or coexisting with other components,under the blue light excitation emitting yellowish green,yellow fluorescent light shown alveola texture.In coal L_(1) occurs dispersive and collective telalginite indicated the coal was formed under humid coal-forming peat bog environment.Coal L_(1) boghead coal partings in borehole S_(1) reflecting the area had been covered by deeper bog water during the coal-forming,existed open deep pond or water rich peat low-lying land,in open water or water rich peat grown algae etc lower organisms for a long time.
作者
姜华
徐晓琴
张永义
刘晶晶
贾荣坤
吴凡
Jiang Hua;Xu Xiaoqin;Zhang Yongyi;Liu Jingjing;Jia Rongkun;Wu Fan(Jiangsu Design Institute of Geology for Mineral Resources,Xuzhou,Jiangsu 221006;Xuzhou Changcheng Foundation Engineering Co.Ltd.,Xuzhou Mining Group,Xuzhou,Jiangsu 221006;International Research Center for Coal Geology,CUMT.Xuzhou,Jiangsu 221008;Xinjiang Coal Sciences Research Institute,Urumqi,Xinjiang 830000)
出处
《中国煤炭地质》
2022年第2期29-33,42,共6页
Coal Geology of China
基金
中国煤炭地质总局科技创新项目“中国中生代煤的煤岩学、孢粉学和地球化学研究”(ZMKJ-2020-J01-3)。
