昭苏盆地含煤地层沉积环境及聚煤规律研究

摘要

综合分析昭苏盆地地质调查、钻孔及测井资料，采用沉积学及沉积相分析方法，对其沉积环境及聚煤规律进行研究。结果表明，昭苏盆地含煤地层具典型泥-砂(砾)-泥（煤）结构，为近物源山间内陆湖相沉积环境。沉积体系主要发育冲积扇、扇三角洲、辫状河和三角洲沉积。煤层主要发育于下—中侏罗统八道湾组和西山窑组中，煤层层数、厚度和垂向分布具一定差异，形成受盆地构造和沉积演化及物源碎屑供给控制。%Based on the theories of the sedimentology and sedimentary facies,this article comprehensive analysis the in-formation from the geology surveys,drilling cores and well logs of Zhaosu basin,Xinjiang.The sedimentary environment and coal accumulation is studied.The rusults show that the coal-bearing formation has a typical structure with mud and sand (gravel)- mud (coal) in the mountains nearly source inland lake facies sedimentary environment.The alluvial fan,fan delta,braided river and delta sedimentary system are developed.The Coal-bearing formations are mainil composed of Badaowa formation and Xinshanyao formation of Middle-Lower Jurassic.The number of layers,thickness and the verti-cal distribution are difference.The formation of coal is controled by the basin tectonic and sedimentary evolution and source clastic supply.