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在观察大量岩芯、分析总结前人资料的基础上,对延川南地区上古生界,主要煤层发育特征进行对比,并对主要含煤地层进行沉积环境分析。认为在研究区发育山西组和太原组2套含煤地层,其中山西组的2~#煤层厚度大,全区广泛发育,是研究区的主要煤层。山西组总体为浅湖相向三角洲平原相的过渡环境,山西组下部浅湖-三角洲前缘环境是最有利的成煤环境。
Based on the observation of a large number of cores and the analysis of previous data, the developmental characteristics of Upper Paleozoic and major coal seams in Yanchuannan area are compared and the depositional environments of the major coal-bearing strata are analyzed. It is considered that there are two sets of coal-bearing strata in Shanxi and Taiyuan formations in the study area. Among them, the thickness of coal seam 2 ~ # in Shanxi Formation is large and the whole area is widely developed, which is the main coal seam in the study area. The Shanxi Formation is generally the transitional environment of shallow lacustrine to delta plain facies, and the shallow lacustrine delta frontal environment in the lower part of Shanxi Formation is the most favorable coal-forming environment.