延川南地区含煤地层沉积环境分析

Analysis of Sedimentary Environment of Coal Bearing Strata in Southern Yanchuan

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 a large number of core observation and analysis and summary of the previous data,compares the development characteristics of the upper paleozoic in the southern area of Yanchuan and the main coal seams, and analyzes the main coal bearing strata. It is believed that the 2 sets of coal bearing strata in Shanxi formation and Taiyuan formation in the study area, and the thickness of No. 2coal seam of Shanxi formation is the main coal seam in the research area. Shanxi formation overall transitional environment of shallow lake opposite delta plain facies and Shanxi formation in the lower part of shallow lake- delta front environments is the most favorable coal forming environment.