云南文山丘北地区上二叠统含煤地层特征

在分析以往地质资料的基础上，通过煤田地质填图、实测剖面测量、槽探等勘查手段，对文山丘北地区地层及构造特征进行分析。区内构造从属于文山巨型旋钮构造，主要发育庄科一密纳复式背斜及尼尼白一笼陶向斜，上二叠统为主要含煤地层，由于沉积环境的差异，在调查区西南部发育龙潭组，其他大部分地区为吴家坪组，龙潭组为主要含煤地层，煤层厚度较小，厚度变化较大，为高灰、高硫、低热值的贫煤。

Upper Permian Coal-bearing Strata Characteristics in Qiubei Area,Wenshan, Yunnan

Based on previous geological data analysis, through exploration means of coal geological mapping, geological section measur- ing, trenching etc., analyzed strata and structural features in the Qiubei area, Wenshan. Structures in the area are subject to the Wen- shan mega knob structure, mainly developed Zhuangke-Mina composite anticline and Ninibai-Longtao syncline. Upper Permian Series is main coal-bearing strata; the Longtan Formation has developed in southwestern part of the area, while most other area developed the Wujiaping Formation because of different sedimentary environments. The Longtan Formation is main coal-bearing strata; coal thick- ness is rather small and variable belongs to high ash, high sulfur and low calorific meager coal.