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一、概况上二迭统龙潭组是湘南的主要含煤建造。煤层发育良好,分布面积广,储量丰富,大力发展本区煤炭工业,对于迅速扭转北煤南运,加快我省工业建设步伐,有着重大意义。龙潭组的岩性主要为碎屑岩、泥岩、炭质泥岩和煤层组成,为一套过渡相～陆相的沉积。根据岩性、岩相、古生物和含煤性,可明显地分为上下两段,上段厚143～435米,下段厚150～432米。含煤数层到二十多层,多集中于上段,下段基本不含煤(仅在个别地区
I. Overview The Longdi Formation in Upper Second Permian is the main coal-bearing construction in southern Hunan. The well-developed coal seam has a wide distribution area and abundant reserves. To develop the coal industry in this area is of great significance for rapidly reversing the north transport of northern coal and accelerating the pace of industrial construction in our province. The lithology of the Longtan Formation is mainly composed of clastic rocks, mudstone, carbonaceous mudstone and coal seams, and is a set of facies-facies sediments. According to lithology, lithofacies, paleontology and coal-containing, can be clearly divided into two sections, the upper section of 143 ~ 435 meters thick, the lower section of 150 ~ 432 meters thick. Coal layer to more than twenty layers, mostly concentrated in the upper section, the lower section of basic coal (only in some areas