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本文讨论的桂中地区,包括广西境内宜山、柳州、柳城、鹿寨以南,南丹月里、贤安、上林以东,黎塘以北,樟木以西的广大地区,面积约4万平方公里,位于广西山字形盾地之内。这一地区广泛发育着晚二迭世合山组煤系地层,是广西最有价值的含煤建造,其中最大的合山煤田,分布在研究区的西部。合山组含煤建造不同于一般的陆相,也不同于一般的海陆交互相含煤建造,它是滨海潮间为主的海相含煤建造。以马滩剖面为例,180米的总厚度中,
The areas discussed in this paper include the vast areas of Guangxi, Guangxi, Yishan, Liuzhou, Liucheng, south of Luzhai, Nandan, Xian’an, east of Shanglin, north of LiTang and west of Zhangmu. The area is about 40,000 square Km, located in Guangxi Shaped Shield within. The coal seam strata of the Hushan Formation in the Late Permian are widely developed in this area and are the most valuable coal-bearing constructions in Guangxi. The Heshan coalfield, the largest of them, is located in the western part of the study area. Heshan Formation coal-bearing construction is different from the general continental, but also different from the general sea-land interaction phase coal-bearing construction, which is mainly coastal marine intertidal coal-bearing construction. To Ma Tan profile, for example, the total thickness of 180 meters,