论文部分内容阅读
本文根据1:20万区域地质资料结合笔者多年在龙门山,大巴山地区的实地观察,将本区晚二迭世煤田划分为三种煤田(产煤地)的成煤类型:1.滨海冲积平原型:分布于安县太平天台山—桑枣,金溪沟—花板沟—北川县三星,广元县月坝—罗家坝等地。它和川滇东侧相视,邻近古陆含煤建造为粗碎屑沉积,氧化环境占优势,常见煤层遭受冲蚀,浪击的现象的地段呈现薄煤层和煤线。2.滨海平原—拗陷平原型:分布绵竹红岩,天池、睢水等地含煤岩系总厚为166—117
Based on 1: 200,000 regional geological data and field observations of Longmen Mountain and Dabashan Mountain for many years, this paper divides the Late Second Diego coalfield into three types of coal-forming coalfields (coal-producing land): 1. Alluvial sea Plain type: distributed in Taiping County Taiping - Sang date, Jinxi ditch - Huabandou - Beichuan County Samsung, Guangyuan moon dam - Luojiaba and other places. It is located in the east of Sichuan-Yunnan and adjacent to the ancient coal-bearing coal deposits for the formation of coarse clastic sediments, the dominant oxide environment, the common erosion suffered by the coal seam, the phenomenon of the phenomenon of waves show the thin seam and coal lines. 2. Coastal plain - depression plain: Distribution Mianzhu Hongyan, Tianchi, Lishui and other places containing coal rock thickness of 166-117