蔚县煤田成煤环境浅析

蔚县煤田含煤沉积范围大约600km^2。储量丰富，是一个具有远景发展的含煤地区。煤层总厚度10m以上的富煤带，主要分布于水峪、崔家寨、陡涧子、黄崖、烟墩坡一带，正是古基底斜坡带的凹陷处。蔚县煤田早中侏罗世含煤沉积，主要由河流或湖滨河口三角洲相、湖泊相、泥沼相组成。其中以湖泊相、沼泽相为主，河流相次之。富煤带和富煤中心主要赋存于三角洲前缘的泥炭沼泽环境中，是富煤沼泽相形成的有利场所。

An Elementary Analysis of Coal-Forming Environment in the Yuxian Coalfield

The Yuxian coalfield has about 600km^2 of coal-bearing area, with abundant coal reserves and is a prospective coal-bearing region. A coal-rich zone with total coal seam thickness of 10m above is distributed in Shuiyu, Cuijiazhai, Doujianzi, Huangya and Yandunpo district, right in a depression on the slope of the paleobasement. The early to middle Jurassic coal-bearing deposition is mainly consisted of fluvial or lakeshore, estuarine delta facies, lacustrine facies and slough facies. Among them the lacustrine and swamp facies are the primary facies, the second is fluvial facies. The coal-rich zone and coal-rich centre are mainly hosted in peat swamp environment on delta front, where is a favourable place to coal-rich swamp facies forming.