子长–延川矿权区晚三叠世聚煤环境及聚煤规律

Late Triassic coal-forming environment and coal-accumulating law in Zichang–Yanchuan mining area

为科学评价矿权区煤炭资源潜力,促进资源的合理勘探和综合开发利用,以沉积地质学、煤田地质学、构造地质学理论为指导,应用煤田地质勘探、地球物理测井等方法,在深入系统地调研矿权区煤田地质勘探开发现状的基础上,通过分析子长–延川矿权区晚三叠世煤层分布规律、聚煤环境及聚煤规律,认为矿区内三叠系延长组五段煤层沉积体系为辫状河三角洲、滨–浅湖泊沉积组合,煤层形成的主要控制因素为古构造和古气候条件。

In order to improve the resource utilization efficiency and carry on comprehensive development,the resourcepotential of coal in Zichang–Yanchuan mining area is necessary to be evaluated properly. Based on theories of sedimentary,coal geology and tectonic geology and current coal development situation survey results,the distribution pattern ofcoal-bearing formation of Late Triassic coal forming environment was studied using coal geologic exploration methodsand well logging. It is concluded that the coal formed in T3y5 was deposited in braided river delta,lakeshore and shallowlake. The conditions of paleo-structure and paleo-climate controlled the formation of coal.