摘要
通过对棋盘井井田沉积构造、连井剖面分析,结果显示研究区含煤地层沉积环境主要为复合障壁海岸沉积体系和曲流河、三角洲沉积体系,可识别出障壁岛、潮坪、三角洲平原、曲流河、泛滥平原等多种沉积亚相和沉积单元。研究区石炭系—二叠系沉积期发育由海向陆过渡的海陆交互相大型浅水三角洲沉积,其间发育的分流间沼泽和泥炭沼泽是成煤的主要场所。研究区含煤岩系划分为三个三级层序,由障壁岛潮坪沉积向上下三角洲平原演化,进而过渡为曲流河、泛滥平原沉积。
Based on the analysis of sedimentary structure and profile analysis of connecting wells in Qipanjing mine field,the sedimentary environment of coal-bearing strata in the study area is mainly composed of composite barrier coastal depositional system,meandering river and delta depositional system,many sedimentary subfacies and units such as barrier island,tidal flat,delta plain,meandering river and flood plain can be identified.During the sedimentary period of permo-carboniferous system,the large-scale shallow-water delta deposits developed from sea to land,and the interdistributary bogs and peat bogs developed during this period are the main sites for coal formation.The coal-bearing strata in the study area are divided into three third-order sequences,which evolved from barrier island tidal flat to upper and lower delta plain,and then transitted to meandering rivers,flood plain deposition.
作者
赵鲁阳
张玉洁
孔庆虎
来永伟
Zhao Luyang;Zhang Yujie;Kong Qinghu;Lai Yongwei(The First Exploration Bureau,CNACG,Handan,Hebei 056004)
出处
《中国煤炭地质》
2022年第S02期7-10,21,共5页
Coal Geology of China
基金
中国煤炭地质总局第一勘探局科研项目(ZMYJKJ-2021-04)。
关键词
层序地层
沉积演化
棋盘井井田
sequence stratigraphy
sedimentary evolution
Qipanjing mine field
