甘肃省环县甜水堡井田延安组含煤地层沉积环境分析

Sedimentary environment analysis of Yan′an Formation coal-bearing strata in Tianshuibao Mine Field,Huanxian County,Gansu Province

通过收集、整理甜水堡井田钻孔资料数据和测井成果并进行资料分析,运用沉积学、煤田地质学的基本理论和方法,分析了甜水堡井田延安组含煤地层的分布特征、岩石类型及组合特征和沉积环境。研究得出,印支运动晚期形成的古地貌及同沉积构造持续对延安组的沉积有着明显的控制作用。

Through collecting,sorting out and analyzing the borehole data and well logging result in Tianshuibao Minefield,and applying the basic theories and methods of sedimentology and coalfield geology,the distribution characteristics,rock types,combination characteristics and sedimentary environment of Yan′an Formation coal-bearing strata in Tianshuibao Mine Field were analyzed.It was concluded that the paleogeomorphology and synsedimentary structure formed in the late Indosinian movement have an obvious controlling effect on deposition of Yan′an formation.