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在前人绘制的图件中,对七角井组的描述不准确且互相有矛盾。本文通过在2010年6月-9月的野外地质路线、实测地质剖面和古生物化石研究的基础上,结合区域岩性对比,将七角井组划分为三段。根据岩石组合特征、沉积特征和古生物化石组合,分析下石炭统地层的沉积特征,确定了七角井组为一套浅海向陆相演化的沉积环境。深入了解区域地质情况,了解三道岭地区石炭系晚海西期的构造运动情况。
In the previous drawings drawn by the predecessors, the descriptions of the Qiaojing well group are inaccurate and mutually contradictory. Based on the field geologic route, the measured geologic profile and paleontology fossils from June to September in 2010, this paper divides the Qiaojing well into three sections based on the contrast of regional lithology. According to the rock assemblage characteristics, sedimentary characteristics and paleontology fossil assemblages, the sedimentary characteristics of the Lower Carboniferous strata are analyzed and the sedimentary environment evolved from a shallow sea to continental facies in the Qijiaojing Formation is determined. In-depth understanding of the regional geological conditions, understand the Sandouling Carboniferous Late Hercynian tectonic movement.