论文部分内容阅读
本文探讨了豫东地区棋盘格式构造,二叠系下统山西组和上统下石盒子组赋存可采煤层,为本区主要含煤建造三叠—朱罗纪时,豫淮坳陷产生了东西延展的沛县隆起,徐州—宿县坳陷太康—商丘—徐州隆起等纬向构造,降起部位煤系遭到剥蚀,坳陷部位煤系保存较好,白垩—第三纪期间,豫淮坳陷产生上隆。在上白垩纪及其后,由北西西向和北北东向两组断裂,将煤系切割成棋盘格状摆布的块垒和槽地,控制着煤层的埋藏状态和分布规律,一些槽地,在商丘、砀山以南,通常北边翘起,南边下降,以北则相反沉降中心在两组断裂交汇内侧。通过构造分析,对区内找煤前景作出初步估价,在块垒的斜坡地带,是寻找埋深不足1000米煤层的最佳部位,槽地沉降中心部位,可作远景预测区;永城城郊井田西邻两个断块中北部,是寻找埋深三煤层不足1000米,二煤层1000—1200米的可靠地段。
In this paper, we discuss the checkerboard structure in the eastern part of Henan Province. The Permian Xianyangshishi Formation and the Upper Shiheishi Formation can hold the coal seams. When the Triassic-Jurassic coal was mainly constructed in this area, the Yuhuai depression The Peixian uplift extending from east to west, the Taiyuan-Shangqiu-Xuzhou uplift from Xuzhou to Suxian Depression, the coal system of the descending part was denuded and the coal system of the depression was well preserved. During the chalk-Tertiary period, Yu-Huai depression uplift. During and after the Cretaceous, the two series of faults were fractured from northwest to north and from north to east, and the coal measures were cut into block barriers and troughs arranged in a checkerboard pattern to control the burial status and distribution of the coal seams. In some of the troughs, Shangqiu, south of Dangshan, usually the north tilt, the south down, to the north opposite the settlement center in the intersection of the two sets of the medial. According to the tectonic analysis, the prospect of looking for coal in the area is preliminarily evaluated. In the slopes of the block base, it is the best place to find the coal seam less than 1,000 meters deep, and the central part of the settlement of the trough can be used as the prediction area; Adjacent to the two blocks in the north, is to find buried three coal seam less than 1000 meters, two coal seam 1000-1200 meters of the reliable section.