论文部分内容阅读
盆地面积130平方公里,为中上元古界及寒武系所环绕。石炭二叠含煤岩系则主要隐伏在盆内中新生界之下,面积约10平方公里。煤系基底为寒武系,石炭系和二叠系下统山西组下段为含煤岩系。山西组含煤三层,其中B_2煤全区可采;煤系盖层缺失山西组上段至朱罗系一套地层。构造以断裂为主,褶皱次之。二叠纪后本区隆起,煤系中上部遭到风化剥蚀,燕山运动早期(朱罗纪时),使全区隆起形成一些小褶皱,小面积的煤系在向斜核部才得以保存。白垩纪时本区又趋于下降,沉积了九店组,喜山期除断裂活动外,沉积了第三系,上陶庄—西岭—任庄向斜是本区初序次的基本护煤构造;盆缘断裂限制煤系赋存的范围;盆内断裂影响煤系赋存深度;大占砂岩具较强的抗风化能力,亦起较大的护煤作用。鉴于上述:寒武系上统箇山组为煤系底板的最高层位,是找矿标志之一,向斜褶皱是煤系存在的基础。此类掩盖式煤田在河南尚属少见,盆地西北已封闭,东南尚有一定远景。
Basin covers an area of 130 square kilometers, surrounded by the Middle and Upper Proterozoic and Cambrian. Carboniferous Permian coal-bearing rocks are mainly hidden beneath the Mesozoic-Cenozoic basin, with an area of about 10 km 2. The coal-based basement is Cambrian, and Carboniferous and Lower Permian Shanxi Formation are coal-bearing rocks. There are three coal layers in Shanxi Formation, of which B_2 coal can be adopted in the whole area; Structure to fracture-based, fold second. After the Permian uplift in this area, the middle and upper coal measures were weathered and eroded. In the early Yanshanian movement (Jura Period), some small folds were formed in the uplift of the whole area, and a small area of coal was preserved in the syncline core. Cretaceous this area has tended to decline, the deposition of nine stores, in addition to fault activity in the Himalayan period, the deposition of the Tertiary, Shangtaozhuang - Xiling - Renzhuang syncline is the initial order of the basic protection zone Coal tectonics. Basin margin ruptures the range of coal-bearing occurrence. The intra-basin fracture affects the depth of coal-bearing rocks. The large sandstone has strong anti-weathering ability and also plays a great role in coal protection. In view of the above: The Cambrian Upper Dangshan Formation is the highest level of the coal measures floor, which is one of the ore-finding signs. The syncline folds are the basis for the existence of coal measures. Such concealed coalfield is still rare in Henan Province, northwestern basin has been closed, there are still some southeast vision.