鄂尔多斯盆地东缘“翘板”支点影响下的含煤地层发育特征

通过沉积演化史分析、煤田构造发育规律研究、煤岩物理化学特征分析等手段解剖了鄂尔多斯盆地东缘含煤地层沉积差异。临兴地区受北纬38°构造带的影响，在盆地东缘的南北升降变化过程中起“翘板”支点作用。盆地东缘的含煤地层在该构造带上有明显的厚度变化，太原组的煤层、灰岩层、砂岩层在剖面上呈现分叉、尖灭等特征。通过对临兴地区断层发育情况、地层沉积特征的精细解剖，进一步验证了该构造支点的存在及其对含煤地层沉积演化的影响。随着鄂尔多斯盆地东缘更多的地区进行非常规天然气勘探开发，详细解剖了该“翘板”支点影响下的沉积差异。

Characterization of coal bearing strata under influence of "seesaw" fulcrum in east margin of Ordos Basin

Based on analysis of basin sedimentary evolution，structural development pattern of coal field and coal chemistry characteristic，the paper made clear of the regional sedimentary difference in east margin of Ordos Basin.Linxing aera was influenced by 38°N structural belt，and played the role of “seesaw” fulcrum during the movement of the whole basin.Coal bearing strata illustrate obvious sedimentary difference in eastern Ordos Basin，especially the coal seams，limestone strata and sandstone strata in Taiyuan Formation，of which the thick seam of sand body distributed mostly in the north of Linxing aera，limestone mostly located in the south，coal seam splits into two seams when threading Linxing aera.This paper analysed the Linxing aera in detail through tectonic and sedimentary characteristic research，which further verified the existence of “seesaw”.As with more and more areas being taken into unconventional gas development in eastern Ordos Basin.