东明凹陷是华北拗陷区南端的一个新生代沉积盆地,呈北北东向,北窄南宽,面积5000平方公里。凹陷为一早第三纪发育的地堑型断陷盆地。东侧以聊兰断层为界,西侧以长垣断层为界,北与临清地区的等县凹陷毗连,南隔胙城—兰考凸起与中牟凹陷时有相通。具有东部次凹带、西部次凹带、中央隆起带的“两凹一隆”构造格局。中原油田即位于凹陷的北部。 Dongming Depression is a Cenozoic sedimentary basin at the southern tip of North China depression. It is north-north-eastward and north-south-south wide with an area of ​​5,000 square kilometers. The depression was a graben-type faulted basin developed early in the Tertiary. The eastern side of the Liaolan fault is bounded by the west side of the Changyuan fault and the north adjacent to the Xianxian depression in the Linqing area and the southern barrier of Tancheng-Lankao uplift and the Zhongmu Sag. With the eastern sub-concave zone, the western sub-concave zone, the central uplift zone “two concave-one” structural pattern. Zhongyuan Oilfield is located in the northern depression.