黄骅坳陷孔西潜山推覆构造的发现及意义

印支－燕山期的推覆构造在华北地台的北缘、南缘及内部台褶带都已有发现,但在地台东部广大的盆地地区,至今未见有报道。本文通过地震剖面解释、钻孔资料等研究,厘定了黄骅坳陷孔西潜山推覆构造,并分析认为郯庐断裂带的左行剪切运动为其发生、发展的动因模式。这一发现对指导黄骅坳陷及临近盆地基底中进一步的油气勘探具有重要的理论和实践意义。 

THE DISCOVERY AND SIGNIFICANCE OF NAPPE STRUCTURE FORMED IN THE INDO EARLY YANSHAN MOVEMENT IN THE BASEMENT OF HUANGHUA DOWN WARPED BASIN

Nappe structure formed in the Indo early Yanshan movement were found in the north,the south and the inner platform fold belts of the North China platform.But it is not in document so far in the basement of the vast east basin of the platform.Based on the interpretation of seismic sections and the examination of core,the nappe structure form was discerned in the Kongxi buried hill in the Huanghua down warped basin.Typical elements of nappe structure,such as fault slope,fault flat,antithetic thrust,overlap beds,and so on,were found in the buried hill.As to the driving force of the nappe structure,the left slip motion of the Tanlu fault zone during the Indo early Yanshan movement was proposed.The confirmation of the nappe structure in the basement of the Huanghua basin may have implications to the further oil and gas exploration in that area.