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中生界侏罗-白垩系在西昆仑山北缘大量出露,但是山前覆盖区钻井揭示其分布较为有限且不连续.通过大量野外地质调查,厘定了西昆仑山前侏罗-白垩系与上、下地层的接触关系,认为研究区的侏罗-白垩系与下伏地层为角度不整合接触,与上覆新生代为平行不整合接触,内部为整合或平行不整合接触,与邻区有明显的区别.确定了侏罗-白垩系在地球物理资料中的识别标准,并通过大量的地球物理和钻井资料的标定、解释,圈定了侏罗-白垩系的分布范围,总结了其厚度变化趋势;认为三叠纪末挤压变形残留的古地形对侏罗-白垩系的分布起到了控制作用,新近纪以来的挤压变形则对侏罗-白垩系的分布起到改造作用.研究成果对解剖西昆仑山前的中、新生代的演化历史,指导该地区的油气勘探具有重要参考价值.
The Jurassic-Cretaceous Mesozoic Jurassic-Cretaceous was exposed abundantly in the northern margin of the western Kunlun Mountains, but the drilling in the piedmont area revealed that the Jurassic-Cretaceous strata were relatively limited and discontinuous.Based on a large number of field geological surveys, the Jurassic-Cretaceous Upper and lower strata. It is considered that the Jurassic-Cretaceous and the underlying strata in the study area are in angular unconformity contact, are in parallel and unconformable contact with the overlying Cenozoic, and are internally or partially unconformityly in contact with each other in the adjacent area Obvious difference.Determining Jurasso-Cretaceous identification standard in geophysical data, and through a large number of geophysical and drilling data calibration, interpretation, delineation of the Jurassic-Cretaceous distribution range, summed up the thickness of the change It is believed that the paleogeomorphology at the end of the Triassic crust played a controlling role in the distribution of the Jurassic Cretaceous and that the crustal deformation caused by the Neogene has played a transforming role in the distribution of the Jurassic Cretaceous. It has important reference value for dissecting the evolution history of Mesozoic and Cenozoic in front of West Kunlun Mountains and guiding oil and gas exploration in this area.