关键词: 多因子降维法, 地震与非地震联合方法, 构造建模, 柯东构造带, 西昆仑山前

Abstract: The Kedong structural belt is one of the key areas to reveal the deformation processes of thrust belts in the piedmont of
western Kunlun Mountains, as well as an important target area for petroleum exploration at present. Because of strong structural
deformation, fast change in seismic velocity across strata and complex surface conditions, the present exploration faces problems of
poor-quality seismic data, resulting in multiple interpretations of structural modeling. This work uses R factor dimensionality reduction
method to analyze the inversion of gravity, magnetic and electrical data of Fusha area in the Kedong belt. The results show that there is a
fault block structure beneath Fusha area and seismic image does not show an anticline structure. Meanwhile, together with the seismic
interpretation, we propose that the Fusha fault block structure was a result of an earlier complete anticline reworked by a dextral strike-slip
fault in the Early Pleistocene. The practice of comprehensive modeling in the Kedong structural belt shows that the integrated method of
seismic and non-seismic data can provide a powerful tool to understand the complex deformation processes in a complex thrust belt.

Key words: multifactor dimensionality reduction, integrated method of seismic and non-seismic data, structural modeling, Kedong structural belt, Piedmont of western Kunlun Mountains