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柴达木盆地西部狮子沟一带新生代沉积岩磁组构分析结果显示,岩石磁组构具有磁面理发育、磁线理不发育、磁化率量值椭球呈压扁状的特点;磁化率各向异性度P值不大,反映总体构造变形相对较弱。岩石磁组构反映的应力状态总体为以NE向挤压为主,与轴向NW的背斜构造发育相一致。该区岩石磁组构大多具有原始沉积磁组构特征,磁面理产状大体上反映沉积岩层的层理,同时也记录了受NE向挤压作用的痕迹。根据岩石磁组构与地层层理之间的关系分析,柴西地区两翼不对称的狮子沟背斜具有断展褶皱性质,其形成与下部的花土沟逆冲断层向南西方向的仰冲有关。
The analysis of the magnetic fabric of the Cenozoic sedimentary rocks in the Shizigou area, western Qaidam Basin, shows that the magnetic fabric of the rocks has the characteristics of the development of magnetoplasm, the undeveloped magnetosphere and the flattening of the ellipsoid of the susceptibility. The magnetic susceptibility P value of the anisotropy is not large, reflecting the relatively weak overall structural deformation. The stress state reflected by rock magnetic fabric is generally dominated by NE extrusion, consistent with the development of the anticline in the axial NW. Most of the rock magnetic structures in this area have the characteristics of the original sedimentary magnetic fabrications. The magnetic occurrences generally reflect the stratification of sedimentary strata and the traces of NE-directed extrusion. According to the analysis of the relationship between rock magnetic fabric and stratigraphic stratigraphy, the asymmetrical Shizigou anticline on both wings of Qaixi area has the characteristics of fault-folding, and its formation is related to the overturning to the southwest of the Huatuogou thrust fault in the lower part .