为探究柴达木盆地浅部形变的深部动力响应机制，文章在布格重力异常资料的基础上，以深地震剖面、天然地震层析成像等资料为控制点，逐步求得最佳基准面，反演了莫霍面的空间展布形态。结果显示，响应于浅部构造形变的空间变化，柴达木盆地莫霍面深度东、西部差异性同样显著。盆地西部浅部形变较强，广泛发育逆冲缩短构造，莫霍面相对较深，约55~61 km。盆地东部整体形变较弱，主要集中于盆地边缘，莫霍面则相对较浅，约48~61 km。除此之外，东昆仑山与柴达木盆地东部之间还存在一个巨大的陡阶带，莫霍面突变幅度可达15 km左右。以上特征表明，在青藏高原NE向扩展的构造背景下，柴达木盆地西部地壳缩短显著，并逐渐增厚，东部则仍保持了与稳定克拉通盆地相似的特征，地壳厚度变化微弱。阿尔金断裂带深切走滑引发的壳幔混合作用，可能是促进柴达木盆地西部缩短增厚，进而导致莫霍面东、西部空间差异的决定性因素。

To investigate the deep dynamic causal mechanism of shallow deformation in the Qaidam Basin, this study utilized Bouguer gravity anomaly data with the deep seismic profiles and natural seismic tomography data as control points to obtain the best datum plane, and invert the spatial distribution morphology of the Moho surface. The results show that the spatial variations of shallow tectonic deformation also manifest significant differences in the Moho depth between the eastern and western parts of the Qaidam Basin. In the western part of the basin, shallow tectonic deformation is stronger with extensive development of thrust and shortening structures. The Moho surface is relatively deep, approximately 55-61 km. In contrast, the eastern part of the basin exhibits weaker deformation overall, mainly concentrated at the basin margins with the Moho surface being relatively shallow, approximately 48-61 km. Additionally, there is a large steep zone between the East Kunlun Mountains and the eastern Qaidam Basin, where the Moho surface can abruptly change by about 15 km. These features indicate that under the tectonic background of the northeastward extension of the Tibetan Plateau, the crust in the western Qaidam Basin has undergone significant shortening and thickening, while the eastern part still retains characteristics similar to a stable craton basin, with minimal changes in crustal thickness. The deep-cut strike-slip faulting of the Altyn Tagh Fault zone, which induces crust-mantle mixing, is likely a decisive factor leading to the shortening and thickening of the western Qaidam Basin, thereby resulting in the spatial differences in the Moho surface between the eastern and western parts.