Abstract:The Linhe rift and Langshan uplift, located in the western section of the Hetao rift system, are important parts of both the Ordos rift system and the Yinshan orogenic belt. The crustal structure in this region is of great importance for unraveling the geodynamic processes responsible for the formation of both the Hetao rift system and the Yinshan orogenic belt. However, aspects of this crustal structure, such as the crustal thickness of the Linhe rift, remain a subject of debate. This study analyzes teleseismic waveforms from 118 broadband seismic stations deployed across the western Hetao rift and adjacent areas. P- wave receiver functions are calculated to obtain information about the crustal structure. Time delays of the sediment- converted Ps phase are employed to determine the thickness of Cenozoic and overlying sedimentary layers. Our results indicate an average sedimentary thickness of approximately 5. 3 km in the Linhe rift, compared to about 2. 7 km in the Chagandelesu rift. H- κ stacking reveals a relatively low crustal VP/VS ratio of 1. 75, suggesting a predominantly felsic composition in the crust northwest of the Langshan piedmont fault. Besides, crustal thickness obtained from H- κ stacking is consistent with Moho depths derived from CCP stacking, showing a deeper Moho beneath the Langshan uplift and a shallower one on the northwest side. Combined with the relatively low VP/VS ratio beneath the Langshan uplift, it is inferred that the uplift is primarily caused by upper crustal thickening under north- south compression. In contrast to previous findings, this study identifies a slight Moho uplift beneath the Linhe rift, suggesting crustal thinning occurred under extensional conditions and may be influenced by mantle upwelling. These new insights constrain the formation mechanisms of the Hetao rift system and the Yinshan orogenic belt.