| Lower Cretaceous basins associated with the Hohhot detachment in the Daqing Shan of Inner Mongolia, China, allow us to better understand the tectonic evolution of extensional basins formed in association with detachment faulting and metamorphic core complex formation. The six basins are located in different structural setting throughout the metamorphic core complex setting, and are consistent with previously proposed models for supradetachment basin sedimentation, with some second-order variability in sedimentary style. The basins are composed of coarse, predominantly footwall derived, conglomerate deposited by mass-wasting and alluvial fan processes. Paleocurrent direction is generally southerly, indicating transverse transport away from the bounding detachment fault.; This study establishes that the basins described are all of similar geometry and depositional style, and that supradetachment basins of this style may occur in various positions within a detachment-metamorphic core complex setting, regardless of proximity to the exhumed metamorphic core and magnitude of extension. |
