Fig. 3

Tectonic divisions of the northern Qaidam Basin and location of the study area. a Location of the northern Qaidam Basin, NW China; b Tectonic divisions of the northern Qaidam Basin (modified from Dai et al. 2003); Saishiteng area is located to the north of Saishiteng depression; c Position of well logs and boreholes in Saishiteng area (boreholes discussed in the following text are numbered)