Figure 1

Geological background of northwest China. (a) The satellite image of northwest China, including the Junggar Basin, Tianshan Mountains, and Tarim Basin from Google Earth (map data: Google, Image Landsat/Copernicus) (b) Geological map of the northern Chinese Tianshan Mountains and the southern Junggar Basin (modified from26). The red star indicates the working area, also known as the Anjihaihe section.