Occurrence and Hydrochemical Characteristics of Saline and Salty Springs in the Sichuan Basin of China

Figure 1

Simplified geological map of the Sichuan Basin (modified from the National Geological Map Database). 1: Quaternary sand and gravel; 2: Tertiary glutenite; 3: Cretaceous glutenite and mudstone; 4: Upper Jurassic sandstone and mudstone; 5: Middle and Lower Jurassic sandstone and mudstone; 6: sandstone and mudstone of the Upper Triassic Xujiahe Group; 7: carbonate of the Lower Triassic Jialingjiang Group and Middle Triassic Leikoupo Group; 8: Permian shale, killas, and tuff; 9: Siluria shale, killas, and mudstone; 10: Cambrian limestone and dolomite; 11: Neoproterozoic carbonate; 12: fault; 13: city.