Yanqi basin, with an area of 13000 squre kilometer, located in the Bayinguoleng Mongolia autonomy state in Xinjiang, is a Mesozoic-Cenozoic superposed basin superimposed in the Southern Tianshan Hercynian erogenic belts.

• 焉耆盆地位于新疆维吾尔自治区巴音郭楞蒙古自治州境内，是一个上叠在海西期南天山造山带之上的中新生代叠合盆地，面积1.；3×10~4km~2。