Studies on the Geological Structures and Characteristic of Terrain and Landform in Yili River Basin

Yili River Basin is the damp island and biological diversity center.Its geologic foundation and present physiognomy characteristic become a special natural eco-cell.By field survey,dissertation investigation and statistical analysis,it concludes that Yili River Basin is based on the Tianshan mountain-Mongolia ancient sea-groove.By the drape-apphysis in time of Kialidong-haixi movement and block ascent-drop effect in the time of the neotectonics,it begins to develop the present landform.Structures of two group in N-WW and NEE establish the foundation of the cuniform landform adumbration,break-block different movement forms the landform pattern of three mountains and two valleys.The landform pattern of four mountain-three basin-one valley-one widen plain and altitude difference together result obviously in the water-heat diversity.