伊犁河流域地质构造及其地形地貌特点的研究

伊犁河流域是中亚干旱区的湿岛和生物多样性中心,其构造地质基础及现代地貌发育特点孕育了独具特色的自然生态单元。利用实地考察、专题调研和统计分析成果,归纳出伊犁河流域是在上古生代天山兴蒙古海槽基础上．经加里东、华力西运动的褶皱隆起和新构造运动的断块升降作用开始发育现代地貌,北西西与北东东两组构造奠定了楔形地形轮廓的基础,断块分异运动形成了“三山夹两谷”的地貌格局,四山夹二三谷一盆及一开阔平原的地貌格局与高度变化导致明显的水热条件差异。

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.