鄂尔多斯盆地基底断裂对环境地球化学景观与水土流失的控制作用

Control Action of Basement Fractures on Environment Geochemistry Landscape and Soil Erosion in Ordos Basin

鄂尔多斯盆地的环境地球化学景观与水土流失分布特征与基底断裂关系密切。地基底断裂控制了盆地的环境地球化学景观和元素分布特征,尤其是定边-绥德断裂带和华池-大同断裂带将盆地分成两个截然不同的地球化学、地貌景观区;鄂尔多斯盆地内的基底断裂在某种程度上控制了盆地的地势、地形、地貌、新构造运动、岩石类型、岩性构造、土壤类型及其性质、浅层地下水及其性质,并间接的控制了土壤岩石后期的改造、风与水的动力条件等因素。研究盆地基底断裂与水土流失的关系,用于指导水土流失综合治理具有重要的现实意义。

Basement fractures is closely related with environment geochemistry landscape and distribution feature of soil erosion in Ordos Basin. The basement fractures control environment geochemistry landscape and the features of element distribution, especially the Dingbian--Suide and Huachi- Datong fracture zones divide the Ordos Basin to two completely different landscape section of geochemistry and physiognomy;To a certain extent,the basement fractures control topography, landform, physiognomy, neotectonic movement, rock types, lithology structure, soil types and its properties, shallow groundwater and its characteristic,and indirectly control long-term alteration of rock and soil ,dynamic conditions of wind and water. To study the relationship between basement fractures and soll erosion and guide synthetical treatment of soil erosion have important significance.