湖北省湿地演化的地质地貌背景

The Geological and Geomorphological Background of the Wetlands Evolution in Hubei Province

湖北经历过几次重要的海陆变迁和造山运动后,到晚第三纪时,逐渐形成了近代地貌的雏形.其后的新构造运动不仅控制着湖北现代地貌的基本格局,而且奠定了湖北湿地演化的地质地貌基础.主要表现为:新构造运动在湖北省境通过断块差异的升降运动、掀斜运动和坳折沉降运动几种运动类型,不仅控制着湖泊湿地的形成与兴衰、河流湿地的变迁,而且为亚高山湿地和库塘湿地的形成创造了地质条件.

After undergoing several important sea-land changes and orogenic movements, till the period of Neogen, the prototype of the. modern landscape of Hubei province had been gradually formed, then, the following Neo-tectonics movement not only controlled the basic structure of modern landscape, but also laid the foundation of its geological features for wetlands evolution in area of Hubei. The main effects are： By and through several types of the movements such as vertical-displacement movement, down-tilting movement and bend-break subsidence movement which are caused by the differentials between fault blocks. The Neo-tectonic movement not only controlled the formation of lake wetlands and its rise and fall as well as the variation to river wetlands, but also created geological conditions for the formation of Subalpine wetlands as well as reservoir and pond wetlands.