西藏札达土林地貌形成条件及演化过程

Forming Condition and Evolution Process of Earth Forest Landform in Zanda of Tibet

札达土林形态丰富多姿,沿象泉河两岸成群展布。所处盆地中心札达群地层厚度大,向两侧变薄,则两侧土林高度不同,边缘区土林较低。区域气候条件、地质构造条件、地形条件、物质条件是形成该地土林的主要因素,并受半固结土体堆积厚度、水系密度与切割深度制约。在干旱气候条件下,半固结状态的具有水平层理的沉积地层通过地质构造作用持续抬升,经受强烈物理风化和暴雨冲刷及水系剧烈切割而形成。札达土林地貌具有较高的科学研究价值、美学观赏价值、旅游经济价值,研究札达土林地貌形成条件及演化过程可为该地地质遗迹保护、管理及合理开发利用提供科学依据。

Zanda earth forest with rich and varied forms spread along the Xiangquan River as group. In the basin center Zanda group stratum thickness, thinning to both sides, the two sides of the forest height is different, the lower edge of the forest soil. Regional climatic conditions, geological structure conditions, topographical conditions and material conditions are the main factors for the formation of the soil forest, and by the semi- consolidated soil thickness, water density and cutting depth constraints. In arid climates, sedimentary strata with horizontal bedding in the semiconsolidated state are continuously uplifted by geological tectonism, subjected to intense physical weathering and heavy rain erosion and severe water cut. The research on the formation and evolution of Zanda forest landscapes can provide scientific basis for the protection, management and rational exploitation and utilization of geological relics in Zanda Forest Landform, which has high scientific research value, aesthetic appreciation value and tourism economic value.