Evolution Mechanism of Dolomite Karst Peak Cluster-Canyon Landform:A Genesis View on Huanjiang, Guangxi
Guangxi Huanjiang Karst has been nominated as a site of World Natural Heritage. It is an expanding part of Guizhou Libo Karst World Natural Heritage. Huanjiang karst landform evolution is affected by lithology, geological structure, faults, joints, cracks and subsurface hydrological system and other factors. The rocks in Huanjiang are composed of high purity limestone, dolomite and other soluble carbonate rocks. Crustal movement made the area uplift. The rock stress caused fold fracture and uplift, faults joint development. Rainfall, higher temperature and soluble rocks erosion-corrosion effect caused by surface - groundwater made the erosion base level fall and the rivers incised conduct. The surface has undergone the denudation and erosion for a long time, and the process has made the landform evolve from infancy through adolescence into manhood late. They developed into fengcong valley, depression, canyon and fenglin depressions, valley, basin and multilayer cave as the main morphological diversity of cone Karst landscape. The formation of Huanjiang Karst has experienced the effects of intermontane basin, the diagenesis of the thick carbonate rock of the Carboniferous and the Karst action since the Cambrian, and the geomorphological evolution has gone through 3 main stages, namely, fold block mountain basin formation stage, Karst peak cluster-peak forest developmental stages and Karst Canyon formation stage. Evolution model follows the succession law orderly, which is from fengcong depression to peak valley, fengcong gorge, fenglin depression and fenglin valley. It reveals the main stages and evolution process of tropical-subtropical cone karst development.
Cone Karstevolution mechanismlandscape characterHuanjiang of Guangxi Province
国家科技期刊平台
NSTL
万方数据
维普
