Geomorphic characteristics of the Himalayan moutains and its tectonic implications:New insights from SRTM digital elevation model and precipitation data
Wang Meng1, Liu Yan1, He Yanbo2, Wei Dong3
1. Institute of Geology, Chinese Academy of Geological Sciences, Beijing 10037; 2. National Meteorological Center of China, Beijing 100081; 3. Yichang Geological Team, Bureau of Geology and Mineral Resources of Hubei Province, Yichang, Hubei 443001
GTOPO30 and SRTM3 Digital Elevation Model(DEM)data were used to build up DEMs of the Himalayan mountains,and the morphotectonic issues,such as elevation and slope,were subsequently discussed.The figures of elevation and slope could contribute to the demonstration of the larger fault systems within the Himalayan orogen.Annual precipitation data of about 55 years from the meteorological stations within Tibetan plateau were analyzed.In combination with annual precipitation data of the south Himalaya from recent references,these precipitation data and DEMs illustrated that the precipitation decreased and the elevation increased with the decrease of relief across the Himalaya in the westward and northward orders.Fission track data of apatite from the Himalaya and south Tibet also showed that from east to west and from south to north,the denudation rates decreased,coupling with the precipitation data.What mentioned above suggested clearly that the regions with high annual precipitation underwent stronger erosion,indicative of the coupled of long-term landscape denudation with short-term precipitation observations within the Himalaya.
Wang Meng,Liu Yan,He Yanbo et al. Geomorphic characteristics of the Himalayan moutains and its tectonic implications:New insights from SRTM digital elevation model and precipitation data[J]. Chinese Journal of Geology, 2008, (3): 603-622.