摘要
本文阐述用电测深法探明新藏公路沿线多年冻土南、北分布界限分别位于多玛以西30km、海拔4630m的沼泽地和大红柳滩以南10km、海拔4450m的谷地;甜水海湖盆区多年冻土厚度84m,地下冰厚度20m,有利于认识该区多年冻土的分布特征。
D.C.electric sounding, as one of main means for permafrost exploration along Xinjiang-Xizang Highway in 1987, had been used in delineating the pennafrost borders along this highway. The north boundary of continous permafrost is located at dry valley about 10 kilometers south of Dohongliutan, where the elevation is 4 450 m. The south border of continous permafrost is near a marsh land, 4 630 m a.s.l., about 30 kilometers west of Duoma, while Duoma, with the elevation of 4 430 m, is the south lower limit of sporadic permafrost.
At the bank of Tianshuihai lake, large blocks of groundice were found, the thickness of groundice measured by D.C. electric sounding is 20 meters, while the thickness of permafrost is 84 meters. Because of climatic cycle changing and lake alteration, the thawing layer has formed in vertical distribution of permafrost at Tianshuihai basin. The thawing layer is 10 meters thick. The thickness of permafrost overlaying on these thawing layers, found by D.C. electric sounding, is 6 meters.
出处
《冰川冻土》
CSCD
北大核心
1991年第3期255-260,共6页
Journal of Glaciology and Geocryology
关键词
冻土
电测深法勘探
剖面图
D.C.electric sounding, apparent resistivity, sectional drawing
