Abstract
Cryogenesis and geodynamics of icing valleys
Highlights
A large aufeis deposit is clearly visible in the terrain
The more contrasting is the terrain, the more active are neotectonic movements, the lower is the mean annual air temperature, and the higher is the annual percentage of the territory covered by aufeis ice
The total area of aufeis deposits amounts to 40000 km2, and the number of ice clusters (0.77 km2 in average) exceeds 60000
Summary
A large aufeis deposit (taryn) is clearly visible in the terrain. In winter, even when frosts are severe, the taryn is typically marked by 'streaming' at groundwater seeping spots or evidenced by ice-covered surfaces extending for many kilometres. The information available from publications is mainly based on visual observations during short-term field studies; geocryological profiles, special maps and instrumental measurement data are quite rare This publications is based on data collected by the author in long-term field studies in Yakutia, Transbaikalie, Pribaikalie and East Sayan mountains and surface and aerial surveys of aufeis and icing processes on the Charskie Peski and Eden polygons, as well as on published data on other permafrost regions (Fig. 1), including remote sounding materials and satellite data available in Google. Its major area is occupied by the right-side floodplain of the Middle Sakukan river, the wide boggy valley of the Bolotny brook, which is neighbouring the floodplain at the west, and valleys of the Kholodny and Alyonushka brooks, both going across the mass of drift sands In this territory, the total thickness of the permafrost bed, including sand, sandy clay, boulder-pebble deposits, and peat, ranges from 300 to 350 m. Aerial photos and land survey data were consolidated in a database for mapping, and 13 large-scale landscape-glaciological maps covered sites located in the mountain-taiga belt (9 maps), sub-goltsy (2 maps) and goltsy belts (2 maps) [Alekseyev, 2005]
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call