| Article |
|---|
| Article name |
GEOCRYOLOGICAL CONDITIONS IN THE KHANTAY HYDRO POWER PLANT DISTRICT |
| Authors |
Zabolotnik S.. сandidate of geological and mineralogical sciences, leading scientific researcher, senior researcher, zabolotnik@mpi.ysn.ru |
| Bibliographic description |
Zabolotnik S. Geocryological conditions of the Khantay hydro power plant district / / Transbaikal State University Journal, 2017, vol. 23, no. 5, pp. 4-14. |
| Category |
Earth science |
| DOI |
551.345 |
| DOI |
10.21209/2227-9245-2017-23-5-4-14 |
| Article type |
|
| Annotation |
Geocryological investigations were conducted in the far northwest of the Central Siberian Plateau, 60 km from the Khantaika River mouth. The results indicate that the area lies within the insular permafrost zone and that permafrost underlies about 60 % of its surface. Taliks are present wherever deep snow accumulation is possible.
Permafrost temperatures vary from near 0 °C to —1,2 °C, and the measured thickness of permafrost does not exceed 20 m. The permafrost thickness ranges from 10 to 15 m in most of the area and may occasionally reach 30.35 m as inferred from indirect information. The high temperatures and low thicknesses of permafrost, as well as the widespread occurrence of taliks are primarily due to the thick snow cover, reaching 1 m or more in depth.
The ice content of frozen sediments varies over a wide range, from 5.25 % in sands to 80.90 % in peat. Sandy silts and clayey silts which dominate the area have ice contents of 15.30 and 50.60 %, respectively.
Seasonal thaw depths are 0,3...0,4 m in peatland, while sandy and clayey silts thaw to a depth of 1.0 m. In talik areas, the depth of seasonal freezing varies from 0,8.1,2 m. |
| Key words |
permafrost; taliks; snow cover; seasonal thawing (freezing) depth; geocryological conditions; Khantay hydro power plant; sandy loamy soils; frozen deposits; cryolithozone; BAM zone |
| Article information |
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| References |
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| Full article | GEOCRYOLOGICAL CONDITIONS IN THE KHANTAY HYDRO POWER PLANT DISTRICT |
