NEW DATA ON THICKNESS OF PERMAFROST AT THE LENO-ALDAN WATERSHED
A.R. Kirillin, M.N. Zhelezniak, V.I. Zhizhin
Melnikov Permafrost Institute, SB RAS, Merzlotnaya str. 36, Yakutsk, 677010, Russia
Keywords: geothermal research, ground temperature, permafrost, Quaternary deposits, thermophysical properties, permafrost thickness
Abstract
The data on the ground temperature up to the depth of 650 m in a well with a restored thermal regime have been obtained for the first time for the Lena-Aldan interfluve. The abnormal permafrost thickness for this territory (750-780 m) has been determined by geothermal measurements. The change of ground temperature with depth displays the nonstationary contemporary regime of permafrost with the negative geothermal gradient up to a depth of 300 m. The permafrost thickness has been estimated and the possible reasons of its difference in relatively nearby areas are considered.
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