Яндекс.Метрика
9.10.2024 |

IPGG SB RAS to unveil the phenomenon of hazardous frost heave mounds in Yamal

Scientists from the Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of the Russian Academy of Sciences (IPGG SB RAS) have identified geophysical and geochemical indicators of nonclassical perennial frost heave mounds emerging in Central Yamal.

Gas emissions that have intensified in the last decade in Central Yamal tend to be accompanied by powerful explosions leaving from first meters to several tens of meters deep pockmarks (craters) on the landscape.

On the tundra surface, this process is preceded by the growth of a perennial frost heave mound, which subsequently explodes,” says Vladimir Olenchenko, Ph.D (geol.-mineral.), head of the Geoelectricity Laboratory at IPGG SB RAS ― This suggests that the origination process of such mounds differs from the mechanism of formation of classical frost mounds abounding in the Yamal tundra.




V.V. Olenchenko presented initial research results at the IPGG SB RAS geophysical seminar



In order to differentiate between hazardous frost mounds and classic bulgunnyakhs, the IPGG researchers conducted specialized geoelectrical and geochemical surveys, seismic study of several frost mounds in Central Yamal. The methods applied included electrical resistivity tomography and induced polarization (ERT-IP), seismic emission tomography, standing wave method and gas sampling for aromatic hydrocarbons.

Scientists from IPGG SB RAS will continue investigations of such nonclassical frost heave mounds during the next field season. There may be other scientific organizations willing to participate in these research works.

Published by IPGG Press Service