Features of geotemperature field and occurrence of permafrost section of Vilyui syneclise
https://doi.org/10.31242/2618-9712-2018-26-4-45-54
Abstract
In the paper, an analysis is carried out and evaluation of features of occurrence and thickness of permafrost section within the Vilyui syneclise is given on the basis of geothermal measurements and interpretation of standard well logging data on 46 exploration areas (112 deep wells). A significant heterogeneity of a geotemperature field, marked by intervals with different values and directions of a geothermal gradient is revealed. It is established that the thickness of the permafrost section within the structure varies from 45 to 820 m, and even within individual deposits, an amplitude of oscillations of a bottom of the permafrost section can reach 200 m. On the basis of the obtained studies, 3 regions are distinguished, differing by the features of the occurrence of the permafrost. Maps of the occurrence of a permafrost base and a series of the permafrost geothermal structures of the individual areas and the syneclise as a whole have been compiled.
Keywords
Vilyui syneclise,
permafrost section,
thickness of permafrost section,
temperature of rocks,
geothermal gradient,
intraterrestrial heat flow,
permafrost geothermal structure,
geological exploration area
Supporting agencies: The work was carried out within the framework of budget project IX.135.2. «Geotemperature field and transformation of cryolithozone of North Asia and mountain regions of Central Asia» and the integration Project of the SB RAS «Paleoreconstruction of thermal field and cryolithozone of Vilyui syneclise in Late Pleistocene – Holocene».
About the Authors
Valeriy Petrovich Semenov
P.I. Melnikov Permafrost Institute SB RAS
Russian Federation
Russian Federation
SEMENOV Valeriy Petrovich, Candidate of Geological and Mineralogical Sciences, Researcher, P.I. Melnikov Permafrost Institute SB RAS, 36 Merzlotnaya St., Yakutsk, 677010, Russia, semenov.vp@rambler.ru;
Mikhail Nikolaevich Zheleznyak
P.I. Melnikov Permafrost Institute SB RAS
Russian Federation
Russian Federation
ZHELEZNYAK Mikhail Nikolaevich, Doctor of Geological and Mineralogical Sciences, Principal Researcher, Director, P.I. Melnikov Permafrost Institute SB RAS, 36 Merzlotnaya St., Yakutsk, 677010, Russia,
http://orcid.org/0000-0003-4124-6579, fe@mpi.ysn.ru.
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Review
For citations:
Semenov V.P., Zheleznyak M.N. Features of geotemperature field and occurrence of permafrost section of Vilyui syneclise. Arctic and Subarctic Natural Resources. 2018;23(4):45-54. (In Russ.) https://doi.org/10.31242/2618-9712-2018-26-4-45-54
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