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Keywords = hydrolaccolith

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12 pages, 8608 KiB  
Article
Geochemical Anomalies of Frozen Ground due to Hydrocarbon Migration in West Siberian Cryolithozone
by Anna Kurchatova, Victor Rogov and Natalia Taratunina
Geosciences 2018, 8(12), 430; https://doi.org/10.3390/geosciences8120430 - 22 Nov 2018
Cited by 1 | Viewed by 3009
Abstract
According to the study of frozen deposits in the territory south of the Taz Peninsula, geochemical processes are considered under the hydrocarbon migration from the lower productive complex. An analysis of the cryolithological structure of the frozen stratum was performed, and the composition [...] Read more.
According to the study of frozen deposits in the territory south of the Taz Peninsula, geochemical processes are considered under the hydrocarbon migration from the lower productive complex. An analysis of the cryolithological structure of the frozen stratum was performed, and the composition of the gas and authigenic associations was studied. It was shown that the migration of gases is caused by shear deformations with the formation of cryogenic textures with the presence of gas-bearing ice crystallites on slip surfaces. It was found that the migration of hydrocarbons causes significant local changes in pH/Eh parameters in the frozen stratum and determines the micromosaic distribution of sulfate and iron reduction processes that lead to the formation (including microbiological processes) of various forms of iron: sulphides, carbonates and oxides. Full article
(This article belongs to the Special Issue Gas and Gas Hydrate in Permafrost)
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