Geochemical Anomalies of Frozen Ground due to Hydrocarbon Migration in West Siberian Cryolithozone

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...

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Bibliographic Details
Published in:Geosciences (Basel) 2018-12, Vol.8 (12), p.430
Main Authors: Kurchatova, Anna, Rogov, Victor, Taratunina, Natalia
Format: Article
Language:English
Subjects:
Anomalies
authigenic minerals
biomorphic structures
Carbon
Carbonates
Clay
Cryoforming
cryolithozone
Crystallites
Crystals
Earth science
Frozen ground
Gases
Geochemistry
hydrocarbon migration
Hydrocarbons
hydrolaccolith
Ice
Iron
Mineralogy
Minerals
Oxides
Permafrost
Sediments
Sulfates
Sulphides
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Summary: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.
ISSN:2076-3263
2076-3263
DOI:10.3390/geosciences8120430