Relationship between Biomarker Parameters and the Nature of Brown Coal Accumulation
L. P. NOSKOVA
Institute of Geology and Nature Management, Far East Branch of the Russian Academy of Sciences, Blagoveshchensk, Russia
Keywords: allochthonous and autochthonous coals, n-alkanes, isoprenoids, steranes, terpanes
Pages: 64-70
Abstract
The composition and transformation dynamics of saturated hydrocarbon biomarkers in the coal of the Sergeevo deposit were studied using gas chromatography and gas chromatography - mass spectrometry. Depending on biomarker parameters in the studied section, the layers of allochthonous, autochthonous and mixed origin were identified, differing from each other in the nature and conditions of plant biomass accumulation. Allochthonous coals, enriched with bitumoids and genetically related to terragenic biomaterial, were formed in an oxidative environment. The transition to autochthonous and mixed coals was accompanied by an increase in the contribution from aquagene biomarkers and repeated changes in the facies conditions of sedimentation. Autochthonous coals are distinguished by an abnormal content of higher alkanes and a non-standard distribution of isoprenoid hydrocarbons.
DOI: 10.15372/CSD2023440
EDN: GRSGFE
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