Research output: Contribution to journal › Article › peer-review
Organic geochemistry of rocks of the Mesoproterozoic Malgin Formation and their depositional environments (southeastern Siberian Platform). / Suslova, E. A.; Parfenova, T. M.; Saraev, S. V. et al.
In: Russian Geology and Geophysics, Vol. 58, No. 3-4, 01.04.2017, p. 516-528.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Organic geochemistry of rocks of the Mesoproterozoic Malgin Formation and their depositional environments (southeastern Siberian Platform)
AU - Suslova, E. A.
AU - Parfenova, T. M.
AU - Saraev, S. V.
AU - Nagovitsyn, K. E.
PY - 2017/4/1
Y1 - 2017/4/1
N2 - Organic matter (OM) and rocks of the upper member of the Mesoproterozoic Malgin Formation in the southeastern Siberian Platform have been studied by modern research methods. Analysis has revealed homologous series of alkanes, tricyclanes, and hopanes in the bitumens. Leiosphaeridia crassa, L. minutissima, cf. Leiosphaeridia tenuissima, cf. Glomovertella, and Oscillatoriopsis sp. have been identified among the rare microfossils preserved in mudstones. Geochemical, lithological, and paleontological studies have shown that bacterial microcommunities and, to a lesser extent, eukaryotic microorganisms were the main source of OM. Based on results of sedimentological analysis and study of biomarkers, the depositional environment has been reconstructed. A model for the accumulation of black shales and carbonate rocks of the Malgin Formation is considered. The hypothesis that the highly carbonaceous rocks formed in uncompensated depressions of shallow epicontinental marine suboxidation environments is substantiated. The petroleum potential and degree of OM catagenesis of the Malgin Formation rocks are evaluated. Pyrolysis, bitumen analysis, and hydrocarbon composition study have revealed autochthonous and parautochthonous bitumens in the oil shales, mudstones, and carbonate rocks. The obtained data show that the Malgin Formation rocks might have participated in petroleum generation in the Uchur-Maya region.
AB - Organic matter (OM) and rocks of the upper member of the Mesoproterozoic Malgin Formation in the southeastern Siberian Platform have been studied by modern research methods. Analysis has revealed homologous series of alkanes, tricyclanes, and hopanes in the bitumens. Leiosphaeridia crassa, L. minutissima, cf. Leiosphaeridia tenuissima, cf. Glomovertella, and Oscillatoriopsis sp. have been identified among the rare microfossils preserved in mudstones. Geochemical, lithological, and paleontological studies have shown that bacterial microcommunities and, to a lesser extent, eukaryotic microorganisms were the main source of OM. Based on results of sedimentological analysis and study of biomarkers, the depositional environment has been reconstructed. A model for the accumulation of black shales and carbonate rocks of the Malgin Formation is considered. The hypothesis that the highly carbonaceous rocks formed in uncompensated depressions of shallow epicontinental marine suboxidation environments is substantiated. The petroleum potential and degree of OM catagenesis of the Malgin Formation rocks are evaluated. Pyrolysis, bitumen analysis, and hydrocarbon composition study have revealed autochthonous and parautochthonous bitumens in the oil shales, mudstones, and carbonate rocks. The obtained data show that the Malgin Formation rocks might have participated in petroleum generation in the Uchur-Maya region.
KW - biomarkers
KW - black shales
KW - Malgin Formation
KW - Mesoproterozoic
KW - organic geochemistry
KW - sedimentology
KW - Siberian Platform
KW - MATTER
KW - HYDROCARBONS
KW - OILS
KW - BIOMARKERS
KW - EVOLUTION
KW - BASIN
KW - GENERATION
KW - VELKERRI FORMATION
KW - TASMANITES
UR - http://www.scopus.com/inward/record.url?scp=85018500362&partnerID=8YFLogxK
U2 - 10.1016/j.rgg.2016.09.027
DO - 10.1016/j.rgg.2016.09.027
M3 - Article
AN - SCOPUS:85018500362
VL - 58
SP - 516
EP - 528
JO - Russian Geology and Geophysics
JF - Russian Geology and Geophysics
SN - 1068-7971
IS - 3-4
ER -
ID: 10040370