Hopane hydrocarbons in bitumens of Mesozoic deposits of the western Yenisei-Khatanga regional trough

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• 作者：N.S. Kim^a ; ^{kimns@ipgg.sbras.ru" class="auth_mail" title="E-mail the corresponding author} ; A.P. Rodchenko^a ; ^b
• 关键词：organic matter ; Mesozoic deposits ; biomarker hydrocarbons ; 25-norhopanes ; rearranged hopanes ; West Siberian Basin ; Yenisei&ndash ; Khatanga regional trough
• 刊名：Russian Geology and Geophysics
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：57
• 期：4
• 页码：597-607
• 全文大小：862 K

文摘

We performed a chromato-mass-spectrometric study of the distribution of hopane hydrocarbons in the organic matter of Jurassic–Lower Cretaceous mudstones from wells drilled in the western Yenisei–Khatanga regional trough. A series of 25-norhopanes has been first identified; these hydrocarbons, often found in naphthides, are commonly related to biodegradation processes. We consider other hypotheses of formation of 25-norhopanes. Based on the examined distribution of rare rearranged hopanes, new biomarker parameters have been introduced, which ensure a more reliable estimation of the conditions of accumulation of organic matter in rocks and of its thermal maturity.