Steranes in Neoproterozoic Oils from the Nepa-Botuoba Anteclise in the Siberian Platform and the South Oman Salt Basin in the Arabian Platform


статья в журнале
Авторы: Kashirtsev V.A.   (ИНГГ СО РАН)   Kontorovich A.E.   (ИНГГ СО РАН)   Kim N.S.   (ИНГГ СО РАН)   Chalaya O.N.     Zueva I.N.    
дата публикации: 2015
реферат:
A number of rare sterane hydrocarbons untypical of younger Phanerozoic petroleum systems have been found by gas chromatography-mass spectrometry in crude oils from the Nepa-Botuoba anteclise of the Siberian platform and the South Oman salt basin of the Arabian platform (Huqf family oils). Among regular steranes, a continuous series of C21 to C30 hydrocarbons including the previously unknown C23-C25 isomers have been identified. It has been noted that short-chain C21 and C22 steranes are represented by the most ther mally stable pregnane species diginane and methyldiginane. Another series of steroids is represented by A-norsteranes, the structures demethylated at C10 (main fragment ion in the mass spectrum at m/z 203). Tricyclic hydrocarbons C26-C29 identified by m/z 219 have been attributed to the homologous series of 8,14-secosteranes. These chemofossils have a wide stratigraphic range of occurrence and, like modern minor secosterynes, can be associated with lipid membranes of sponge and their bacterial synbiotics.
первоисточник: Petroleum Chemistry
том: 3
страницы: 186-194
ISBN:
ISSN:
внешние ссылки:
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полный текст статьи

petr-2015-03-186