Hydrocarbon Gases (C1-C5) and Organic Matter in Bottom Sediments of the Ivankovo Reservoir on The Volga River

Safronova, N.S.; Grishantseva, E.S.; Korobeinik, G.S.

Авторы: Safronova N.S., Grishantseva E.S., Korobeinik G.S.
Журнал: Water Resources
Том: 40
Номер: 3
Год издания: 2013
Издательство: Maik Nauka/Interperiodica Publishing
Местоположение издательства: Russian Federation
Первая страница: 285
Последняя страница: 296
DOI: 10.1134/S0097807813020085
Аннотация: The results of studying the composition of hydrocarbon gases (C1-C5) and organic matter in bottom sediments of the Ivankovo Reservoir in 1995, 2004, and 2005 are given. The methods used in the study include vapor-phase gas chromatography, instrumental pyrolysis gas chromatography, and mass-spectrometry for determining organic carbon δ 13 С org. The gas field of bottom sediments in different regions of the reservoir varies widely in terms of gas saturation and the spectrum of hydrocarbon gases. This suggests the heterogeneous composition of organic matter in the sediments and different condition of its input and transformation processes. The gases were found to contain saturated hydrocarbons from methane to pentane C1 − C5, including isomers i − C4 and i − C5 and unsaturated compounds C2 − C4. A correlation was found to exist between methane distribution and the distribution of its more high-molecular homologues, which confirms their genetic relationship in bottom sediments. The obtained results show an increase in the rate of microbiological processes and organic matter transformation for most regions in the Ivankovo Reservoir. The only exctption arethe zones of Moshkovichskii Bay and the section at Gorodnya and Konakovo, where technogenic organic matter is being accumulated. The high information value of hydrocarbon gases as biogeochemical markers of the sources of organic matter and the rates of its transformation is demonstrated. The isotopic composition of organic-matter carbon in the bottom sediments of the Ivankovo Reservoir δ 13 С varies from - 26.1 to - 30.86 ‰
Добавил в систему: Калько Ильдар Анатольевич

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Hydrocarbon Gases (C1-C5) and Organic Matter in Bottom Sediments of the Ivankovo Reservoir on The Volga Riverстатья

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