Hydrocarbon molecular markers in the Holocene bottom sediments of the Barents Sea as indicators of natural and anthropogenic impacts
| Autor: | G. Batova, Vera Petrova, Andrei I. Granovitch, Ivan Litvinenko, Anna Kursheva, Inna Morgunova, Paul E. Renaud |
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| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Geologic Sediments Geochemistry 010501 environmental sciences Aquatic Science Oceanography 01 natural sciences Natural (archaeology) Russia Svalbard Organic matter Coal Oil and Gas Fields Polycyclic Aromatic Hydrocarbons Holocene 0105 earth and related environmental sciences Maturity (geology) chemistry.chemical_classification business.industry Arctic Regions 010604 marine biology & hydrobiology Pollution Hopanoids Hydrocarbons Biomarker (petroleum) Monocline Petroleum chemistry Environmental science business Water Pollutants Chemical Environmental Monitoring |
| Zdroj: | Marine pollution bulletin. 149 |
| ISSN: | 1879-3363 |
| Popis: | The recent intensification of energy resource exploration and human activities in the Barents Sea (BS) requires a more thorough assessment of the natural and anthropogenic impact of hydrocarbons on the environment. We analyzed a wide set of sensitive indicators, including hydrocarbon molecular markers and organic matter (OM) maturity parameters in the Holocene sediments from three regions of the BS: the Kola-Kanin Monocline (KKM), the Svalbard shelf, and the Shtokman gas-condensate field (GCF). An increase in pyrogenic polycyclic aromatic hydrocarbons toward the core surface traces the intensification of anthropogenic contamination in the KKM region during last century. An input of highly mature OM from the eroded coal rocks of Barentsburg were confirmed by comparison of biomarker distribution in sediments and coals. An increase in biogenic hopanes and hopenes content down-core, and a crude-oil stage of OM maturity in surface sediments of the Shtokman GCF attests to hydrocarbons migration from subsurface strata. |
| Databáze: | OpenAIRE |
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