13 research outputs found
Composition of Sedimentary Organic Matter across the Laptev Sea Shelf: Evidences from Rock-Eval Parameters and Molecular Indicators
Global warming in high latitudes causes destabilization of vulnerable permafrost deposits followed by massive thaw-release of organic carbon. Permafrost-derived carbon may be buried in the nearshore sediments, transported towards the deeper basins or degraded into the greenhouse gases, potentially initiating a positive feedback to climate change. In the present study, we aim to identify the sources, distribution and degradation state of organic matter (OM) stored in the surface sediments of the Laptev Sea (LS), which receives a large input of terrestrial carbon from both Lena River discharge and intense coastal erosion. We applied a suite of geochemical indicators including the Rock Eval parameters, traditionally used for the matured OM characterization, and terrestrial lipid biomarkers. In addition, we analyzed a comprehensive grain size data in order to assess hydrodynamic sedimentation regime across the LS shelf. Rock-Eval (RE) data characterize LS sedimentary OM with generally low hydrogen index (100β200 mg HC/g TOC) and oxygen index (200 and 300 CO2/g TOC) both increasing off to the continental slope. According to Tpeak values, there is a clear regional distinction between two groups (369β401 Β°C for the inner and mid shelf; 451β464 Β°C for the outer shelf). We suggest that permafrost-derived OM is traced across the shallow and mid depths with high Tpeak and slightly elevated HI values if compared to other Arctic continental margins. Molecular-based degradation indicators show a trend to more degraded terrestrial OC with increasing distance from the coast corroborating with RE results. However, we observed much less variation of the degradation markers down to the deeper sampling horizons, which supports the notion that the most active OM degradation in LS land-shelf system takes part during the cross-shelf transport, not while getting buried deeper
Sonar Estimation of Methane Bubble Flux from Thawing Subsea Permafrost: A Case Study from the Laptev Sea Shelf
Seeps found offshore in the East Siberian Arctic Shelf may mark zones of degrading subsea permafrost and related destabilization of gas hydrates. Sonar surveys provide an effective tool for mapping seabed methane fluxes and monitoring subsea Arctic permafrost seepage. The paper presents an overview of existing approaches to sonar estimation of methane bubble flux from the sea floor to the water column and a new method for quantifying CH4 ebullition. In the suggested method, the flux of methane bubbles is estimated from its response to insonification using the backscattering cross section. The method has demonstrated its efficiency in the case study of single- and multi-beam acoustic surveys of a large seep field on the Laptev Sea shelf
Organic carbon in surface sediments of Laptev Sea and East Siberian Sea: observation of pyrolysis data
ΠΠΊΡΡΠ°Π»ΡΠ½ΠΎΡΡΡ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ ΠΎΠ±ΡΡΠ»ΠΎΠ²Π»Π΅Π½Π° Π½Π΅ΠΎΠ±Ρ
ΠΎΠ΄ΠΈΠΌΠΎΡΡΡΡ ΠΈΠ·ΡΡΠ΅Π½ΠΈΡ ΠΌΠ΅Ρ
Π°Π½ΠΈΠ·ΠΌΠΎΠ² ΡΡΠ°Π½ΡΡΠΎΡΠΌΠ°ΡΠΈΠΈ ΠΈ Π½Π°ΠΊΠΎΠΏΠ»Π΅Π½ΠΈΡ ΡΠ΅ΡΡΠΈΠ³Π΅Π½Π½ΠΎΠ³ΠΎ ΠΎΡΠ³Π°Π½ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠ³Π»Π΅ΡΠΎΠ΄Π°, Π²ΡΡΠ²ΠΎΠ±ΠΎΠΆΠ΄Π°Π΅ΠΌΠΎΠ³ΠΎ ΠΈΠ· ΠΌΠ΅ΡΠ·Π»ΠΎΡΠ½ΡΡ
ΡΠΎΠ»Ρ, Π½Π° ΡΠ΅Π»ΡΡΠ΅ Π°ΡΠΊΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΌΠΎΡΠ΅ΠΉ. ΠΡΠΈ ΠΏΠ΅ΡΠ΅Π½ΠΎΡΠ΅ Π² ΡΠΈΡΡΠ΅ΠΌΠ΅ Β«ΡΡΡΠ°-ΠΌΠΎΡΠ΅Β» ΠΎΠ½ ΠΌΠΎΠΆΠ΅Ρ Π² Π΄Π°Π»ΡΠ½Π΅ΠΉΡΠ΅ΠΌ Π½Π°ΠΊΠ°ΠΏΠ»ΠΈΠ²Π°ΡΡΡΡ Π² Π΄ΠΎΠ½Π½ΡΡ
ΠΎΡΠ°Π΄ΠΊΠ°Ρ
Π² ΡΠ΅Π»ΡΡΠΎΠ²ΠΎΠΉ ΠΈΠ»ΠΈ Π³Π»ΡΠ±ΠΎΠΊΠΎΠ²ΠΎΠ΄Π½ΠΎΠΉ Π·ΠΎΠ½Π΅ ΠΈ ΠΏΠΎΠ΄Π²Π΅ΡΠ³Π°ΡΡΡΡ Π΄Π΅Π³ΡΠ°Π΄Π°ΡΠΈΠΈ ΠΈ ΡΠ΅ΠΌΠΈΠ½Π΅ΡΠ°Π»ΠΈΠ·Π°ΡΠΈΠΈ, ΡΡΠΎ ΠΏΡΠΈΠ²ΠΎΠ΄ΠΈΡ ΠΊ ΠΊΡΠΈΡΠΈΡΠ΅ΡΠΊΠΈΠΌ ΡΠΊΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΠΌ ΠΏΠΎΡΠ»Π΅Π΄ΡΡΠ²ΠΈΡΠΌ. Π¦Π΅Π»Ρ: ΡΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΈΠ΅ ΠΈΡΡΠΎΡΠ½ΠΈΠΊΠΎΠ² ΠΈ ΡΡΠ΅ΠΏΠ΅Π½ΠΈ Π΄ΠΈΠ°Π³Π΅Π½Π΅ΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΏΡΠ΅ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π½Π½ΠΎΡΡΠΈ ΡΠ΅ΡΡΠΈΠ³Π΅Π½Π½ΠΎΠ³ΠΎ ΠΎΡΠ³Π°Π½ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ Π²Π΅ΡΠ΅ΡΡΠ²Π° Π² ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠ½ΡΡ
ΠΎΡΠ°Π΄ΠΊΠ°Ρ
ΠΌΠΎΡΠ΅ΠΉ ΠΠΎΡΡΠΎΡΠ½ΠΎΠΉ ΠΡΠΊΡΠΈΠΊΠΈ. ΠΠ±ΡΠ΅ΠΊΡΠΎΠΌ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ ΠΏΠΎΡΠ»ΡΠΆΠΈΠ»ΠΈ ΠΏΡΠΎΠ±Ρ Π΄ΠΎΠ½Π½ΡΡ
ΠΎΡΠ°Π΄ΠΊΠΎΠ², Π²Π·ΡΡΡΠ΅ Ρ ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠ½ΠΎΠ³ΠΎ Π³ΠΎΡΠΈΠ·ΠΎΠ½ΡΠ° (0-10 ΡΠΌ). ΠΡΠ±ΠΎΡ ΠΏΡΠΎΠ± ΠΏΡΠΎΠ²ΠΎΠ΄ΠΈΠ»ΡΡ Π² ΠΌΠΎΡΡΠΊΠΈΡ
ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°ΡΠ΅Π»ΡΡΠΊΠΈΡ
ΡΠΊΡΠΏΠ΅Π΄ΠΈΡΠΈΡΡ
2011-2019 Π³Π³. Π Π΅Π·ΡΠ»ΡΡΠ°ΡΡ. ΠΠ°ΡΠ΅ΡΠ°Π»ΡΠ½Π°Ρ Π²ΡΠ΄Π΅ΡΠΆΠ°Π½Π½ΠΎΡΡΡ Π·Π½Π°ΡΠ΅Π½ΠΈΠΉ Π²ΠΎΠ΄ΠΎΡΠΎΠ΄Π½ΠΎΠ³ΠΎ ΠΈΠ½Π΄Π΅ΠΊΡΠ° Π² ΡΠΎΠ²ΡΠ΅ΠΌΠ΅Π½Π½ΡΡ
ΠΎΡΠ°Π΄ΠΊΠ°Ρ
Π² ΠΌΠΎΡΠ΅ ΠΠ°ΠΏΡΠ΅Π²ΡΡ
ΡΠ²ΡΠ·Π°Π½Π° Ρ Π²ΠΊΠ»Π°Π΄ΠΎΠΌ Π³Π΅ΡΠ΅ΡΠΎΠ³Π΅Π½Π½ΠΎΠ³ΠΎ Π½Π°Π·Π΅ΠΌΠ½ΠΎΠ³ΠΎ ΠΎΡΠ³Π°Π½ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ Π²Π΅ΡΠ΅ΡΡΠ²Π°, Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΠ·ΡΡΡΠ΅Π³ΠΎΡΡ ΠΎΡΠ½ΠΎΡΠΈΡΠ΅Π»ΡΠ½ΠΎΠΉ Π±ΠΈΠΎΠ³Π΅ΠΎΡ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠΎΠΉ Π΄ΠΎΡΡΡΠΏΠ½ΠΎΡΡΡΡ: Π²ΠΎΠ΄ΠΎΡΠΎΠ΄ΠΎΠ½Π°ΡΡΡΠ΅Π½Π½ΠΎΠ΅ Π½Π°Π·Π΅ΠΌΠ½ΠΎΠ΅ ΠΎΡΠ³Π°Π½ΠΈΡΠ΅ΡΠΊΠΎΠ΅ Π²Π΅ΡΠ΅ΡΡΠ²ΠΎ ΡΠΌΠ΅Π½ΡΠ΅ΡΡΡ ΠΌΠΎΡΡΠΊΠΈΠΌ Ρ ΡΠΎΡ
ΡΠ°Π½Π΅Π½ΠΈΠ΅ΠΌ Π²Π΅Π»ΠΈΡΠΈΠ½Ρ Π²ΠΎΠ΄ΠΎΡΠΎΠ΄Π½ΠΎΠ³ΠΎ ΠΈΠ½Π΄Π΅ΠΊΡΠ°. ΠΡΠΎ ΠΎΡΠ»ΠΈΡΠ°Π΅Ρ ΠΌΠΎΡΠ΅ ΠΠ°ΠΏΡΠ΅Π²ΡΡ
ΠΎΡ Π΄ΡΡΠ³ΠΈΡ
Π°ΡΠΊΡΠΈΡΠ΅ΡΠΊΠΈΡ
Π°ΠΊΠ²Π°ΡΠΎΡΠΈΠΉ, Π³Π΄Π΅ ΠΏΠΎ ΠΌΠ΅ΡΠ΅ ΡΠ΄Π°Π»Π΅Π½ΠΈΡ ΠΎΡ Π±Π΅ΡΠ΅Π³Π° ΠΎΡΠΌΠ΅ΡΠ°Π»ΡΡ ΡΡΡΠΎΠΉΡΠΈΠ²ΡΠΉ ΡΠΎΡΡ Π·Π½Π°ΡΠ΅Π½ΠΈΡ Π²ΠΎΠ΄ΠΎΡΠΎΠ΄Π½ΠΎΠ³ΠΎ ΠΈΠ½Π΄Π΅ΠΊΡΠ° Π² ΡΠ²ΡΠ·ΠΈ Ρ ΡΡΠΈΠ»Π΅Π½ΠΈΠ΅ΠΌ Π²ΠΊΠ»Π°Π΄Π° Π°Π²ΡΠΎΡ
ΡΠΎΠ½Π½ΠΎΠ³ΠΎ ΠΎΡΠ³Π°Π½ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ Π²Π΅ΡΠ΅ΡΡΠ²Π°. Π ΡΠΎΠΎΡΠ½ΠΎΡΠ΅Π½ΠΈΠΈ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠΎΠ² Ξ΄13C ΠΈ HI/OI Π½Π°Π±Π»ΡΠ΄Π°ΡΡΡΡ Π·Π½Π°ΡΠΈΡΠ΅Π»ΡΠ½ΡΠ΅ ΠΎΡΠΊΠ»ΠΎΠ½Π΅Π½ΠΈΡ ΠΎΡ Π»ΠΈΠ½Π΅ΠΉΠ½ΠΎΠΉ Π·Π°Π²ΠΈΡΠΈΠΌΠΎΡΡΠΈ, Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠ½ΠΎΠΉ Π΄Π»Ρ ΠΊΠΎΠ½ΡΠ΅ΡΠ²Π°ΡΠΈΠ²Π½ΠΎΠ³ΠΎ Π³Π΅ΠΎΡ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠ΅ΠΆΠΈΠΌΠ° ΠΌΠΎΡΡΠΊΠΈΡ
Π°ΠΊΠ²Π°ΡΠΎΡΠΈΠΉ: ΡΠ΅ΡΡΠΈΠ³Π΅Π½Π½ΡΠΉ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π» Π² ΠΎΡΠ°Π΄ΠΊΠ°Ρ
Π³ΡΠ±Ρ ΠΡΠΎΡ-Π₯Π°Ρ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΠ·ΡΠ΅ΡΡΡ Π»Π΅Π³ΠΊΠΈΠΌ ΠΈΠ·ΠΎΡΠΎΠΏΠ½ΡΠΌ ΡΠΎΡΡΠ°Π²ΠΎΠΌ Ξ΄13C ΠΈ ΠΏΠΎΠ²ΡΡΠ΅Π½Π½ΡΠΌΠΈ ΠΎΡΠ½ΠΎΡΠ΅Π½ΠΈΠ΅ΠΌ HI/OI, Π½Π΅ΡΠΈΠΏΠΈΡΠ½ΡΠΌ Π΄Π»Ρ Π½Π°Π·Π΅ΠΌΠ½ΠΎΠ³ΠΎ Π³Π΅Π½Π΅Π·ΠΈΡΠ°. ΠΠ»Ρ ΠΎΡΠ³Π°Π½ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ Π²Π΅ΡΠ΅ΡΡΠ²Π°, Π½Π°ΠΊΠΎΠΏΠ»Π΅Π½Π½ΠΎΠ³ΠΎ Π² Π³Π»ΡΠ±ΠΎΠΊΠΎΠ²ΠΎΠ΄Π½ΡΡ
ΠΎΡΠ°Π΄ΠΊΠ°Ρ
ΠΊΠΎΠ½ΡΠΈΠ½Π΅Π½ΡΠ°Π»ΡΠ½ΠΎΠ³ΠΎ ΡΠΊΠ»ΠΎΠ½Π°, Π½Π°ΠΏΡΠΎΡΠΈΠ², ΠΎΡΠΌΠ΅ΡΠ°Π΅ΡΡΡ Π½ΠΈΠ·ΠΊΠΎΠ΅ ΡΠΎΠ΄Π΅ΡΠΆΠ°Π½ΠΈΠ΅ Π²ΠΎΠ΄ΠΎΡΠΎΠ΄Π° ΠΈ Π²ΡΡΠΎΠΊΠ°Ρ Π΄ΠΎΠ»Ρ ΠΊΠΈΡΠ»ΠΎΡΠΎΠ΄ΡΠΎΠ΄Π΅ΡΠΆΠ°ΡΠΈΡ
ΡΠΎΠ΅Π΄ΠΈΠ½Π΅Π½ΠΈΠΉ, ΡΠ²ΠΈΠ΄Π΅ΡΠ΅Π»ΡΡΡΠ²ΡΡΡΠΈΡ
ΠΎ Π·Π½Π°ΡΠΈΡΠ΅Π»ΡΠ½ΠΎΠΉ ΡΡΠ΅ΠΏΠ΅Π½ΠΈ Π΄ΠΈΠ°Π³Π΅Π½Π΅ΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΏΡΠ΅ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π½Π½ΠΎΡΡΠΈ ΠΎΡΠ³Π°Π½ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ Π²Π΅ΡΠ΅ΡΡΠ²Π°.Ongoing global warming accelerates release of relict terrigenous organic carbon from permafrost onto the Arctic shelf waters. When transported in the land-sea system, it can further be accumulated in bottom sediments in the shelf or deep-sea zone and undergo degradation and remineralization, which leads to critical environmental consequences. This study aims at assessing the sources and degradation degree of terrigenous organic matter in the surface sediments of the Eastern Arctic seas. Within this study, marine bottom sediments taken from the surface horizon (0-10 cm) were investigated. Sampling was carried out during the 2011-2019 marine research expeditions. Lateral consistency of hydrogen index values in modern marine sediments on the Eastern Arctic shelf (mainly in the Laptev Sea) is associated with the great contribution of heterogeneous biolabile terrestrial organic matter, in contrast to other Arctic waters, where growing hydrogen index values are associated with the consistently growing contribution of autochthonous organic matter with increasing distance from the coast. While considering the Ξ΄13C and HI/OI correlation, there are also significant deviations from the linear dependence which usually indicates a conservative marine geochemical regime. Sediments of the Buor-Khaya Bay are characterized by an increased HI/OI values in contrast to the deep-water sediments of the continental slope which shows lower hydrogen content and a higher proportion of oxygencontaining compounds, indicating a strong transformation of organic matter. These findings confirm a key role of terrigenous supply in specific biogeochemical conditions in the studied area and reveal that geochemical indicators of immature organic matter sources in the Eastern Arctic seas should be interpreted differently from other Arctic continental margins
Composition of organic matter in bottom sediments of the Chaunskaya Bay (East Siberian Sea)
ΠΠΊΡΡΠ°Π»ΡΠ½ΠΎΡΡΡ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ ΠΎΠΏΡΠ΅Π΄Π΅Π»ΡΠ΅ΡΡΡ Π½Π΅ΠΎΠ±Ρ
ΠΎΠ΄ΠΈΠΌΠΎΡΡΡΡ ΠΎΡΠ΅Π½ΠΊΠΈ ΡΠ΅Π³ΠΈΠΎΠ½Π°Π»ΡΠ½ΡΡ
ΠΎΡΠΎΠ±Π΅Π½Π½ΠΎΡΡΠ΅ΠΉ ΡΡΠ°Π½ΡΠΏΠΎΡΡΠ° ΠΈ ΠΏΡΠ΅ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π½ΠΈΡ ΠΎΡΠ³Π°Π½ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ Π²Π΅ΡΠ΅ΡΡΠ²Π° Π² ΡΠ°Π·Π»ΠΈΡΠ½ΡΡ
ΡΠ΅Π΄ΠΈΠΌΠ΅Π½ΡΠ°ΡΠΈΠΎΠ½Π½ΡΡ
ΠΈ Π±ΠΈΠΎΠ³Π΅ΠΎΡ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΎΠ±ΡΡΠ°Π½ΠΎΠ²ΠΊΠ°Ρ
, Π΄Π΅ΠΉΡΡΠ²ΡΡΡΠΈΡ
Π½Π° ΠΠΎΡΡΠΎΡΠ½ΠΎΠ‘ΠΈΠ±ΠΈΡΡΠΊΠΎΠΌ Π°ΡΠΊΡΠΈΡΠ΅ΡΠΊΠΎΠΌ ΡΠ΅Π»ΡΡΠ΅, Π² ΡΠΎΠΌ ΡΠΈΡΠ»Π΅ Π² ΠΠΎΡΡΠΎΡΠ½ΠΎ-Π‘ΠΈΠ±ΠΈΡΡΠΊΠΎΠΌ ΠΌΠΎΡΠ΅ - Π½Π°ΠΈΠ±ΠΎΠ»Π΅Π΅ Π»Π΅Π΄ΠΎΠ²ΠΈΡΠΎΠΌ ΠΈ Π½Π°ΠΈΠΌΠ΅Π½Π΅Π΅ ΠΈΠ·ΡΡΠ΅Π½Π½ΠΎΠΌ ΠΌΠΎΡΠ΅ Π ΠΎΡΡΠΈΠΉΡΠΊΠΎΠΉ ΠΡΠΊΡΠΈΠΊΠΈ. Π¦Π΅Π»Ρ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ Π·Π°ΠΊΠ»ΡΡΠ°Π΅ΡΡΡ Π² ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΠΈ ΡΠΎΡΡΠ°Π²Π° ΠΈ ΠΈΡΡΠΎΡΠ½ΠΈΠΊΠΎΠ² ΠΎΡΠ³Π°Π½ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ Π²Π΅ΡΠ΅ΡΡΠ²Π° Π΄ΠΎΠ½Π½ΡΡ
ΠΎΡΠ°Π΄ΠΊΠΎΠ² Π§Π°ΡΠ½ΡΠΊΠΎΠΉ Π³ΡΠ±Ρ (ΠΠΎΡΡΠΎΡΠ½ΠΎ-Π‘ΠΈΠ±ΠΈΡΡΠΊΠΎΠ΅ ΠΌΠΎΡΠ΅). ΠΠ±ΡΠ΅ΠΊΡΡ: 25 ΠΏΡΠΎΠ± ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠ½ΡΡ
Π΄ΠΎΠ½Π½ΡΡ
ΠΎΡΠ°Π΄ΠΊΠΎΠ², ΠΎΡΠΎΠ±ΡΠ°Π½Π½ΡΡ
ΠΏΠΎ ΠΏΡΠΎΡΠΈΠ»Ρ ΠΎΡ ΠΏΡΠΈΠ±ΡΠ΅ΠΆΠ½ΠΎΠΉ Π·ΠΎΠ½Ρ Π§Π°ΡΠ½ΡΠΊΠΎΠΉ Π³ΡΠ±Ρ Π΄ΠΎ Π²Π½ΡΡΡΠ΅Π½Π½Π΅ΠΉ ΡΠ°ΡΡΠΈ ΡΠ΅Π»ΡΡΠ° ΠΠΎΡΡΠΎΡΠ½ΠΎ-Π‘ΠΈΠ±ΠΈΡΡΠΊΠΎΠ³ΠΎ ΠΌΠΎΡΡ Π² Ρ
ΠΎΠ΄Π΅ ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠ½ΠΎΠΉ Π½Π°ΡΡΠ½ΠΎ-ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°ΡΠ΅Π»ΡΡΠΊΠΎΠΉ ΠΌΠΎΡΡΠΊΠΎΠΉ ΡΠΊΡΠΏΠ΅Π΄ΠΈΡΠΈΠΈ Π½Π° Π±ΠΎΡΡΡ ΠΠΠ‘ Β«ΠΠΊΠ°Π΄Π΅ΠΌΠΈΠΊ ΠΠΏΠ°ΡΠΈΠ½Β» Π² ΡΠ΅Π½ΡΡΠ±ΡΠ΅-ΠΎΠΊΡΡΠ±ΡΠ΅ 2020 Π³. ΠΠ΅ΡΠΎΠ΄Ρ. ΠΠ»Ρ Π°Π½Π°Π»ΠΈΠ·Π° Π³ΡΡΠΏΠΏ ΡΠ³Π»Π΅Π²ΠΎΠ΄ΠΎΡΠΎΠ΄Π½ΡΡ
ΡΠΎΠ΅Π΄ΠΈΠ½Π΅Π½ΠΈΠΉ ΠΠ Π΄ΠΎΠ½Π½ΡΡ
ΠΎΡΠ°Π΄ΠΊΠΎΠ² Π±ΡΠ» ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½ ΠΏΠΈΡΠΎΠ»ΠΈΡΠΈΡΠ΅ΡΠΊΠΈΠΉ Π°Π½Π°Π»ΠΈΠ· ΠΏΠΎ ΠΌΠ΅ΡΠΎΠ΄Ρ Rock-Eval; ΠΎΡΠ΅Π½ΠΊΠ° ΡΠ°ΡΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΡ Π½-Π°Π»ΠΊΠ°Π½ΠΎΠ² ΠΏΡΠΎΠ²ΠΎΠ΄ΠΈΠ»Π°ΡΡ Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠΎΠ² Π³Π°Π·ΠΎΠ²ΠΎΠΉ Ρ
ΡΠΎΠΌΠ°ΡΠΎ-ΠΌΠ°ΡΡ-ΡΠΏΠ΅ΠΊΡΡΠΎΠΌΠ΅ΡΡΠΈΠΈ. ΠΡΠ°Π½ΡΠ»ΠΎΠΌΠ΅ΡΡΠΈΡΠ΅ΡΠΊΠΈΠΉ Π°Π½Π°Π»ΠΈΠ· ΠΎΡΠ°Π΄ΠΊΠΎΠ² Π²ΡΠΏΠΎΠ»Π½ΡΠ»ΡΡ Π½Π° Π»Π°Π·Π΅ΡΠ½ΠΎΠΌ Π°Π½Π°Π»ΠΈΠ·Π°ΡΠΎΡΠ΅ ΡΠ°ΡΡΠΈΡ. Π Π΅Π·ΡΠ»ΡΡΠ°ΡΡ. Π‘ΠΎΡΡΠ°Π² ΠΎΡΠ°Π΄ΠΎΡΠ½ΠΎΠ³ΠΎ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Π° Π² Π§Π°ΡΠ½ΡΠΊΠΎΠΉ Π³ΡΠ±Π΅ ΠΏΡΠ΅ΠΈΠΌΡΡΠ΅ΡΡΠ²Π΅Π½Π½ΠΎ ΠΎΠΏΡΠ΅Π΄Π΅Π»ΡΠ΅ΡΡΡ ΠΎΡΠΎΠ±Π΅Π½Π½ΠΎΡΡΡΠΌΠΈ ΠΏΠΎΠ΄Π²ΠΎΠ΄Π½ΠΎΠ³ΠΎ ΡΠ΅Π»ΡΠ΅ΡΠ° ΠΈ Π³ΡΠ°Π²ΠΈΡΠ°ΡΠΈΠΎΠ½Π½ΡΠΌΠΈ ΠΏΠΎΡΠΎΠΊΠ°ΠΌΠΈ ΠΏΠΎΡΡΡΠΏΠ°ΡΡΠ΅Π³ΠΎ ΡΠ΅ΡΡΠΈΠ³Π΅Π½Π½ΠΎΠ³ΠΎ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Π° - ΠΏΡΠΎΠ΄ΡΠΊΡΠΎΠ² Π»ΠΎΠΊΠ°Π»ΡΠ½ΠΎΠΉ ΡΠ΅ΡΠΌΠΎΠ°Π±ΡΠ°Π·ΠΈΠΈ Π±Π΅ΡΠ΅Π³ΠΎΠ²ΠΎΠΉ Π·ΠΎΠ½Ρ (ΠΎ. ΠΠΉΠΎΠ½) ΠΈ ΡΠ΅ΡΠ½ΠΎΠ³ΠΎ Π°Π»Π»ΡΠ²ΠΈΡ Π² ΡΠ³ΠΎ-Π²ΠΎΡΡΠΎΡΠ½ΠΎΠΉ ΡΠ°ΡΡΠΈ Π³ΡΠ±Ρ. ΠΠΏΡΠ΅Π΄Π΅Π»Π΅Π½Π½ΡΡ ΡΠΎΠ»Ρ Π² ΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½ΠΈΠΈ ΡΠ΅Π΄ΠΈΠΌΠ΅Π½ΡΠ°ΡΠΈΠΎΠ½Π½ΠΎΠ³ΠΎ ΠΎΠ±Π»ΠΈΠΊΠ° Π³ΡΠ±Ρ, ΠΏΡΠ΅Π΄ΠΏΠΎΠ»ΠΎΠΆΠΈΡΠ΅Π»ΡΠ½ΠΎ, ΠΈΠ³ΡΠ°ΡΡ ΠΏΡΠΎΡΠ΅ΡΡΡ Π²ΡΡΠ°ΠΈΠ²Π°Π½ΠΈΡ ΠΊΡΠΈΠΎΠ·ΠΎΠ»Ρ Π² ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠ΅ ΡΠ°Π·ΡΡΡΠ΅Π½ΠΈΡ ΠΎΠ±Π»Π°ΡΡΠ΅ΠΉ ΠΏΡΠΈΠΏΠ°ΠΉΠ½ΠΎΠ³ΠΎ Π»ΡΠ΄Π°. ΠΠ°Π½Π½ΡΠ΅ ΠΏΠΈΡΠΎΠ»ΠΈΠ·Π° ΠΈ Π°Π½Π°Π»ΠΈΠ· ΡΠ°ΡΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΡ Π½-Π°Π»ΠΊΠ°Π½ΠΎΠ² Π΄Π»Ρ ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠ½ΡΡ
ΠΎΡΠ°Π΄ΠΊΠΎΠ² ΡΠΊΠ°Π·ΡΠ²Π°ΡΡ Π½Π° ΡΠΌΠ΅ΡΠ°Π½Π½ΡΠΉ Π³Π΅Π½Π΅Π·ΠΈΡ ΠΎΡΠ³Π°Π½ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ Π²Π΅ΡΠ΅ΡΡΠ²Π° Π² ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠ½ΡΡ
ΠΎΡΠ°Π΄ΠΊΠ°Ρ
Ρ Π΄ΠΎΠΌΠΈΠ½ΠΈΡΡΡΡΠΈΠΌ Π²ΠΊΠ»Π°Π΄ΠΎΠΌ Π½Π°Π·Π΅ΠΌΠ½ΠΎΠ³ΠΎ ΠΎΡΠ³Π°Π½ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ Π²Π΅ΡΠ΅ΡΡΠ²Π° Π²ΡΡΠΎΠΊΠΎΠΉ ΡΡΠ΅ΠΏΠ΅Π½ΠΈ ΠΏΡΠ΅ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π½Π½ΠΎΡΡΠΈ ΠΈ Π²ΡΡΠΎΠΊΠΎΠ΅ ΡΠΎΠ΄Π΅ΡΠΆΠ°Π½ΠΈΠ΅ ΡΡΡΠ΄Π½ΠΎΡΠ°Π·Π»Π°Π³Π°Π΅ΠΌΡΡ
Π³ΡΠΌΠΈΠ½ΠΎΠ²ΡΡ
Π²Π΅ΡΠ΅ΡΡΠ² ΠΈ ΡΡΠ»ΡΠ²ΠΎΠΊΠΈΡΠ»ΠΎΡ. ΠΡΠΈΡΡΡΡΡΠ²ΠΈΠ΅ Π°Π²ΡΠΎΡ
ΡΠΎΠ½Π½ΠΎΠ³ΠΎ ΠΎΡΠ³Π°Π½ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ Π²Π΅ΡΠ΅ΡΡΠ²Π° ΠΎΡΡΠ°ΠΆΠ°Π΅Ρ Π²ΡΡΠΎΠΊΡΡ ΠΏΡΠΎΠ΄ΡΠΊΡΠΈΠ²Π½ΠΎΡΡΡ Π²ΠΎΠ΄ Π§Π°ΡΠ½ΡΠΊΠΎΠΉ Π³ΡΠ±Ρ.The relevance of the study is determined by the need to assess the regional characteristics of transport and transformation of organic matter in various sedimentation and biogeochemical environments on the East Siberian Arctic Shelf, in particular in the less studied and remoted East Siberian Sea. The main aim of the study is to determine the composition and sources of organic matter of bottom sediments of the Chaunskaya Bay (East Siberian Sea). Objects: 25 surface bottom sediments sampled along the transect from the coastal zone of the Chaunskaya Bay to the inner part of the East Siberian Sea shelf during the marine expedition on the R/V Β«Academician OparinΒ» in September-October 2020. Methods. Rock-Eval pyrolytic analysis was used to analyze groups of hydrocarbon compounds in organic matter from bottom sediments; the n-alkanes distribution was estimated based on the results of gas chromatography-mass-spectrometry. Grain size analysis was performed on a laser particle analyzer. Results. The composition of sedimentary material in the Chaunskaya Bay is mainly determined by the features of the underwater relief and gravity flows of the incoming terrigenous material - products of local thermal abrasion of the coastal zone (Ayon Island) and river alluvium in the southeastern part of the bay. A certain role in the formation of the sedimentary appearance of the bay is presumably played by the processes of cryosol thawing as a result of the destruction of fast ice areas. Pyrolysis data and analysis of the distribution of n-alkanes for surface sediments indicate a mixed genesis of organic matter in surface sediments with a dominant contribution of terrestrial organic matter of a high degree of transformation and a high content of hardly decomposable humic substances and fulvic acids. The presence of autochthonous organic matter reflects the high productivity of the Chaunskaya Bay waters
Geochemical specific of sediments at methane cold seep site on the Laptev Sea outer shelf
ΠΠΊΡΡΠ°Π»ΡΠ½ΠΎΡΡΡ. Π₯Π°ΡΠ°ΠΊΡΠ΅ΡΠ½ΠΎΠΉ ΠΎΡΠΎΠ±Π΅Π½Π½ΠΎΡΡΡΡ ΡΠ΅Π»ΡΡΠ° ΠΌΠΎΡΡ ΠΠ°ΠΏΡΠ΅Π²ΡΡ
ΡΠ²Π»ΡΠ΅ΡΡΡ Π½Π°Π»ΠΈΡΠΈΠ΅ ΡΡΠ°ΡΡΠΊΠΎΠ² ΠΌΠ°ΡΡΠΈΡΠΎΠ²Π°Π½Π½ΠΎΠΉ ΡΠ°Π·Π³ΡΡΠ·ΠΊΠΈ ΠΌΠ΅ΡΠ°Π½-ΡΠΎΠ΄Π΅ΡΠΆΠ°ΡΠΈΡ
ΡΠ»ΡΠΈΠ΄ΠΎΠ² Ρ ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠΈ ΠΌΠΎΡΡΠΊΠΎΠ³ΠΎ Π΄Π½Π° Π² Π²ΠΎΠ΄Π½ΡΡ ΡΠΎΠ»ΡΡ - ΠΌΠ΅ΡΠ°Π½ΠΎΠ²ΡΡ
ΡΠΈΠΏΠΎΠ². ΠΠ»ΡΡΠ΅Π²ΡΠΌΠΈ Π±ΠΈΠΎΠ³Π΅ΠΎΡ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠΈΠΌΠΈ ΠΏΡΠΎΡΠ΅ΡΡΠ°ΠΌΠΈ, ΠΏΡΠΎΡΠ΅ΠΊΠ°ΡΡΠΈΠΌΠΈ ΠΏΡΠΈ ΠΌΠΈΠ³ΡΠ°ΡΠΈΠΈ ΠΌΠ΅ΡΠ°Π½Π° ΡΠ΅ΡΠ΅Π· ΠΎΡΠ°Π΄ΠΎΡΠ½ΡΡ ΡΡΠ΅Π΄Ρ, ΡΠ²Π»ΡΡΡΡΡ Π°Π½Π°ΡΡΠΎΠ±Π½ΠΎΠ΅ ΠΎΠΊΠΈΡΠ»Π΅Π½ΠΈΠ΅ ΠΌΠ΅ΡΠ°Π½Π° ΠΈ Π±Π°ΠΊΡΠ΅ΡΠΈΠ°Π»ΡΠ½Π°Ρ ΡΡΠ»ΡΡΠ°ΡΡΠ΅Π΄ΡΠΊΡΠΈΡ. ΠΠΊΡΠΈΠ²Π½ΠΎΡΡΡ ΡΡΠΈΡ
ΠΏΡΠΎΡΠ΅ΡΡΠΎΠ² ΠΏΡΠΈΠ²ΠΎΠ΄ΠΈΡ ΠΊ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΡ ΠΎΠΊΠΈΡΠ»ΠΈΡΠ΅Π»ΡΠ½ΠΎ-Π²ΠΎΡΡΡΠ°Π½ΠΎΠ²ΠΈΡΠ΅Π»ΡΠ½ΡΡ
ΡΡΠ»ΠΎΠ²ΠΈΠΉ ΡΠ΅Π΄ΠΈΠΌΠ΅Π½ΡΠ°ΡΠΈΠΈ, ΡΡΠΎ Π²Π»ΠΈΡΠ΅Ρ Π½Π° Π±ΠΈΠΎΠ³Π΅ΠΎΡ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΡΠΈΠΊΠ»Ρ ΡΡΠ΄Π° ΡΠ΅Π΄ΠΎΠΊΡ-ΡΡΠ²ΡΡΠ²ΠΈΡΠ΅Π»ΡΠ½ΡΡ
ΡΠ»Π΅ΠΌΠ΅Π½ΡΠΎΠ². Π¦Π΅Π»Ρ: ΠΈΠ·ΡΡΠ΅Π½ΠΈΠ΅ Π²Π»ΠΈΡΠ½ΠΈΡ ΠΏΡΠΎΡΠ°ΡΠΈΠ²Π°ΡΡΠΈΡ
ΡΡ ΠΌΠ΅ΡΠ°Π½-ΡΠΎΠ΄Π΅ΡΠΆΠ°ΡΠΈΡ
ΡΠ»ΡΠΈΠ΄ΠΎΠ² Π½Π° Π³Π΅ΠΎΡ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΡΠΈΠΊΠ»Ρ ΠΆΠ΅Π»Π΅Π·Π°, ΡΠ³Π»Π΅ΡΠΎΠ΄Π° ΠΈ Π½Π΅ΠΊΠΎΡΠΎΡΡΡ
ΡΠ΅Π΄ΠΎΠΊΡ-ΡΡΠ²ΡΡΠ²ΠΈΡΠ΅Π»ΡΠ½ΡΡ
ΡΠ»Π΅ΠΌΠ΅Π½ΡΠΎΠ². ΠΠ±ΡΠ΅ΠΊΡ. ΠΡΠ»ΠΈ ΠΏΡΠΎΠ°Π½Π°Π»ΠΈΠ·ΠΈΡΠΎΠ²Π°Π½Ρ Π΄Π°Π½Π½ΡΠ΅ ΠΎ ΠΊΠΎΠ½ΡΠ΅Π½ΡΡΠ°ΡΠΈΡΡ
ΡΠ³Π»Π΅ΡΠΎΠ΄Π°, ΠΆΠ΅Π»Π΅Π·Π°, ΠΈ ΡΡΠ΄Π° ΡΠ΅Π΄ΠΎΠΊΡ-ΡΡΠ²ΡΡΠ²ΠΈΡΠ΅Π»ΡΠ½ΡΡ
ΡΠ»Π΅ΠΌΠ΅Π½ΡΠΎΠ² (Mn, Co, Ni, Cu, Zn, Cr, Ba, Mo, U) Π² ΡΡΠ΅Ρ
ΠΊΠ΅ΡΠ½Π°Ρ
Π΄ΠΎΠ½Π½ΡΡ
ΠΎΡΠ°Π΄ΠΊΠΎΠ², ΠΎΡΠΎΠ±ΡΠ°Π½Π½ΡΡ
Π½Π° Π²Π½Π΅ΡΠ½Π΅ΠΌ ΡΠ΅Π»ΡΡΠ΅ ΠΌΠΎΡΡ ΠΠ°ΠΏΡΠ΅Π²ΡΡ
. ΠΠ²Π° ΠΈΠ· ΡΡΠ΅Ρ
ΠΊΠ΅ΡΠ½ΠΎΠ² ΠΏΠΎΠ»ΡΡΠ΅Π½Ρ Π½Π° ΡΡΠ°ΡΡΠΊΠ°Ρ
Ρ Π·Π°ΡΠ΅Π³ΠΈΡΡΡΠΈΡΠΎΠ²Π°Π½Π½ΠΎΠΉ ΡΠ°Π·Π³ΡΡΠ·ΠΊΠΎΠΉ ΠΌΠ΅ΡΠ°Π½-ΡΠΎΠ΄Π΅ΡΠΆΠ°ΡΠΈΡ
ΡΠ»ΡΠΈΠ΄ΠΎΠ² ΠΈ ΡΠ°ΡΡΠΌΠ°ΡΡΠΈΠ²Π°Π»ΠΈΡΡ Π² ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ ΠΎΡΠ°Π΄ΠΊΠΎΠ², ΠΏΠΎΠ΄Π²Π΅ΡΠΆΠ΅Π½Π½ΡΡ
Π°Π½Π°ΡΡΠΎΠ±Π½ΠΎΠΌΡ ΠΎΠΊΠΈΡΠ»Π΅Π½ΠΈΡ ΠΌΠ΅ΡΠ°Π½Π°. ΠΠ΅ΡΠΎΠ΄Ρ: ΠΏΠΈΡΠΎΠ»ΠΈΠ· (Rock-Eval 6 Turbo, Vinci Technologies), ΡΠ΅Π½ΡΠ³Π΅Π½ΠΎΡΠ»ΡΠΎΡΠ΅ΡΡΠ΅Π½ΡΠ½ΡΠΉ Π°Π½Π°Π»ΠΈΠ· (HORIBA X-Ray Analytical Microscope XGT 7200), ΠΌΠ°ΡΡ-ΡΠΏΠ΅ΠΊΡΡΠΎΠΌΠ΅ΡΡΠΈΡ Ρ ΠΈΠ½Π΄ΡΠΊΡΠΈΠ²Π½ΠΎ-ΡΠ²ΡΠ·Π°Π½Π½ΠΎΠΉ ΠΏΠ»Π°Π·ΠΌΠΎΠΉ (ΠΠ‘Π-ΠΠ‘, ELAN DRC-e). Π Π΅Π·ΡΠ»ΡΡΠ°ΡΡ. Π‘ΠΎΠ΄Π΅ΡΠΆΠ°Π½ΠΈΡ TOC ΠΈ Fe Π² Π΄ΠΎΠ½Π½ΡΡ
ΠΎΡΠ°Π΄ΠΊΠ°Ρ
Π½Π΅ ΠΎΡΡΠ°ΠΆΠ°ΡΡ Π²Π»ΠΈΡΠ½ΠΈΡ Π°Π½Π°ΡΡΠΎΠ±Π½ΠΎΠ³ΠΎ ΠΎΠΊΠΈΡΠ»Π΅Π½ΠΈΡ Π½Π° ΠΈΡ
Π³Π΅ΠΎΡ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΡΠΈΠΊΠ»Ρ ΠΈ ΠΊΠΎΠ½ΡΡΠΎΠ»ΠΈΡΡΡΡΡΡ ΡΠΏΠ΅ΡΠΈΡΠΈΠΊΠΎΠΉ ΠΏΡΠΎΡΡΡΠ°Π½ΡΡΠ²Π΅Π½Π½ΠΎΠ³ΠΎ ΡΠ°ΡΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΡ ΠΏΠΎΡΠΎΠΊΠΎΠ² ΠΎΡΠ°Π΄ΠΎΡΠ½ΠΎΠ³ΠΎ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Π°. ΠΠΎ Π²ΡΠ΅Ρ
ΠΈΠ·ΡΡΠ΅Π½Π½ΡΡ
ΠΊΠ΅ΡΠ½Π°Ρ
ΠΎΡΠΌΠ΅ΡΠ°ΡΡΡΡ ΠΏΠΎΠ²ΡΡΠ΅Π½Π½ΡΠ΅ ΠΊΠΎΠ½ΡΠ΅Π½ΡΡΠ°ΡΠΈΠΈ Mn, ΠΏΡΠΈΡΡΠΎΡΠ΅Π½Π½ΡΠ΅ ΠΊ ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠ½ΠΎΠΌΡ Π³ΠΎΡΠΈΠ·ΠΎΠ½ΡΡ ΠΎΡΠ°Π΄ΠΊΠΎΠ². ΠΠ° ΡΡΠ°ΡΡΠΊΠ°Ρ
ΡΠ°Π·Π³ΡΡΠ·ΠΊΠΈ ΠΌΠ΅ΡΠ°Π½Π° ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠ½ΡΠΉ ΡΠ»ΠΎΠΉ Π΄ΠΎΠ½Π½ΡΡ
ΠΎΡΠ°Π΄ΠΊΠΎΠ² Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΠ·ΡΠ΅ΡΡΡ ΠΎΠ±ΠΎΠ³Π°ΡΠ΅Π½ΠΈΠ΅ΠΌ Mo, Ni ΠΈ Cr. ΠΠ·Π±ΠΈΡΠ°ΡΠ΅Π»ΡΠ½ΠΎΠ΅ ΠΎΠ±ΠΎΠ³Π°ΡΠ΅Π½ΠΈΡ ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠ½ΠΎΠ³ΠΎ ΡΠ»ΠΎΡ ΠΎΡΠ°Π΄ΠΊΠΎΠ² Π½Π΅ΠΊΠΎΡΠΎΡΡΠΌΠΈ ΡΠ΅Π΄ΠΎΠΊΡ-ΡΡΠ²ΡΡΠ²ΠΈΡΠ΅Π»ΡΠ½ΡΠΌΠΈ ΡΠ»Π΅ΠΌΠ΅Π½ΡΠ°ΠΌΠΈ ΠΌΠΎΠΆΠ΅Ρ Π±ΡΡΡ Π²ΡΠ·Π²Π°Π½ΠΎ ΠΌΠΈΠ³ΡΠ°ΡΠΈΠ΅ΠΉ ΠΌΠ΅ΡΠ°Π½-ΡΠΎΠ΄Π΅ΡΠΆΠ°ΡΠΈΡ
ΡΠ»ΡΠΈΠ΄ΠΎΠ², ΡΠΏΠΎΡΠΎΠ±ΡΡΠ²ΡΡΡΠΈΡ
ΠΏΠ΅ΡΠ΅Π½ΠΎΡΡ ΡΠ»Π΅ΠΌΠ΅Π½ΡΠΎΠ² Π² ΡΠ°ΡΡΠ²ΠΎΡΠ΅Π½Π½ΠΎΠΉ ΡΠΎΡΠΌΠ΅ ΠΈΠ· Π±ΠΎΠ»Π΅Π΅ Π³Π»ΡΠ±ΠΎΠΊΠΈΡ
Π³ΠΎΡΠΈΠ·ΠΎΠ½ΡΠΎΠ². Π‘ΠΎΡΠ±ΡΠΈΡ ΡΡΠΈΡ
ΡΠ»Π΅ΠΌΠ΅Π½ΡΠΎΠ² ΠΎΡΠ³Π°Π½ΠΈΡΠ΅ΡΠΊΠΈΠΌ Π²Π΅ΡΠ΅ΡΡΠ²ΠΎΠΌ ΠΈ ΠΎΠΊΠΈΡΠ»Π°ΠΌΠΈ/Π³ΠΈΠ΄ΡΠΎΠΊΠΈΡΠ»Π°ΠΌΠΈ Fe-Mn, ΠΏΠΎ-Π²ΠΈΠ΄ΠΈΠΌΠΎΠΌΡ, ΡΠ²Π»ΡΠ΅ΡΡΡ ΠΊΠ»ΡΡΠ΅Π²ΡΠΌ ΠΌΠ΅Ρ
Π°Π½ΠΈΠ·ΠΌΠΎΠΌ, ΠΊΠΎΠ½ΡΡΠΎΠ»ΠΈΡΡΡΡΠΈΠΌ ΠΎΡΠ°ΠΆΠ΄Π΅Π½ΠΈΠ΅ Mo, Ni ΠΈ Cr.Relevance. A specific feature of the Laptev Sea shelf is the sites of discharge of methane-containing fluids from the surface of the seabed into the water column (methane cold seeps). The key biogeochemical processes occurring during methane migration through the sedimentary environment are anaerobic oxidation of methane and bacterial sulfate reduction. The activity of these processes encourages a change in the redox conditions of sedimentation, which affects the biogeochemical cycles of some redox-sensitive elements. The aim of the research is to study the influence of methane-containing fluids on the geochemical cycles of iron, carbon and some redox-sensitive elements. Objects. The data of the concentrations of carbon, iron, and some of redox-sensitive elements (Mn, Co, Ni, Cu, Zn, Cr, Ba, Mo, U) in three bottom sediment cores sampled on the outer shelf of the Laptev Sea were analyzed. Two of the three cores were obtained at methane cold seep sites and were considered as sediments subject to anaerobic methane oxidation. Methods: pyrolysis (Rock-Eval 6 Turbo, Vinci Technologies), X-Ray analysis (HORIBA X-Ray Analytical Microscope XGT 7200), Inductively coupled plasma mass spectrometry (ICP-MS, ELAN DRC-e). Results. TOC and Fe contents in sediments do not reflect the impact of anaerobic oxidation on their geochemical cycles and controlled by the specifics of the spatial distribution of sedimentary material. In all the studied cores, there are elevated Mn concentrations confined to the surface layer of sediments. At methane cold seep sites, the surface layer of bottom sediments is characterized by enrichment in Mo, Ni and Cr. The selective enrichment of the surface layer of sediments with some redox-sensitive elements can be caused by the migration of methane-containing fluids, which facilitate the transport of elements in dissolved form from deeper horizons. The sorption of these elements by organic matter and Fe-Mn oxihydroxides appears to be the key mechanism controlling the deposition of Mo, Ni, and Cr
Methane seepage impact on authigenic pyrite morphology in sediments of the Laptev Sea continental slope
ΠΠΊΡΡΠ°Π»ΡΠ½ΠΎΡΡΡ. Π ΡΠ°Π±ΠΎΡΠ΅ ΠΏΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½Ρ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ ΠΈΠ·ΡΡΠ΅Π½ΠΈΡ ΠΌΠΎΡΡΠΎΠ»ΠΎΠ³ΠΈΠΈ ΠΈ ΡΠ°Π·ΠΌΠ΅ΡΠΎΠ² Π°ΡΡΠΈΠ³Π΅Π½Π½ΠΎΠ³ΠΎ ΠΏΠΈΡΠΈΡΠ°, ΠΏΡΠΈΡΡΡΡΡΠ²ΡΡΡΠ΅Π³ΠΎ Π² Π΄ΠΎΠ½Π½ΡΡ
ΠΎΡΠ°Π΄ΠΊΠ°Ρ
ΠΊΠ°ΠΊ Π² ΡΠ°ΡΡΠ΅ΡΠ½Π½ΠΎΠΌ Π²ΠΈΠ΄Π΅, ΡΠ°ΠΊ ΠΈ Π² Π°ΡΡΠΎΡΠΈΠ°ΡΠΈΠΈ Ρ ΠΊΠ°ΡΠ±ΠΎΠ½Π°ΡΠ½ΡΠΌΠΈ ΡΡΡΠΆΠ΅Π½ΠΈΡΠΌΠΈ. Π‘ ΠΏΠΎΠ·ΠΈΡΠΈΠΈ ΠΈΠ·ΡΡΠ΅Π½ΠΈΡ ΡΡΠ»ΠΎΠ²ΠΈΠΉ ΡΠ°Π½Π½Π΅Π³ΠΎ Π΄ΠΈΠ°Π³Π΅Π½Π΅Π·Π° Π°ΡΡΠΈΠ³Π΅Π½Π½ΡΠΉ ΠΏΠΈΡΠΈΡ ΡΡΠΈΡΠ°Π΅ΡΡΡ Π½Π°ΠΈΠ±ΠΎΠ»Π΅Π΅ Π²Π°ΠΆΠ½ΡΠΌ ΡΡΠ»ΡΡΠΈΠ΄Π½ΡΠΌ ΠΌΠΈΠ½Π΅ΡΠ°Π»ΠΎΠΌ ΠΆΠ΅Π»Π΅Π·Π° ΠΏΠΎ ΠΏΡΠΈΡΠΈΠ½Π΅ Π΅Π³ΠΎ Π½Π°ΠΈΠ±ΠΎΠ»ΡΡΠ΅ΠΉ Π΄ΠΈΠ°Π³Π΅Π½Π΅ΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΡΠ°Π±ΠΈΠ»ΡΠ½ΠΎΡΡΠΈ ΠΎΡΠ½ΠΎΡΠΈΡΠ΅Π»ΡΠ½ΠΎ Π΄ΡΡΠ³ΠΈΡ
ΡΡΠ»ΡΡΠΈΠ΄ΠΎΠ² ΠΆΠ΅Π»Π΅Π·Π°. Π Π°Π½Π΅Π΅ ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½Π½ΡΠ΅ ΠΌΠ½ΠΎΠ³ΠΎΡΠΈΡΠ»Π΅Π½Π½ΡΠ΅ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ ΠΌΠΎΡΡΠΎΠ»ΠΎΠ³ΠΈΠΈ ΠΈ ΡΠ°Π·ΠΌΠ΅ΡΠΎΠ² Π°ΡΡΠΈΠ³Π΅Π½Π½ΠΎΠ³ΠΎ ΠΏΠΈΡΠΈΡΠ° ΠΏΠΎΠΊΠ°Π·ΡΠ²Π°ΡΡ Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡΡ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΡ ΡΡΠΎΠΉ ΠΈΠ½ΡΠΎΡΠΌΠ°ΡΠΈΠΈ Π΄Π»Ρ ΠΎΡΠ΅Π½ΠΊΠΈ ΠΎΠΊΠΈΡΠ»ΠΈΡΠ΅Π»ΡΠ½ΠΎ-Π²ΠΎΡΡΡΠ°Π½ΠΎΠ²ΠΈΡΠ΅Π»ΡΠ½ΡΡ
ΡΡΠ»ΠΎΠ²ΠΈΠΉ ΠΎΡΠ°Π΄ΠΊΠΎΠ½Π°ΠΊΠΎΠΏΠ»Π΅Π½ΠΈΡ ΠΈ ΡΠ°Π½Π½Π΅Π³ΠΎ Π΄ΠΈΠ°Π³Π΅Π½Π΅Π·Π° ΠΊΠ°ΠΊ Π² ΡΠΎΠ²ΡΠ΅ΠΌΠ΅Π½Π½ΡΡ
, ΡΠ°ΠΊ ΠΈ Π² Π΄ΡΠ΅Π²Π½ΠΈΡ
ΠΎΡΠ°Π΄ΠΎΡΠ½ΡΡ
Π±Π°ΡΡΠ΅ΠΉΠ½Π°Ρ
. Π¦Π΅Π»ΡΡ ΡΠ°Π±ΠΎΡΡ ΡΠ²Π»ΡΠ»ΠΎΡΡ ΠΈΠ·ΡΡΠ΅Π½ΠΈΡ ΠΌΠΎΡΡΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΈ ΡΠ°Π·ΠΌΠ΅ΡΠ½ΡΡ
Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊ Π°ΡΡΠΈΠ³Π΅Π½Π½ΠΎΠ³ΠΎ ΠΏΠΈΡΠΈΡΠ° Π΄Π»Ρ ΠΎΡΠ΅Π½ΠΊΠΈ Π²Π»ΠΈΡΠ½ΠΈΡ ΡΡΠ»ΡΡΠ°Ρ-ΡΠΏΡΠ°Π²Π»ΡΠ΅ΠΌΠΎΠ³ΠΎ Π°Π½Π°ΡΡΠΎΠ±Π½ΠΎΠ³ΠΎ ΠΎΠΊΠΈΡΠ»Π΅Π½ΠΈΡ ΠΌΠ΅ΡΠ°Π½Π° Π½Π° ΡΡΠ»ΠΎΠ²ΠΈΡ ΡΠ°Π½Π½Π΅Π³ΠΎ Π΄ΠΈΠ°Π³Π΅Π½Π΅Π·Π°. ΠΠ΅ΡΠΎΠ΄Ρ: Π³ΠΈΠ΄ΡΠΎΠ°ΠΊΡΡΡΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ (Kongsberg EA600), ΡΠ΅Π½ΡΠ³Π΅Π½ΠΎΠ΄ΠΈΡΡΠ°ΠΊΡΠΈΠΎΠ½Π½ΡΠΉ Π°Π½Π°Π»ΠΈΠ· (Bruker D2 Phaser), ΡΠΊΠ°Π½ΠΈΡΡΡΡΠ°Ρ ΡΠ»Π΅ΠΊΡΡΠΎΠ½Π½Π°Ρ ΠΌΠΈΠΊΡΠΎΡΠΊΠΎΠΏΠΈΡ Ρ Π»ΠΎΠΊΠ°Π»ΡΠ½ΡΠΌ ΡΠ½Π΅ΡΠ³ΠΎΠ΄ΠΈΡΠΏΠ΅ΡΡΠΈΠΎΠ½Π½ΡΠΌ Π°Π½Π°Π»ΠΈΠ·ΠΎΠΌ (TESCAN VEGA 3 SBU). ΠΡΠ½ΠΎΠ²Π½ΡΠ΅ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ. Π ΠΌΠΎΡΡΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΎΠΌ ΠΎΡΠ½ΠΎΡΠ΅Π½ΠΈΠΈ ΠΏΠΈΡΠΈΡ ΠΏΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½ ΠΈΠ΄ΠΈΠΎΠΌΠΎΡΡΠ½ΡΠΌΠΈ ΠΈ Π³ΠΈΠΏΠΈΠ΄ΠΈΠΎΠΌΠΎΡΡΠ½ΡΠΌΠΈ ΠΊΡΠΈΡΡΠ°Π»Π»Π°ΠΌΠΈ, ΡΡΠ°ΠΌΠ±ΠΎΠΈΠ΄Π°ΠΌΠΈ ΠΈ ΠΈΡ
ΡΠΊΠΎΠΏΠ»Π΅Π½ΠΈΡΠΌΠΈ, ΡΠ°Π΄ΠΈΠ°Π»ΡΠ½ΡΠΌΠΈ Π½Π°ΡΠΎΡΡΠ°ΠΌΠΈ, Π° ΡΠ°ΠΊΠΆΠ΅ ΡΡΠ΅ΡΠΆΠ½Π΅Π²ΠΈΠ΄Π½ΡΠΌΠΈ Π°Π³ΡΠ΅Π³Π°ΡΠ°ΠΌΠΈ. Π‘ΡΠ΅Π΄Π½ΠΈΠΉ Π΄ΠΈΠ°ΠΌΠ΅ΡΡ ΡΡΠ°ΠΌΠ±ΠΎΠΈΠ΄ΠΎΠ², Π° ΡΠ°ΠΊΠΆΠ΅ Π²ΡΡΠΎΠΊΠΎΠ΅ Π·Π½Π°ΡΠ΅Π½ΠΈΠ΅ ΡΡΠ°Π½Π΄Π°ΡΡΠ½ΠΎΠ³ΠΎ ΠΎΡΠΊΠ»ΠΎΠ½Π΅Π½ΠΈΡ Π² ΠΎΠ±Π΅ΠΈΡ
ΡΠ°ΡΡΠΌΠ°ΡΡΠΈΠ²Π°Π΅ΠΌΡΡ
Π²ΡΠ±ΠΎΡΠΊΠ°Ρ
ΡΠ²ΠΈΠ΄Π΅ΡΠ΅Π»ΡΡΡΠ²ΡΠ΅Ρ ΠΎ Π΄ΠΈΠ°Π³Π΅Π½Π΅ΡΠΈΡΠ΅ΡΠΊΠΎΠΌ ΠΏΡΠΎΠΈΡΡ
ΠΎΠΆΠ΄Π΅Π½ΠΈΠΈ ΠΏΠΈΡΠΈΡΠ°. Π‘ΡΠ»ΡΡΠ°Ρ-ΡΠΏΡΠ°Π²Π»ΡΠ΅ΠΌΠΎΠ΅ Π°Π½Π°ΡΡΠΎΠ±Π½ΠΎΠ΅ ΠΎΠΊΠΈΡΠ»Π΅Π½ΠΈΠ΅ ΠΌΠ΅ΡΠ°Π½Π° ΡΠ²Π»ΡΠ΅ΡΡΡ Π΄ΠΎΠΌΠΈΠ½ΠΈΡΡΡΡΠΈΠΌ ΠΏΡΠΎΡΠ΅ΡΡΠΎΠΌ, ΠΊΠΎΠ½ΡΡΠΎΠ»ΠΈΡΡΡΡΠΈΠΌ ΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ ΡΡΠ»ΡΡΠΈΠ΄ΠΎΠ² ΠΆΠ΅Π»Π΅Π·Π°, ΡΡΠΎ ΠΏΠΎΠ΄ΡΠ²Π΅ΡΠΆΠ΄Π°Π΅ΡΡΡ Π½Π°Π»ΠΈΡΠΈΠ΅ΠΌ Π΄ΠΎΡΡΠ°ΡΠΎΡΠ½ΠΎ ΠΊΡΡΠΏΠ½ΡΡ
ΡΡΠ°ΠΌΠ±ΠΎΠΈΠ΄ΠΎΠ² Π΄ΠΈΠ°ΠΌΠ΅ΡΡΠΎΠΌ Π΄ΠΎ 49 ΠΌΠΊΠΌ. ΠΠ°Π±Π»ΡΠ΄Π°Π΅ΠΌΠΎΠ΅ ΡΠ°Π·Π½ΠΎΠΎΠ±ΡΠ°Π·ΠΈΠ΅ ΠΌΠΎΡΡΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠΎΡΠΌ ΠΏΠΈΡΠΈΡΠ° ΠΌΠΎΠΆΠ΅Ρ ΠΎΡΡΠ°ΠΆΠ°ΡΡ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ Π΄ΠΈΠ°Π³Π΅Π½Π΅ΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΡΠ΅Π΄Ρ Ρ ΡΠ΅ΡΠ΅Π½ΠΈΠ΅ΠΌ Π²ΡΠ΅ΠΌΠ΅Π½ΠΈ, Π²ΡΠ·Π²Π°Π½Π½ΠΎΠ΅ Π²Π°ΡΠΈΠ°ΡΠΈΠ²Π½ΠΎΡΡΡΡ ΠΏΠΎΡΠΎΠΊΠ° ΠΌΠ΅ΡΠ°Π½-ΡΠΎΠ΄Π΅ΡΠΆΠ°ΡΠΈΡ
ΡΠ»ΡΠΈΠ΄ΠΎΠ².Relevance. The paper presents the results of studying the morphology and size distribution of authigenic pyrite, both present in sediments and in carbonate nodules. From the point of view of studying the conditions of early diagenesis, authigenic pyrite is considered the most important iron sulfide mineral due to its greatest diagenetic stability relative to other iron sulfides. Numerous previous studies of the morphology and size of authigenic pyrite show the possibility of using this information to assess the redox conditions of sedimentation and early diagenesis in both modern and ancient sedimentary basins. The aim of the research was to study the morphology and size distribution of authigenic pyrite to assess the effect of sulfate-controlled anaerobic oxidation of methane on the conditions of early diagenesis. Methods: field hydroacoustic researches (Kongsberg EA600), X-ray diffraction (Bruker D2 Phaser), scanning electron microscopy with local energy dispersive analysis (TESCAN VEGA 3 SBU). Results. Morphologically, pyrite is represented by idiomorphic and hypidiomorphic crystals, framboids and their clusters, radial outgrowths, and also rod like aggregates. The mean diameter of framboids, as well as the high value of standard deviation, indicate the diagenetic origin of pyrite. Sulfate-driven anaerobic oxidation of methane is the dominant process that controls the formation of iron sulfides, which is confirmed by the presence of fairly large framboids up to 49 ΞΌm in diameter. The observed diversity of pyrite morphology may reflect the change in the diagenetic environment over time, due to the variability of the flow of methane-bearing fluids
Authigenic minerals in the bottom sediments from seeps of the Laptev Sea
ΠΠ΅ΡΠ°Π½ΠΎΠ²ΡΠ΅ ΡΠΈΠΏΡ ΡΠ²Π»ΡΡΡΡΡ ΡΠΈΡΠΎΠΊΠΎ ΡΠ°ΡΠΏΡΠΎΡΡΡΠ°Π½Π΅Π½Π½ΡΠΌ ΡΠ²Π»Π΅Π½ΠΈΠ΅ΠΌ, Π½Π°Π±Π»ΡΠ΄Π°Π΅ΠΌΡΠΌ Π½Π° ΡΠ΅Π»ΡΡΠ°Ρ
ΠΈ ΠΊΠΎΠ½ΡΠΈΠ½Π΅Π½ΡΠ°Π»ΡΠ½ΡΡ
ΡΠΊΠ»ΠΎΠ½Π°Ρ
Π²Π½ΡΡΡΠ΅Π½Π½ΠΈΡ
ΠΈ ΠΎΠΊΡΠ°ΠΈΠ½Π½ΡΡ
ΠΌΠΎΡΠ΅ΠΉ ΠΏΠΎ Π²ΡΠ΅ΠΌΡ ΠΌΠΈΡΡ, Π² ΡΠΎΠΌ ΡΠΈΡΠ»Π΅ ΠΈ Π² ΠΌΠΎΡΠ΅ ΠΠ°ΠΏΡΠ΅Π²ΡΡ
. ΠΠ»ΡΡΠ΅Π²ΡΠΌΠΈ Π±ΠΈΠΎΠ³Π΅ΠΎΡ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠΈΠΌΠΈ ΠΏΡΠΎΡΠ΅ΡΡΠ°ΠΌΠΈ, ΠΏΡΠΎΡΠ΅ΠΊΠ°ΡΡΠΈΠΌΠΈ Π² Π΄ΠΎΠ½Π½ΡΡ
ΠΎΡΠ°Π΄ΠΊΠ°Ρ
ΡΡΠΈΡ
ΡΠ°ΠΉΠΎΠ½ΠΎΠ², ΡΠ²Π»ΡΡΡΡΡ Π°Π½Π°ΡΡΠΎΠ±Π½ΠΎΠ΅ ΠΎΠΊΠΈΡΠ»Π΅Π½ΠΈΠ΅ ΠΌΠ΅ΡΠ°Π½Π° Π² ΡΠΎΡΠ΅ΡΠ°Π½ΠΈΠΈ Ρ Π±Π°ΠΊΡΠ΅ΡΠΈΠ°Π»ΡΠ½ΠΎΠΉ ΡΡΠ»ΡΡΠ°ΡΡΠ΅Π΄ΡΠΊΡΠΈΠ΅ΠΉ. ΠΠ±Π° ΡΡΠΈΡ
ΠΏΡΠΎΡΠ΅ΡΡΠ° ΠΊΠΎΠ½ΡΡΠΎΠ»ΠΈΡΡΡΡ ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π½ΠΈΠ΅ ΡΠΏΠ΅ΡΠΈΡΠΈΡΠ΅ΡΠΊΠΎΠΉ Π°ΡΡΠΈΠ³Π΅Π½Π½ΠΎΠΉ ΠΌΠΈΠ½Π΅ΡΠ°Π»ΠΈΠ·Π°ΡΠΈΠΈ. Π¦Π΅Π»ΡΡ Π½Π°ΡΡΠΎΡΡΠ΅ΠΉ ΡΠ°Π±ΠΎΡΡ ΡΠ²Π»ΡΠ»ΠΎΡΡ ΠΈΠ·ΡΡΠ΅Π½ΠΈΠ΅ Π°ΡΡΠΈΠ³Π΅Π½Π½ΡΡ
ΠΌΠΈΠ½Π΅ΡΠ°Π»ΠΎΠ² Π΄ΠΎΠ½Π½ΡΡ
ΠΎΡΠ°Π΄ΠΊΠΎΠ² Ρ Π°Π½ΠΎΠΌΠ°Π»ΡΠ½ΠΎ Π²ΡΡΠΎΠΊΠΈΠΌΠΈ ΠΊΠΎΠ½ΡΠ΅Π½ΡΡΠ°ΡΠΈΡΠΌΠΈ ΠΌΠ΅ΡΠ°Π½Π°, ΠΎΡΠΎΠ±ΡΠ°Π½Π½ΡΡ
Π½Π° Π΄Π²ΡΡ
ΡΠΈΠΏΠΎΠ²ΡΡ
ΡΡΠ°ΡΡΠΊΠ°Ρ
Π² ΡΠ΅Π²Π΅ΡΠΎ-Π²ΠΎΡΡΠΎΡΠ½ΠΎΠΉ ΡΠ°ΡΡΠΈ ΠΌΠΎΡΡ ΠΠ°ΠΏΡΠ΅Π²ΡΡ
, Π΄Π»Ρ ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΡ ΠΏΡΠΈΠ·Π½Π°ΠΊΠΎΠ² ΠΈΡ
ΠΈΠ΄Π΅Π½ΡΠΈΡΠΈΠΊΠ°ΡΠΈΠΈ Π² Π΄ΡΠ΅Π²Π½ΠΈΡ
ΠΎΡΠ°Π΄ΠΎΡΠ½ΡΡ
ΠΏΠΎΡΠΎΠ΄Π°Ρ
. ΠΡΠΈΠ²Π΅Π΄Π΅Π½Ρ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ Π»ΠΈΡΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΈ ΠΌΠΈΠ½Π΅ΡΠ°Π»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΉ Π΄ΠΎΠ½Π½ΡΡ
ΠΎΡΠ°Π΄ΠΊΠΎΠ². ΠΡΠ»ΠΎ ΡΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ, ΡΡΠΎ ΠΎΡΠ½ΠΎΠ²Π½ΡΠΌΠΈ Π°ΡΡΠΈΠ³Π΅Π½Π½ΡΠΌΠΈ ΠΌΠΈΠ½Π΅ΡΠ°Π»Π°ΠΌΠΈ Π² ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½Π½ΡΡ
ΠΎΠ±ΡΠ°Π·ΡΠ°Ρ
Π΄ΠΎΠ½Π½ΡΡ
ΠΎΡΠ°Π΄ΠΊΠΎΠ², ΠΎΡΠΎΠ±ΡΠ°Π½Π½ΡΡ
Ρ Π΄Π²ΡΡ
ΡΠΈΠΏΠΎΠ²ΡΡ
ΡΡΠ°ΡΡΠΊΠΎΠ² Π² ΡΠ΅Π²Π΅ΡΠΎ-Π²ΠΎΡΡΠΎΡΠ½ΠΎΠΉ ΡΠ°ΡΡΠΈ ΠΌΠΎΡΡ ΠΠ°ΠΏΡΠ΅Π²ΡΡ
, ΡΠ²Π»ΡΡΡΡΡ ΠΌΠ°Π³Π½Π΅Π·ΠΈΠ°Π»ΡΠ½ΡΠΉ ΠΊΠ°Π»ΡΡΠΈΡ, Π³ΠΈΠΏΡ ΠΈ ΠΏΠΈΡΠΈΡ. Π Π°Π·Π½Π°Ρ ΡΠΏΠ΅ΡΠΈΡΠΈΠΊΠ° Π°ΡΡΠΈΠ³Π΅Π½Π½ΠΎΠΉ ΠΌΠΈΠ½Π΅ΡΠ°Π»ΠΈΠ·Π°ΡΠΈΠΈ, ΠΏΡΠ΅Π΄ΠΏΠΎΠ»ΠΎΠΆΠΈΡΠ΅Π»ΡΠ½ΠΎ, ΡΠΊΠ°Π·ΡΠ²Π°Π΅Ρ Π½Π° ΡΠ°Π·Π»ΠΈΡΠΈΡ Π² ΡΠ΅ΠΆΠΈΠΌΠ°Ρ
ΠΌΠΈΠ³ΡΠ°ΡΠΈΠΈ ΠΌΠ΅ΡΠ°Π½-ΡΠΎΠ΄Π΅ΡΠΆΠ°ΡΠΈΡ
ΡΠ»ΡΠΈΠ΄ΠΎΠ² Π½Π° ΡΡΠΈΡ
ΡΡΠ°ΡΡΠΊΠ°Ρ
. ΠΡΠ΅ΠΌΠ΅Π½Π½ΠΎΠ΅ ΡΠ½ΠΈΠΆΠ΅Π½ΠΈΠΈ ΠΈΠ½ΡΠ΅Π½ΡΠΈΠ²Π½ΠΎΡΡΠΈ ΠΏΡΠΎΡΠ°ΡΠΈΠ²Π°Π½ΠΈΡ ΠΌΠ΅ΡΠ°Π½Π° Π² ΠΏΡΠ΅Π΄Π΅Π»Π°Ρ
Β«Π²ΠΎΡΡΠΎΡΠ½ΠΎΠ³ΠΎ ΡΠΈΠΏΠ°Β» ΡΠΏΠΎΡΠΎΠ±ΡΡΠ²ΠΎΠ²Π°Π»ΠΎ Π½Π°ΡΡΡΠ΅Π½ΠΈΡ ΠΏΠΎΡΠΎΠ²ΠΎΠΉ Π²ΠΎΠ΄Ρ ΠΈΠΎΠ½Π°ΠΌΠΈ SO[4]{2-} ΠΈ Ca{2+} ΠΈ, ΠΊΠ°ΠΊ ΡΠ»Π΅Π΄ΡΡΠ²ΠΈΠ΅, ΠΎΡΠ°ΠΆΠ΄Π΅Π½ΠΈΡ Π³ΠΈΠΏΡΠ°. ΠΠ»ΠΈΠ·ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠ½ΠΎΠ΅ ΠΏΠΎΠ»ΠΎΠΆΠ΅Π½ΠΈΠ΅ ΡΡΠ»ΡΡΠ°Ρ-ΠΌΠ΅ΡΠ°Π½ΠΎΠ²ΠΎΠΉ ΡΡΠ°Π½Π·ΠΈΡΠ½ΠΎΠΉ Π·ΠΎΠ½Ρ Π² Β«Π·Π°ΠΏΠ°Π΄Π½ΠΎΠΌ ΡΠΈΠΏΠ΅Β», ΠΎΠ±ΡΡΠ»ΠΎΠ²Π»Π΅Π½Π½ΠΎΠ΅ Π²ΡΡΠΎΠΊΠΈΠΌΠΈ ΠΏΠΎΡΠΎΠΊΠ°ΠΌΠΈ ΠΌΠ΅ΡΠ°Π½Π°, Π±Π»Π°Π³ΠΎΠΏΡΠΈΡΡΡΡΠ²ΠΎΠ²Π°Π»ΠΎ ΠΎΡΠ°ΠΆΠ΄Π΅Π½ΠΈΡ ΠΌΠ°Π³Π½Π΅Π·ΠΈΠ°Π»ΡΠ½ΠΎΠ³ΠΎ ΠΊΠ°Π»ΡΡΠΈΡΠ° Π² Π²Π΅ΡΡ
Π½ΠΈΡ
Π³ΠΎΡΠΈΠ·ΠΎΠ½ΡΠ°Ρ
Π΄ΠΎΠ½Π½ΡΡ
ΠΎΡΠ°Π΄ΠΊΠΎΠ². ΠΡΠΈΡΡΡΡΡΠ²ΠΈΠ΅ ΠΏΠΈΡΠΈΡΠ° Π² ΠΎΡΠ°Π΄ΠΊΠ°Ρ
ΠΊΠ°ΠΊ Π²ΠΎΡΡΠΎΡΠ½ΠΎΠ³ΠΎ, ΡΠ°ΠΊ Π·Π°ΠΏΠ°Π΄Π½ΠΎΠ³ΠΎ ΡΠΈΠΏΠΎΠ²ΡΡ
ΡΡΠ°ΡΡΠΊΠΎΠ² ΡΠ²Π»ΡΠ΅ΡΡΡ ΡΠ²ΠΈΠ΄Π΅ΡΠ΅Π»ΡΡΡΠ²ΠΎΠΌ Π°ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ ΠΏΡΠΎΡΠ΅ΡΡΠ° Π±Π°ΠΊΡΠ΅ΡΠΈΠ°Π»ΡΠ½ΠΎΠΉ ΡΡΠ»ΡΡΠ°Ρ-ΡΠ΅Π΄ΡΠΊΡΠΈΠΈ ΠΏΡΠΈ Π°Π½Π°ΡΡΠΎΠ±Π½ΠΎΠΌ ΠΎΠΊΠΈΡΠ»Π΅Π½ΠΈΠΈ ΠΌΠ΅ΡΠ°Π½Π°.Methane seeps is a widespread phenomenon observed on the shelves and continental slopes of inland and border seas around the world, including the Laptev Sea. Key biogeochemical processes occurring in the bottom sediments of these areas are the anaerobic oxidation of methane in combination with bacterial sulfate reduction. Both of these processes control the formation of specific autigenic mineralization. The aim of this work was to study authigenic minerals of bottom sediments with abnormally high concentrations of methane taken from two seeps in the north-eastern part of the Laptev Sea to determine the signs of their identification in ancient sedimentary rocks. The paper presents the results of lithological and mineralogical studies of bottom sediments. It was found that magnesium calcite, gypsum and pyrite are the main authigenic minerals in the studied samples of bottom sediments taken from two seeps in the north-eastern part of the Laptev Sea. The different specifics of authigenic mineralization indicate differences in conditions of migration of methane-containing fluids in these areas, presumably. Temporary decrease in the rate of methane seepage within the Β«eastern seepΒ» contributed to the saturation of pore water with SO[4]{2-} and Ca{2+} and, as a consequence, gypsum deposition. The near-surface position of the sulfate-methane transition zone in the Β«western seepΒ» due to high methane flows favored the precipitation of magnesian calcite in the upper horizons of bottom sediments. The presence of pyrite in sediments of eastern and western seep is evidence of the activity of the bacterial sulfate reduction during anaerobic methane oxidation
Geochemical characteristics of organic matter in bottom sediments in Ivashkina Lagoon (Bykovsky Peninsula, Laptev Sea)
ΠΠΊΡΡΠ°Π»ΡΠ½ΠΎΡΡΡ. Π Π½Π°ΡΡΠΎΡΡΠ΅Π΅ Π²ΡΠ΅ΠΌΡ Π΄Π»Ρ ΠΏΡΠΎΠ³Π½ΠΎΠ·ΠΈΡΠΎΠ²Π°Π½ΠΈΡ Π³Π»ΠΎΠ±Π°Π»ΡΠ½ΡΡ
ΠΊΠ»ΠΈΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΠΉ ΠΎΡΠΎΠ±ΠΎΠ΅ Π·Π½Π°ΡΠ΅Π½ΠΈΠ΅ ΠΈΠΌΠ΅Π΅Ρ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠ΅ ΠΏΡΠΈΡΠΎΠ΄Π½ΡΡ
ΠΌΠ΅Ρ
Π°Π½ΠΈΠ·ΠΌΠΎΠ² ΡΡΠ½ΠΊΡΠΈΠΎΠ½ΠΈΡΠΎΠ²Π°Π½ΠΈΡ Π°ΡΠΊΡΠΈΡΠ΅ΡΠΊΠΎΠΉ Π±ΠΈΠΎΠ³Π΅ΠΎΡ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΠΊΠΎΡΠΈΡΡΠ΅ΠΌΡ Ρ ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ΠΌ ΡΠ°Π·Π»ΠΈΡΠ½ΡΡ
ΠΌΠ΅ΡΠΎΠ΄ΠΎΠ² ΠΈ Π°Π½Π°Π»ΠΈΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΏΠΎΠ΄Ρ
ΠΎΠ΄ΠΎΠ². ΠΡΠ³Π°Π½ΠΈΡΠ΅ΡΠΊΠΎΠ΅ Π²Π΅ΡΠ΅ΡΡΠ²ΠΎ ΡΠΎΠ²ΡΠ΅ΠΌΠ΅Π½Π½ΡΡ
Π΄ΠΎΠ½Π½ΡΡ
ΠΎΡΠ°Π΄ΠΊΠΎΠ², Π°ΠΊΠΊΡΠΌΡΠ»ΠΈΡΡΡΡΠ΅Π΅ Π³Π΅ΡΠ΅ΡΠΎΠ³Π΅Π½Π½ΡΠ΅ ΡΠΈΠ³Π½Π°Π»Ρ ΡΠ°Π·Π»ΠΈΡΠ½ΡΡ
ΠΏΡΠΎΡΠ΅ΡΡΠΎΠ² ΡΡΠ°Π½ΡΠΏΠΎΡΡΠ° ΠΈ ΡΡΠ°Π½ΡΡΠΎΡΠΌΠ°ΡΠΈΠΈ ΡΠ³Π»Π΅ΡΠΎΠ΄Π°, ΡΠ²Π»ΡΠ΅ΡΡΡ ΠΈΠ½Π΄ΠΈΠΊΠ°ΡΠΎΡΠΎΠΌ ΡΠ½ΠΈΠΊΠ°Π»ΡΠ½ΡΡ
ΠΎΡΠΎΠ±Π΅Π½Π½ΠΎΡΡΠ΅ΠΉ ΡΠ΅Π΄ΠΈΠΌΠ΅Π½ΡΠΎΠ³Π΅Π½Π΅Π·Π° ΠΈ Π΄ΠΈΠ°Π³Π΅Π½Π΅Π·Π° ΠΎΡΠ°Π΄ΠΊΠΎΠ². ΠΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ Π½Π°Π±ΠΎΡΠΎΠ² Π²ΡΡΠΎΠΊΠΎΡΠΎΡΠ½ΡΡ
Π³Π΅ΠΎΡ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΈΠ½ΡΡΡΡΠΌΠ΅Π½ΡΠΎΠ² ΠΏΠΎΠ·Π²ΠΎΠ»ΡΠ΅Ρ ΠΏΠΎΠ»ΡΡΠΈΡΡ Π²Π°ΠΆΠ½ΡΡ ΠΈΠ½ΡΠΎΡΠΌΠ°ΡΠΈΡ ΠΎ Π²ΠΊΠ»Π°Π΄Π΅ Π°Π»Π»ΠΎΡ
ΡΠΎΠ½Π½ΠΎΠΉ ΠΈ Π°Π²ΡΠΎΡ
ΡΠΎΠ½Π½ΠΎΠΉ ΠΊΠΎΠΌΠΏΠΎΠ½Π΅Π½ΡΡ Π² ΡΠΎΡΡΠ°Π² ΠΎΡΠ³Π°Π½ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ Π²Π΅ΡΠ΅ΡΡΠ²Π° ΠΈ ΡΠ°ΠΊΠΈΠΌ ΠΎΠ±ΡΠ°Π·ΠΎΠΌ Π²Π½Π΅ΡΡΠΈ Π²ΠΊΠ»Π°Π΄ Π² ΠΏΠΎΠ½ΠΈΠΌΠ°Π½ΠΈΠ΅ ΠΎΡΠ΄Π΅Π»ΡΠ½ΡΡ
ΡΠ»Π΅ΠΌΠ΅Π½ΡΠΎΠ² ΡΠΎΠ²ΡΠ΅ΠΌΠ΅Π½Π½ΠΎΠ³ΠΎ Π°ΡΠΊΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠΈΠΊΠ»Π° ΡΠ³Π»Π΅ΡΠΎΠ΄Π°. Π¦Π΅Π»Ρ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ Π·Π°ΠΊΠ»ΡΡΠ°Π΅ΡΡΡ Π² ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΠΈ Π»ΠΈΡΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΈ ΠΎΡΠ³Π°Π½ΠΎ-Π³Π΅ΠΎΡ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΎΡΠΎΠ±Π΅Π½Π½ΠΎΡΡΠ΅ΠΉ ΠΎΡΠ»ΠΎΠΆΠ΅Π½ΠΈΠΉ, Π½Π°ΠΊΠΎΠΏΠ»Π΅Π½Π½ΡΡ
Π² ΡΠΏΠ΅ΡΠΈΡΠΈΡΠ΅ΡΠΊΠΈΡ
Π»Π°Π³ΡΠ½Π½ΡΡ
ΡΡΠ»ΠΎΠ²ΠΈΡΡ
ΠΏΡΠΈΠ±ΡΠ΅ΠΆΠ½ΠΎΠΉ ΡΠ°ΡΡΠΈ ΠΌΠΎΡΡ ΠΠ°ΠΏΡΠ΅Π²ΡΡ
(ΠΠ²Π°ΡΠΊΠΈΠ½Π° Π»Π°Π³ΡΠ½Π°, ΠΡΠΊΠΎΠ²ΡΠΊΠΈΠΉ ΠΏΠΎΠ»ΡΠΎΡΡΡΠΎΠ²). ΠΠ°ΡΠ΅ΡΠΈΠ°Π»Ρ ΠΈ ΠΌΠ΅ΡΠΎΠ΄Ρ. ΠΠ±ΡΠ΅ΠΊΡΠΎΠΌ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ Π±ΡΠ» Π²ΡΠ±ΡΠ°Π½ ΡΠ°Π·ΡΠ΅Π· ΠΎΡΠ°Π΄ΠΊΠΎΠ² Π² ΡΠ°ΠΉΠΎΠ½Π΅ Π΄Π΅Π»ΡΡΡ ΡΠ΅ΠΊΠΈ ΠΠ΅Π½Π°. ΠΠ»Ρ ΠΎΡΠ΅Π½ΠΊΠΈ ΠΈΠ·ΠΌΠ΅Π½ΡΠΈΠ²ΠΎΡΡΠΈ ΠΌΠΎΠ»Π΅ΠΊΡΠ»ΡΡΠ½ΠΎΠ³ΠΎ ΡΠΎΡΡΠ°Π²Π° ΠΎΡΠ³Π°Π½ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ Π²Π΅ΡΠ΅ΡΡΠ²Π° Π² ΠΏΡΠΎΡΠ΅ΡΡΠ΅ Π½Π°ΠΊΠΎΠΏΠ»Π΅Π½ΠΈΡ ΡΠΎΠ»Ρ ΠΎΡΠ°Π΄ΠΊΠΎΠ² Π±ΡΠ» ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ 18-ΠΌΠ΅ΡΡΠΎΠ²ΡΠΉ ΠΈΠ½ΡΠ΅ΡΠ²Π°Π» ΠΊΠ΅ΡΠ½Π° ΡΠΊΠ²Π°ΠΆΠΈΠ½Ρ VD-13, ΠΏΡΠΎΠ±ΡΡΠ΅Π½Π½ΠΎΠΉ Π² ΡΠ΅Π½ΡΡΠ°Π»ΡΠ½ΠΎΠΉ ΡΠ°ΡΡΠΈ ΠΠ²Π°ΡΠΊΠΈΠ½ΠΎΠΉ Π»Π°Π³ΡΠ½Ρ Π²ΠΎ Π²ΡΠ΅ΠΌΡ Π²Π΅ΡΠ΅Π½Π½Π΅ΠΉ Π°ΡΠΊΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΠΊΡΠΏΠ΅Π΄ΠΈΡΠΈΠΈ 2013 Π³. ΠΠ»Ρ ΠΎΠ±ΡΠ°Π·ΡΠΎΠ² Π±ΡΠ»ΠΈ ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½Ρ ΠΈΡ
Π³ΡΠ°Π½ΡΠ»ΠΎΠΌΠ΅ΡΡΠΈΡΠ΅ΡΠΊΠΈΠ΅ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊΠΈ, Π° ΡΠ°ΠΊΠΆΠ΅ ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½Ρ ΠΏΠΈΡΠΎΠ»ΠΈΡΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΠΈ Ρ
ΡΠΎΠΌΠ°ΡΠΎ-ΠΌΠ°ΡΡ-ΡΠΏΠ΅ΠΊΡΡΠΎΠΌΠ΅ΡΡΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ. ΠΠΎΠΊΠ°Π·Π°Π½ΠΎ, ΡΡΠΎ ΠΏΠΎΠ²ΡΡΠ΅Π½Π½ΠΎΠ΅ ΡΠΎΠ΄Π΅ΡΠΆΠ°Π½ΠΈΠ΅ ΠΎΡΠ³Π°Π½ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠ³Π»Π΅ΡΠΎΠ΄Π° (Π‘ΠΎΡΠ³) Π² ΡΠ°Π·ΡΠ΅Π·Π΅ ΠΏΡΠΈΡΡΠΎΡΠ΅Π½ΠΎ ΠΊ ΠΏΠ΅Π»ΠΈΡΠΎΠ²ΠΎΠΉ ΡΡΠ°ΠΊΡΠΈΠΈ ΠΎΡΠ°Π΄ΠΊΠΎΠ². Π Π°ΡΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΠ΅ Π½-Π°Π»ΠΊΠ°Π½ΠΎΠ² Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΠ·ΡΠ΅ΡΡΡ Π΄ΠΎΠΌΠΈΠ½ΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ Π²ΡΡΠΎΠΊΠΎΠΌΠΎΠ»Π΅ΠΊΡΠ»ΡΡΠ½ΡΡ
Π½Π΅ΡΠ΅ΡΠ½ΡΡ
Π³ΠΎΠΌΠΎΠ»ΠΎΠ³ΠΎΠ², ΡΡΠΎ ΡΠΊΠ°Π·ΡΠ²Π°Π΅Ρ Π½Π° ΠΏΠΎΠ²ΡΠ΅ΠΌΠ΅ΡΡΠ½ΠΎ ΠΎΠΏΡΠ΅Π΄Π΅Π»ΡΡΡΠΈΠΉ Π²ΠΊΠ»Π°Π΄ Π²ΡΡΡΠ΅ΠΉ Π½Π°Π·Π΅ΠΌΠ½ΠΎΠΉ ΡΠ°ΡΡΠΈΡΠ΅Π»ΡΠ½ΠΎΡΡΠΈ Π² ΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ ΠΎΡΠ³Π°Π½ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ Π²Π΅ΡΠ΅ΡΡΠ²Π°, Π°ΠΊΠΊΡΠΌΡΠ»ΠΈΡΡΠ΅ΠΌΠΎΠ³ΠΎ Π² ΠΎΡΠ°Π΄ΠΊΠ°Ρ
. Π’Π΅ΠΌ Π½Π΅ ΠΌΠ΅Π½Π΅Π΅, Π²ΠΊΠ»Π°Π΄ ΠΏΠΎΡΠ΅Π½ΡΠΈΠ°Π»ΡΠ½ΠΎ ΠΌΠΈΠ³ΡΠ°ΡΠΈΠΎΠ½Π½ΠΎΠΉ ΠΎΡΠ³Π°Π½ΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΊΠΎΠΌΠΏΠΎΠ½Π΅Π½ΡΡ Π½Π΅ ΠΈΡΠΊΠ»ΡΡΠ΅Π½, ΡΠ°ΠΊ ΠΊΠ°ΠΊ Π΄Π»Ρ ΡΡΠ΄Π° ΠΎΠ±ΡΠ°Π·ΡΠΎΠ² ΠΎΡΠΌΠ΅ΡΠ°Π΅ΡΡΡ ΠΏΡΠΈΡΡΡΡΡΠ²ΠΈΠ΅ Π½ΠΈΠ·ΠΊΠΎΠΌΠΎΠ»Π΅ΠΊΡΠ»ΡΡΠ½ΠΎΠΉ ΡΡΠ°ΠΊΡΠΈΠΈ Π½-Π°Π»ΠΊΠ°Π½ΠΎΠ². Π Π΅Π·ΡΠ»ΡΡΠ°ΡΡ ΠΏΠΈΡΠΎΠ»ΠΈΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ Π°Π½Π°Π»ΠΈΠ·Π° ΠΎΠ±ΡΠ°Π·ΡΠΎΠ² ΡΠΊΠ°Π·ΡΠ²Π°ΡΡ Π½Π° ΡΠ΅Π·ΠΊΡΡ ΠΈΠ·ΠΌΠ΅Π½ΡΠΈΠ²ΠΎΡΡΡ ΡΠΎΠ΄Π΅ΡΠΆΠ°Π½ΠΈΡ Π‘ΠΎΡΠ³ ΠΈ Π»Π΅ΡΡΡΠΈΡ
ΠΎΡΠ³Π°Π½ΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠΎΠ΅Π΄ΠΈΠ½Π΅Π½ΠΈΠΉ Ρ Π³Π»ΡΠ±ΠΈΠ½ΠΎΠΉ.Studying Arctic biogeochemical ecosystem with various methods and approaches is of vital importance to further predict future global climate changes. Organic matter of modern bottom sediments, which accumulates heterogeneous signals of various processes of carbon transport and transformation, acts as the unique indicator of initial depositional environment of sediment and its diagenetic history. Using high-precision geochemical instruments allows us to obtain important information on potential input of both allochthonous and autochthonous components to organic matter, and thus to further promote understanding of the modern Arctic carbon cycle. The aim of the research is to study the lithological and organo-geochemical features of the sediments accumulated in the specific lagoon conditions of the coastal part of the Laptev Sea (Ivashkina Lagoon, Bykovsky Peninsula). Materials and methods. Precipitation in the area of the Lena river delta was selected as an object of the study. To assess the variability of molecular composition of organic matter in accumulation of sediments, the 18--meter interval of the VD-13 well, drilled in the central part of the Ivashkina lagoon during the 2013 spring Arctic expedition, was investigated. For the samples, their granulometric characteristics were determined, and pyrolytic and chromatography-mass spectrometric studies were conducted as well. It is shown that the increased content of organic carbon in the section is confined to the pelitic fraction of sediments. The distribution of n-alkanes is characterized by the dominance of high molecular weight odd homologues, which indicates the ubiquitous contribution of higher terrestrial vegetation to formation of organic matter accumulated in sediments. However, the contribution of the potentially migratory organic component is not excluded, since the presence of a low molecular weight fraction of n-alkanes is noted for a number of samples. The results of the pyrolytic analysis of the samples indicate a sharp variability in the content of Corg and volatile organic compounds with depth
Identifying sources of organic carbon in surface sediments of Laptev Sea shelf using a Rock-Eval approach
ΠΠΊΡΡΠ°Π»ΡΠ½ΠΎΡΡΡ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ ΠΎΠ±ΡΡΠ»ΠΎΠ²Π»Π΅Π½Π° Π½Π΅ΠΎΠ±Ρ
ΠΎΠ΄ΠΈΠΌΠΎΡΡΡΡ Π²ΡΠ΅ΡΡΠΎΡΠΎΠ½Π½Π΅Π³ΠΎ ΠΈΠ·ΡΡΠ΅Π½ΠΈΡ ΠΏΡΠΎΡΠ΅ΡΡΠΎΠ², ΠΎΡΠ²Π΅ΡΡΡΠ²Π΅Π½Π½ΡΡ
Π·Π° ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΡ Π±ΠΈΠΎΠ³Π΅ΠΎΡ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠ΅ΠΆΠΈΠΌΠ° Π°ΡΠΊΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠ΅Π³ΠΈΠΎΠ½Π°. Π£Π²Π΅Π»ΠΈΡΠ΅Π½ΠΈΠ΅ ΡΠ΅ΠΌΠΏΠΎΠ² Π΄Π΅Π³ΡΠ°Π΄Π°ΡΠΈΠΈ ΠΏΡΠΈΠ±ΡΠ΅ΠΆΠ½ΠΎΠΉ ΠΈ ΠΏΠΎΠ΄Π²ΠΎΠ΄Π½ΠΎΠΉ ΠΌΠ΅ΡΠ·Π»ΠΎΡΡ Π½Π° ΠΠΎΡΡΠΎΡΠ½ΠΎ-Π‘ΠΈΠ±ΠΈΡΡΠΊΠΎΠΌ ΡΠ΅Π»ΡΡΠ΅ ΠΏΡΠΈΠ²ΠΎΠ΄ΠΈΡ ΠΊ Π²ΠΎΠ²Π»Π΅ΡΠ΅Π½ΠΈΡ Π² ΡΠΎΠ²ΡΠ΅ΠΌΠ΅Π½Π½ΡΠΉ Π±ΠΈΠΎΠ³Π΅ΠΎΡ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠΈΠΉ ΡΠΈΠΊΠ» Π±ΠΎΠ»ΡΡΠΎΠ³ΠΎ ΠΎΠ±ΡΠ΅ΠΌΠ° ΡΠ΅ΠΌΠΎΠ±ΠΈΠ»ΠΈΠ·ΠΎΠ²Π°Π½Π½ΠΎΠ³ΠΎ ΠΎΡΠ³Π°Π½ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠ³Π»Π΅ΡΠΎΠ΄Π°. ΠΠ·ΡΡΠ΅Π½ΠΈΠ΅ ΠΎΡΠΎΠ±Π΅Π½Π½ΠΎΡΡΠ΅ΠΉ Π΅Π³ΠΎ ΡΡΠ°Π½ΡΠΏΠΎΡΡΠ° ΠΈ ΠΏΡΠ΅ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π½ΠΈΡ Π² ΡΠΈΡΡΠ΅ΠΌΠ΅ ΡΡΡΠ°-ΡΠ΅Π»ΡΡ ΠΈΠ³ΡΠ°Π΅Ρ Π²Π°ΠΆΠ½ΡΡ ΡΠΎΠ»Ρ Π΄Π»Ρ ΠΎΡΠ΅Π½ΠΊΠΈ ΡΡΠ½ΠΊΡΠΈΠΎΠ½ΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΠΊΡΠ°ΠΉΠ½Π΅ Ρ
ΡΡΠΏΠΊΠΎΠΉ Π°ΡΠΊΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΠΊΠΎΡΠΈΡΡΠ΅ΠΌΡ. Π¦Π΅Π»Ρ: ΠΈΠ·ΡΡΠ΅Π½ΠΈΠ΅ Π³Π΅ΠΎΡ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠΈΡ
Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊ ΠΎΡΠ³Π°Π½ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ Π²Π΅ΡΠ΅ΡΡΠ²Π°, ΠΏΡΠΎΡΠ»Π΅ΠΆΠΈΠ²Π°Π΅ΠΌΡΡ
ΠΏΠΎ ΠΏΡΠΎΡΠΈΠ»Ρ ΠΎΡ Π±Π΅ΡΠ΅Π³ΠΎΠ²ΠΎΠΉ Π·ΠΎΠ½Ρ ΠΊ ΠΊΠΎΠ½ΡΠΈΠ½Π΅Π½ΡΠ°Π»ΡΠ½ΠΎΠΌΡ ΡΠΊΠ»ΠΎΠ½Ρ ΠΌΠΎΡΡ ΠΠ°ΠΏΡΠ΅Π²ΡΡ
Ρ ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ΠΌ ΠΌΠ΅ΡΠΎΠ΄Π° Rock-Eval ΠΈ ΠΎΡΠ΅Π½ΠΊΠ° ΠΈΡ
Π²Π·Π°ΠΈΠΌΠΎΡΠ²ΡΠ·ΠΈ Ρ Π»ΠΈΡΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΠΌΠΈ ΡΠ²ΠΎΠΉΡΡΠ²Π°ΠΌΠΈ Π²ΠΌΠ΅ΡΠ°ΡΡΠΈΡ
ΠΎΡΠ°Π΄ΠΊΠΎΠ². ΠΠ±ΡΠ΅ΠΊΡΠΎΠΌ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ ΡΠ²ΠΈΠ»ΠΈΡΡ ΠΏΡΠΎΠ±Ρ Π΄ΠΎΠ½Π½ΡΡ
ΠΎΡΠ°Π΄ΠΊΠΎΠ², Π²Π·ΡΡΡΠ΅ Ρ ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠ½ΠΎΠ³ΠΎ Π³ΠΎΡΠΈΠ·ΠΎΠ½ΡΠ° (0-2 ΡΠΌ). ΠΡΠ±ΠΎΡ ΠΏΡΠΎΠ± ΠΏΡΠΎΠ²ΠΎΠ΄ΠΈΠ»ΡΡ Π² ΠΌΠΎΡΡΠΊΠΈΡ
Π°ΡΠΊΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠΊΡΠΏΠ΅Π΄ΠΈΡΠΈΡΡ
2018-2019 Π³Π³. Π½Π° ΠΠΠ‘ Β«ΠΠΊΠ°Π΄Π΅ΠΌΠΈΠΊ ΠΡΡΠΈΡΠ»Π°Π² ΠΠ΅Π»Π΄ΡΡΒ». Π Π΅Π·ΡΠ»ΡΡΠ°ΡΡ. ΠΠ° ΠΎΡΠ½ΠΎΠ²Π΅ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠΎΠ² ΠΏΠΈΡΠΎΠ»ΠΈΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ Π°Π½Π°Π»ΠΈΠ·Π° Π΄Π°Π½Π° Π³Π΅ΠΎΡ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠ°Ρ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊΠ° ΠΎΡΠ³Π°Π½ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ Π²Π΅ΡΠ΅ΡΡΠ²Π°, ΡΠΎΠ΄Π΅ΡΠΆΠ°ΡΠ΅Π³ΠΎΡΡ Π² Π΄ΠΎΠ½Π½ΡΡ
ΠΎΡΠ°Π΄ΠΊΠ°Ρ
ΠΌΠΎΡΡ ΠΠ°ΠΏΡΠ΅Π²ΡΡ
. ΠΡΠ³Π°Π½ΠΈΡΠ΅ΡΠΊΠΎΠ΅ Π²Π΅ΡΠ΅ΡΡΠ²ΠΎ, ΡΠΊΡΠΏΠΎΡΡΠΈΡΡΠ΅ΠΌΠΎΠ΅ Ρ ΡΠ΅ΡΠ½ΡΠΌ ΡΡΠΎΠΊΠΎΠΌ ΠΈ ΠΏΡΠΎΠ΄ΡΠΊΡΠ°ΠΌΠΈ Π±Π΅ΡΠ΅Π³ΠΎΠ²ΠΎΠΉ ΡΡΠΎΠ·ΠΈΠΈ, Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΠ·ΡΠ΅ΡΡΡ ΠΎΡΠ½ΠΎΡΠΈΡΠ΅Π»ΡΠ½ΠΎ Π½ΠΈΠ·ΠΊΠΈΠΌ ΠΊΠΈΡΠ»ΠΎΡΠΎΠ΄Π½ΡΠΌ (OI) ΠΈ Π²ΠΎΠ΄ΠΎΡΠΎΠ΄Π½ΡΠΌ (HI) ΠΈΠ½Π΄Π΅ΠΊΡΠ°ΠΌΠΈ Π² ΠΏΡΠΈΠ±ΡΠ΅ΠΆΠ½ΠΎΠΉ Π·ΠΎΠ½Π΅ ΠΈ Π½Π° Π³Π»ΡΠ±ΠΈΠ½Π°Ρ
Π΄ΠΎ Π½Π΅ΡΠΊΠΎΠ»ΡΠΊΠΈΡ
Π΄Π΅ΡΡΡΠΊΠΎΠ² ΠΌΠ΅ΡΡΠΎΠ². Π ΡΠ°ΠΉΠΎΠ½Π΅ ΡΡΠ΅Π΄Π½Π΅Π³ΠΎ ΡΠ΅Π»ΡΡΠ° ΡΡΡΠ΅ΡΡΠ²Π΅Π½Π½ΠΎΠ΅ Π²Π»ΠΈΡΠ½ΠΈΠ΅ Π½Π° ΡΠΎΡΡΠ°Π² ΠΎΡΠ³Π°Π½ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ Π²Π΅ΡΠ΅ΡΡΠ²Π°, ΠΏΠΎ Π²ΡΠ΅ΠΉ Π²ΠΈΠ΄ΠΈΠΌΠΎΡΡΠΈ, ΠΎΠΊΠ°Π·ΡΠ²Π°Π΅Ρ ΡΠ½ΠΎΡ ΠΎΡΠ°Π΄ΠΎΡΠ½ΠΎΠ³ΠΎ Π²Π΅ΡΠ΅ΡΡΠ²Π° Ρ ΠΠΎΠ²ΠΎΡΠΈΠ±ΠΈΡΡΠΊΠΈΡ
ΠΎΡΡΡΠΎΠ²ΠΎΠ², Π³Π΄Π΅ Π°ΠΊΡΠΈΠ²Π½ΠΎ Π΄Π΅ΠΉΡΡΠ²ΡΡΡ ΡΠ΅ΡΠΌΠΎΠ°Π±ΡΠ°Π·ΠΈΠΎΠ½Π½ΡΠ΅ ΠΏΡΠΎΡΠ΅ΡΡΡ (ΡΠ½ΠΈΠΆΠ΅Π½ΠΈΠ΅ Π·Π½Π°ΡΠ΅Π½ΠΈΠΉ HI ΠΈ ΡΠ²Π΅Π»ΠΈΡΠ΅Π½ΠΈΠ΅ OI). ΠΡΡΠΊΠ°Π·Π°Π½ΠΎ ΠΏΡΠ΅Π΄ΠΏΠΎΠ»ΠΎΠΆΠ΅Π½ΠΈΠ΅, ΡΡΠΎ Π΄Π»Ρ ΠΏΡΠΎΠ΄ΡΠΊΡΠΎΠ², Π²ΡΠ½ΠΎΡΠΈΠΌΡΡ
ΡΠ΅ΡΠ½ΡΠΌ ΡΡΠΎΠΊΠΎΠΌ, ΠΈ ΠΏΡΠΎΠ΄ΡΠΊΡΠΎΠ² ΡΡΠΎΠ·ΠΈΠΈ Π±Π΅ΡΠ΅Π³ΠΎΠ² Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠ½Ρ ΡΠ°Π·Π»ΠΈΡΠ½ΡΠ΅ ΠΏΠΈΡΠΎΠ»ΠΈΡΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΡ, ΠΎΠΏΡΠ΅Π΄Π΅Π»ΡΠ΅ΠΌΡΠ΅ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ Rock-Eval (Π² ΡΠ°ΡΡΠ½ΠΎΡΡΠΈ, Π·Π½Π°ΡΠ΅Π½ΠΈΡ HI, OI ΠΈ Tpeak).An increasing rate of degradation of coastal and subsea permafrost leads to remobilization of huge amounts of organic carbon. To know how this remobilized carbon behaves while being transported through the land-shelf system is crucially important for understanding an extremely fragile Arctic ecosystem. This study is aimed at tracing the geochemical signals of organic matter along the profile from the coastal zone to the continental slope of the Laptev Sea, using the Rock-Eval approach. We investigated surface sediment samples obtained during the Arctic marine expeditions of 2018-2019 on the R/V "Akademik Mstislav Keldysh". The most active oxidation of organic matter, exported with river runoff and products of coastal erosion, occurs in the coastal zone at a depth of several tens of meters. A significant effect on the organic matter composition is exerted by the sediment export from Novosibirsk Islands eroding coastlines. We assume that various products carried by river runoff and coastal erosion are characterized by various signatures detected by the Rock-Eval method (e.g., the OI and Tpeak values). It is also shown that the mineral matrix does not seem to provide a first-order control on preventing organic matter degradation during transport from the coastal zone to deep-sea basins
Lithological features and organic matter of sediments in the south-eastern Laptev sea (Muostakh Cape)
ΠΠΊΡΡΠ°Π»ΡΠ½ΠΎΡΡΡ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ ΠΏΡΠΎΠ΄ΠΈΠΊΡΠΎΠ²Π°Π½Π° Π½Π΅ΠΎΠ±Ρ
ΠΎΠ΄ΠΈΠΌΠΎΡΡΡΡ ΠΈΠ·ΡΡΠ΅Π½ΠΈΡ ΡΠΎΠ²ΡΠ΅ΠΌΠ΅Π½Π½ΡΡ
ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΠΉ ΠΊΠ»ΠΈΠΌΠ°ΡΠ°, ΠΊΠΎΡΠΎΡΡΠ΅ ΡΠ°ΡΡΠΌΠ°ΡΡΠΈΠ²Π°ΡΡΡΡ ΠΊΠ°ΠΊ ΠΏΠΎΡΠ»Π΅Π΄ΡΡΠ²ΠΈΡ ΠΏΠ°ΡΠ½ΠΈΠΊΠΎΠ²ΠΎΠ³ΠΎ ΡΡΡΠ΅ΠΊΡΠ°, ΠΎΠ±ΡΡΠ»ΠΎΠ²Π»Π΅Π½Π½ΠΎΠ³ΠΎ ΡΠΎΡΡΠΎΠΌ ΡΠΎΠ΄Π΅ΡΠΆΠ°Π½ΠΈΡ Π² Π°ΡΠΌΠΎΡΡΠ΅ΡΠ΅ ΠΎΡΠ½ΠΎΠ²Π½ΡΡ
ΠΏΠ°ΡΠ½ΠΈΠΊΠΎΠ²ΡΡ
Π³Π°Π·ΠΎΠ² -Π΄Π²ΡΠΎΠΊΠΈΡΠΈ ΡΠ³Π»Π΅ΡΠΎΠ΄Π° ΠΈ ΠΌΠ΅ΡΠ°Π½Π°. ΠΠ»Ρ ΠΈΠ·ΡΡΠ΅Π½ΠΈΡ ΡΡΠΎΠΉ ΠΏΡΠΎΠ±Π»Π΅ΠΌΡ ΠΈ ΠΏΠΎΡΡΡΠΎΠ΅Π½ΠΈΡ ΠΌΠΎΠ΄Π΅Π»ΠΈ ΠΊΠ»ΠΈΠΌΠ°ΡΠ° Π½Π΅ΠΎΠ±Ρ
ΠΎΠ΄ΠΈΠΌΠΎ ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½ΠΈΠ΅ ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠ½ΡΡ
ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΉ Π² ΡΠΈΡΡΠ΅ΠΌΠ΅ ΡΡΡΠ°-ΡΠ΅Π»ΡΡ-Π°ΡΠΌΠΎΡΡΠ΅ΡΠ° Π½Π° ΠΡΠΊΡΠΈΡΠ΅ΡΠΊΠΎΠΌ ΡΠ΅Π»ΡΡΠ΅, Π²ΠΊΠ»ΡΡΠ°Ρ ΠΎΡΠ΅Π½ΠΊΡ ΠΏΠΎΡΠ΅Π½ΡΠΈΠ°Π»Π° ΠΌΠΎΡΠ΅ΠΉ ΠΠΎΡΡΠΎΡΠ½ΠΎΠΉ ΠΡΠΊΡΠΈΠΊΠΈ Π² ΠΊΠΎΠ½ΡΠ΅ΠΊΡΡΠ΅ ΠΎΡΠΎΠ±Π΅Π½Π½ΠΎΡΡΠ΅ΠΉ Π»ΠΈΡΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠΎΡΡΠ°Π²Π° ΠΈ ΡΡΠ°Π½ΡΡΠΎΡΠΌΠ°ΡΠΈΠΈ ΠΎΡΠ³Π°Π½ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ Π²Π΅ΡΠ΅ΡΡΠ²Π° Π² ΡΠ³Π»Π΅Π²ΠΎΠ΄ΠΎΡΠΎΠ΄Ρ Π² ΠΏΡΠΎΡΠ΅ΡΡΠ΅ Π΄ΠΈΠ°Π³Π΅Π½Π΅ΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΈ ΠΊΠ°ΡΠ°Π³Π΅Π½Π΅ΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΏΡΠ΅ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π½ΠΈΠΉ. Π¦Π΅Π»Ρ: ΠΈΠ·ΡΡΠ΅Π½ΠΈΠ΅ Π»ΠΈΡΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΈ ΠΌΠΈΠ½Π΅ΡΠ°Π»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠΎΡΡΠ°Π²ΠΎΠ², ΠΈΠ·ΠΌΠ΅Π½ΡΠΈΠ²ΠΎΡΡΠΈ ΡΠΎΠ΄Π΅ΡΠΆΠ°Π½ΠΈΡ ΠΎΡΠ³Π°Π½ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ Π²Π΅ΡΠ΅ΡΡΠ²Π° (Π‘ΠΎΡΠ³), ΠΌΠΎΠ»Π΅ΠΊΡΠ»ΡΡΠ½ΠΎΠ³ΠΎ ΠΈ ΠΈΠ·ΠΎΡΠΎΠΏΠ½ΠΎΠ³ΠΎ ΡΠΎΡΡΠ°Π²Π° ΡΠ³Π»Π΅ΡΠΎΠ΄Π° (Ξ΄13C) Π² ΠΎΡΠ»ΠΎΠΆΠ΅Π½ΠΈΡΡ
Π»Π΅Π΄ΠΎΠ²ΠΎΠ³ΠΎ ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠ° ΠΏΠΎΠ±Π΅ΡΠ΅ΠΆΡΡ ΠΌΠΎΡΡ ΠΠ°ΠΏΡΠ΅Π²ΡΡ
(ΠΌΡΡ ΠΡΠ°ΡΡΠ°Ρ
). ΠΠ±ΡΠ΅ΠΊΡ: ΠΏΡΠΎΠ±Ρ ΡΠΎΠ²ΡΠ΅ΠΌΠ΅Π½Π½ΡΡ
Π΄ΠΎΠ½Π½ΡΡ
ΠΎΡΠ°Π΄ΠΊΠΎΠ², ΠΎΡΠΎΠ±ΡΠ°Π½Π½ΡΡ
Π² Ρ
ΠΎΠ΄Π΅ ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½ΠΈΡ ΡΠΊΡΠΏΠ΅Π΄ΠΈΡΠΈΠΎΠ½Π½ΡΡ
ΡΠ°Π±ΠΎΡ 2015 Π³. Π² ΡΠ³ΠΎ-Π²ΠΎΡΡΠΎΡΠ½ΠΎΠΉ ΡΠ°ΡΡΠΈ ΠΌΠΎΡΡ ΠΠ°ΠΏΡΠ΅Π²ΡΡ
. ΠΠ΅ΡΠΎΠ΄ΠΈΠΊΠ° ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ Π΄ΠΎΠ½Π½ΡΡ
ΠΎΡΠ»ΠΎΠΆΠ΅Π½ΠΈΠΉ Π²ΠΊΠ»ΡΡΠ°Π΅Ρ Π² ΡΠ΅Π±Ρ ΠΏΡΠΎΠ±ΠΎΠΏΠΎΠ΄Π³ΠΎΡΠΎΠ²ΠΊΡ, Π»Π°Π±ΠΎΡΠ°ΡΠΎΡΠ½ΠΎ-Π°Π½Π°Π»ΠΈΡΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ (Ρ
ΡΠΎΠΌΠ°ΡΠΎΠΌΠ°ΡΡ-ΡΠΏΠ΅ΠΊΡΡΠΎΠΌΠ΅ΡΡΠΈΡ, ΠΏΠΈΡΠΎΠ»ΠΈΠ·, ΠΈΠ·ΠΎΡΠΎΠΏΠΈΡ, ΡΠ΅Π½ΡΠ³Π΅Π½ΠΎΡΠ°Π·ΠΎΠ²ΡΠΉ Π°Π½Π°Π»ΠΈΠ·, ΠΌΠ΅ΡΠΎΠ΄Ρ ΠΎΠ±ΡΠ°Π±ΠΎΡΠΊΠΈ ΠΈ ΠΈΠ½ΡΠ΅ΡΠΏΡΠ΅ΡΠ°ΡΠΈΠΈ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠΎΠ²). Π Π΅Π·ΡΠ»ΡΡΠ°ΡΡ. ΠΠ·ΡΡΠ΅Π½ ΠΌΠΈΠ½Π΅ΡΠ°Π»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΠΉ ΡΠΎΡΡΠ°Π² Π³Π»ΠΈΠ½ΠΈΡΡΠΎΠΉ ΡΡΠ°ΠΊΡΠΈΠΈ, ΡΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½Π° Π·ΠΎΠ½Π°Π»ΡΠ½ΠΎΡΡΡ ΡΠ°ΡΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΡ Π³Π»ΠΈΠ½ΠΈΡΡΡΡ
ΠΌΠΈΠ½Π΅ΡΠ°Π»ΠΎΠ². ΠΡΡΠ²Π»Π΅Π½Ρ ΠΎΡΠΎΠ±Π΅Π½Π½ΠΎΡΡΠΈ ΡΠΎΡΡΠ°Π²Π° ΠΎΡΠ³Π°Π½ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ Π²Π΅ΡΠ΅ΡΡΠ²Π° Π½Π° ΠΌΠΎΠ»Π΅ΠΊΡΠ»ΡΡΠ½ΠΎΠΌ ΠΈ ΠΈΠ·ΠΎΡΠΎΠΏΠ½ΠΎΠΌ ΡΡΠΎΠ²Π½ΡΡ
. ΠΠΎΠ»ΡΡΠ΅Π½Ρ ΠΏΠ΅ΡΠ²ΡΠ΅ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ ΠΏΠΎ ΠΏΠΎΡΠ΅Π½ΡΠΈΠ°Π»Ρ Π³Π΅Π½Π΅ΡΠ°ΡΠΈΠΈ ΡΠ³Π»Π΅Π²ΠΎΠ΄ΠΎΡΠΎΠ΄ΠΎΠ² ΠΈΠ· ΠΎΡΠ³Π°Π½ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ Π²Π΅ΡΠ΅ΡΡΠ²Π° ΠΎΡΠ°Π΄ΠΊΠΎΠ² Π»Π΅Π΄ΠΎΠ²ΠΎΠ³ΠΎ ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠ°, ΠΊΠΎΡΠΎΡΡΠ΅ Π΄ΠΎΠΌΠΈΠ½ΠΈΡΡΡΡ Π² ΠΌΠ΅Π»ΠΊΠΎΠ²ΠΎΠ΄Π½ΠΎΠΉ ΡΠ°ΡΡΠΈ ΠΠΎΡΡΠΎΡΠ½ΠΎ-Π‘ΠΈΠ±ΠΈΡΡΠΊΠΎΠ³ΠΎ ΡΠ΅Π»ΡΡΠ°. Π Π΅Π·ΡΠ»ΡΡΠ°ΡΡ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΉ, ΠΏΠΎΠ»ΡΡΠ΅Π½Π½ΡΠ΅ ΠΏΠΎ Π΄Π°Π½Π½ΡΠΌ ΠΏΠΈΡΠΎΠ»ΠΈΠ·Π° ΠΈ Ρ
ΡΠΎΠΌΠ°ΡΠΎΠΌΠ°ΡΡΡΠΏΠ΅ΠΊΡΡΠΎΠΌΠ΅ΡΡΠΈΠΈ, ΠΈΠΌΠ΅ΡΡ Π²ΡΡΠΎΠΊΡΡ ΡΡΠ΅ΠΏΠ΅Π½Ρ ΠΊΠΎΡΡΠ΅Π»ΡΡΠΈΠΈ ΠΈ ΠΎΡΡΠ°ΠΆΠ°ΡΡ ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡ Π±ΠΈΠΎΡ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΏΡΠΎΡΠ΅ΡΡΠΎΠ², ΡΠΎΠΏΡΠΎΠ²ΠΎΠΆΠ΄Π°ΡΡΠΈΡ
ΠΏΡΠ΅Π²ΡΠ°ΡΠ΅Π½ΠΈΠ΅ ΠΎΡΠ³Π°Π½ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ Π²Π΅ΡΠ΅ΡΡΠ²Π° Π½Π° ΡΠ°Π·Π»ΠΈΡΠ½ΡΡ
ΡΡΠ°Π΄ΠΈΡΡ
Π»ΠΈΡΠΎΠ³Π΅Π½Π΅Π·Π°. ΠΡΠΎΠΌΠ΅ ΡΠΎΠ³ΠΎ, ΠΏΡΠΈΠ²Π΅Π΄Π΅Π½Ρ ΠΏΠ΅ΡΠ²ΡΠ΅ ΠΎΡΠ΅Π½ΠΊΠΈ ΠΏΠΎΡΠ΅Π½ΡΠΈΠ°Π»Π° Π³Π΅Π½Π΅ΡΠ°ΡΠΈΠΈ Π»Π΅Π³ΠΊΠΈΡ
ΡΠ³Π»Π΅Π²ΠΎΠ΄ΠΎΡΠΎΠ΄ΠΎΠ² ΠΈΠ· Π‘ΠΎΡΠ³ ΠΈΡΡΠ»Π΅Π΄ΡΠ΅ΠΌΡΡ
ΠΎΡΠ°Π΄ΠΊΠΎΠ².The present study seeks to improve current understanding of modern climate changes, which are considered as the consequences of the greenhouse effect caused by increasing content of the main greenhouse gases - carbon dioxide and methane. Complex studies in the land-shelf-atmosphere system across the Arctic shelf, including biogeochemical and lithological analyses of sediments across Eastern Arctic seas, are needed. The research aims to study both lithological and mineralogical sediment compositions, variability of the organic matter content (Corg), molecular and isotopic composition of carbon (Ξ΄13C) contained in the ice complex deposits (ICD) along the Laptev Sea coast (Cape Muostakh). Samples of modern bottom sediments obtained during the expedition of 2015 in the south-eastern part of the Laptev Sea were investigated. Methods used in the present study include GC:MS analysis, pyrolysis, isotope analysis, X:ray phase analysis followed by further numerical processing and interpretation. Results. The mineralogical composition of the clay fraction has been studied, and the distribution of clay minerals has been established. The features of molecular and isotopic Corg composition are revealed. Initial results on the hydrocarbon source of ICD:Corg, which dominates in the shallow part of the East Siberian Arctic shelf, are obtained. Pyrolysis and GC:MS data are highly correlated reflecting complex biogeochemical processes occurring during the Corg transformation at the various stages of lithogenesis. In addition, the study provides preliminary estimates of the light hydrocarbons generation potential for the Corg contained in the sediments. The aim of the work is to study the chemical composition of biological water of individual organs and tissues, on the example of domestic pigs, to obtain background characteristics for biogeochemical monitoring. The methods. Organs and tissues of seven-month domestic pig was sampled in Uspenka village, Pavlodar region (Kazakhstan) just after the slaughter and packed in plastics packages. Biological water was exudated by vacuum sublimation method upon the application of heat. The exudate was analyzed in certificated scientific-education center Β«WaterΒ» at Tomsk Polytechnic University by the method of inductively coupled plasma mass spectrometry according to the certified HCAM 480X method with NeXION 300D spectrometer. Result. The authors have studied the composition and characteristics of distribution of 70 chemical elements in biological water, separated by vacuum sublimation from the organs and tissues of the domestic pig, selected on the territory of the conditionally environmentally friendly village Uspenka, Pavlodar region. The interrelation between the elemental composition of the biological fluid and the physiological functions of the organs of the animals studied as well as the composition of the habitat was revealed