- PII
- S30345979S0030157425020053-1
- DOI
- 10.7868/S3034597925020053
- Publication type
- Article
- Status
- Published
- Authors
- Volume/ Edition
- Volume 65 / Issue number 2
- Pages
- 243-252
- Abstract
- During the 89th cruise of the R/V “Akademik Mstislav Keldysh” in 2022, sediment columns were sampled at stations 7441 and 7444 located in the southwestern part of the Kara Sea. Station 7444 was located on a large submeridional depression, under the bottom of which gas-saturated sedimentary strata were detected. Background station 7441 was located at a distance of 68 km from station 7444. For the sediments of the background station 7441, the ratio of hydrocarbon gases C/(C + C) < 100 indicated their thermogenic nature. In the sediment at station 7441, the formation of the gas component in the sediment was due to degradation of OM and inflow of thermogenic gases, while in the sediment of station 7444 there was an inflow of biogenic gas, apparently, from permafrost. The average concentration of CH in the sediment of station 7444 exceeded the average concentration in the sediment of column 7441 by 700 times, and the average concentrations of CO in the sediment of stations 7444 and 7441 were comparable. A sulfate-methane transition zone (SMTZ) was detected at the 541–545 cm horizon of the sediment of station 7444, where sulfate concentration decreased to minimum values, CH and CO concentrations reached maximum values. The sulfur isotopic composition of δS in this region was +20.8‰. The biogenic nature of gas in the sediment of station 7444 was evidenced by low values of the carbon isotopic composition of CH (mean value δC(CH) = –99.7‰), and high C/(C + C) > 10000 ratio near the SMTZ.
- Keywords
- Карское море осадки органическое вещество углеводородные газы изотопный состав углерода
- Date of publication
- 22.11.2024
- Year of publication
- 2024
- Number of purchasers
- 0
- Views
- 30
References
- 1. Ананьев Р.А., Дмитриевский Н.Н., Росляков А.Г. и др. Использование комплексных акустических методов для мониторинга процессов эмиссии газов на шельфе арктических морей // Океанология. 2022. Т. 62. № 1. С. 151–157.
- 2. Баранов Б.В., Лобковский Л.И., Дозорова К.А. и др. Система разломов, контролирующих метановые силы на шельфе моря Лаптевых // Докл. РАН. 2019. Т. 486. № 3. С. 354–358.
- 3. Баранов Б.В., Амбросенко А.К., Мороз Е.А. и др. Позанечетвертичные контурировые дрифты на шельфе Карского моря // Докл. РАН. Науки о Земле. 2023. Т. 511. № 2. С. 102–108.
- 4. Бомбур В.Г., Кузнецова Т.В. Выявление газовых силов в акватории арктических морей с использованием данных дистанционного зондирования // Исследование Земли из космоса. 2015. № 4. С. 30–43.
- 5. Верба М.Л. Современное билатеральное растяжение земной коры в Баренцево-Карском регионе и его роль при оценке перспектив нефтегазово-ности // Нефтегазовая геология. Теория и практика. 2007. Т. 2. С. 1–37.
- 6. Галимов Э.М., Кодина Л.А. Исследование органического вещества и газов в донных толщах для Мирового океана. М.: Наука, 1982. 228 с.
- 7. Денисова А.П., Мороз Е.А., Сухих Е.А. и др. Признаки глубинной дегазации в верхней части осадочного чехла шельфа и водной толще Карского моря // Геология морей и океанов: Материалы XXIV Международной научной конференции (Школы) по морской геологии. М.: ИО РАН, 2021. Т. IV. С. 235–239.
- 8. Мусатов Е.Е. Палеодолины Баренцево-Карского шельфа // Геоморфология. 1998. № 2. С. 90–95.
- 9. Соколов С.Ю., Мороз Е.А., Авранов Г.Д. и др. Проявления дегазации в верхней части осадочного разреза Печорского моря и ее связь с тектоникой // Докл. РАН. Науки о Земле. 2021. Т. 499. № 2. С. 91–96.
- 10. Gallinov E.M. Isotope organic geochemistry // Org. Geochem. 2006. V. 37. № 10. P. 1200–1262. https://doi.org/10.1016/j.orgeochem.2006.04.009
- 11. Hedges J.I., Keil R.G. Sedimentary organic matter preservation: an assessment and speculative synthesis // Mar. Chem. 1995. V. 49. P. 81–115. https://doi.org/10.1016/0304-4203 (95)00008-f
- 12. Hilligsoe K.M., Jensen J.B., Ferdelman T.G. et al. Methane fluxes in marine sediments quantified through core analyses and seismo-acoustic mapping (Bornholm Basin, Baltic Sea) // Geochim. Cosmochim. Acta. 2018. V. 239. P. 255–274. https://doi.org/10.1016/j.gca.2018.07.040
- 13. Hong W.L., Torres M.E., Carroll J. et al. Seepage from an Arctic shallow marine gas hydrate reservoir is insensitive to momentary ocean warming // Nature Commun. 2017. 8:15745. https://doi.org/10.1038/ncomms15745
- 14. Keller M.D, Bellows M.K., Guillard R.R. Dimethyl sulfide production in marine phytoplankton // In: Saltzman E.S., Cooper W.J. (Eds.). Biogenic sulfur in the environment. Washington, D.C.: American Chemical Society, 1989. P. 167–182.
- 15. Kim J.H., Torres M.E., Choi J. et al. Inferences on gas transport based on molecular and isotopic signatures of gases at acoustic chimneys and background sites in the Ulleung Basin // Org. Geochem. 2012. V. 43. P. 26–38. https://doi.org/10.1016/j.orgeochem.2011.11.004
- 16. Kim J.H., Hachikubo A., Kida M. et al. Upwarding gas source and postgenetic processes in the shallow sediments from the ARAON Mounds, Chukchi Sea // J. Nat. Gas Sci. Eng. 2020. V. 76. 103223. https://doi.org/10.1016/j.jngse.2020.103223
- 17. Mau S., Romer M., Torres M.E. et al. Widespread methane seepage along the continental margin off Svalbard-from Bjornova to Kongsfjorden // Sci. Rep. 2017. 7:42997. https://doi.org/10.1038/srep42997
- 18. Mazumdar A., João H.M., Peketi A. et al. Geochemical and geological constraints on the composition of marine sediment pore fluid: Possible link to gas hydrate deposits // Mar. Pet. Geol. 2012. V. 38. P. 35–52. https://doi.org/10.1016/j.marpeigeo.2012.07.004
- 19. McGuire A.D., Anderson L.G., Christensen T.R. et al. Sensitivity of the carbon cycle in the Arctic to climate change // Ecol. Monogr. 2009. V. 79. P. 523–555. https://doi.org/10.1890/08–2025.1.
- 20. Milkov A.V., Etiope G. Revised genetic diagrams for natural gases based on a global dataset of > 20,000 samples // Org. Geochem. 2018. V. 125. P. 109–120. https://doi.org/10.1016/j.orgeochem.2018.09.002
- 21. Niemann H., Elbert M., Howland M. et al. Methane emission and consumption at a North Sea gas seep (Tonmeilten area) // Biogeosciences. 2005. V. 2 P. 335–351. https://doi.org/10.5194/bg-2–335–2005
- 22. Pohlman J.W., Riedel M., Bauer J.E. et al. Anaerobic methane oxidation in low-organic content methane seep sediments // Geochim. Cosmochim. Acta. 2013. V. 108. P. 184–201. https://doi.org/10.1016/j.gca.2013.01.022
- 23. Portnov A., J. Smith A.J., Muenert J. et al. Offshore permafrost decay and massive seabed methane escape in water depths > 20m at the South Kara Sea shelf // Geophys. Res. Lett. 2013. V. 40. P. 3962–3967. https://doi.org/10.1002/gtl.50735
- 24. Rantanen M., Karpechko A.Y., Lipponen A. et al. The Arctic has warmed nearly four times faster than the globe since 1979 // Commun Earth Environ. 2022. V. 3. https://doi.org/10.1038/s43247-022-00498-3
- 25. Semenov P., Portnov A., Krylov A. et al. Geochemical evidence for seabed fluid flow linked to the subsea permafrost outer border in the South Kara Sea // Geochemistry. 2020. V. 80. P. 1–9. https://doi.org/10.1016/j.chemer.2019.04.005
- 26. Whiticar M.J. Carbon and hydrogen isotope systematics of bacterial formation and oxidation of methane // Chem. Geol. 1999. V. 161. P. 291–314. https://doi.org/10.1016/S0009-2541 (99)0009-3
