Geochemical anomalies of hydrocarbon gases in bottom sediments of eostructures of the Laptev-Siberian transition zone of the East Arctic shelf

Cover Page

Cite item

Full Text

Open Access Open Access
Restricted Access Access granted
Restricted Access Subscription Access

Abstract

The data of gas geochemical studies of bottom sediments of the Laptev-Siberian transition zone are presented. The established isotope-geochemical indicators determine the dominance of epigenetic hydrocarbon gases of various gas sources in the sediments. Methane concentrations up to 8.3047 cm3/ kg and the sum of its homologues up to 0.0260 cm3/kg indicate the formation of hydrocarbon anomalies exceeding the anomaly criteria for Arctic shelf sediments by 166 and 26 times. The main geological factors for the formation and distribution of anomalies in the bottom sediments of the Laptev-Siberian transition zone are the high gas content of the underlying sediments and gas sources, fold and fault tectonics, geostructural position, seismic activity and depth of occurrence of hydrocarbon sources.

Full Text

Restricted Access

About the authors

A. I. Gresov

Il’ichev Pacific Oceanological Institute, Far East Branch, Russian Academy of Sciences

Author for correspondence.
Email: gresov@poi.dvo.ru
Russian Federation, Vladivostok

A. V. Yatsuk

Il’ichev Pacific Oceanological Institute, Far East Branch, Russian Academy of Sciences

Email: yatsuk@poi.dvo.ru
Russian Federation, Vladivostok

References

  1. B. Cramer D. Franke // Journal of Petroleum Geology. V. 28(4), October 2005, Р. 1–15.
  2. Яшин Д. С., Ким Б. И. // Геология нефти и газа. 2007. № 4. С. 24–35.
  3. Государственная геологическая карта. Масштаб 1:1000 000. Серия Лаптево-Сибироморская. Листы S-53, S-54. Объяснительная записка. СПб.: ВСЕГЕИ, 2016, 309 с.
  4. Государственная геологическая карта России и прилегающих акваторий. Масштаб 1:2500000. СПб.: ВСЕГЕИ, 2016.
  5. Руководство по определению и прогнозу газоносности вмещающих пород при геологоразведочных работах. Ростов-на-Дону: ВНИИГРИуголь. 1985. 96 с.
  6. Велев В. Х. Молекулярная масса углеводородной фракции и весовое распределение компонентов С 1 -С 5 в природных газах разных генетических типов. Органическая геохимия нефтей, газов и органического вещества докембрия. (Под ред. Алексеева А. А.). М.: Наука, 1981, С. 22–28.
  7. Abrams M. A. // Marine and Petroleum Geology. 2005. № 22. P. 457–477.
  8. Гресов А. И. Метаноресурсная база угольных бассейнов Дальнего Востока и перспективы ее промышленного освоения. Том 2. Углеметановые бассейны Республики Саха (Якутия) и Северо-Востока России. Владивосток: Дальнаука, 2012. 468 с.
  9. Гресов А. И., Яцук А. В. // Геология и геофизика. 2021. Т. 62. № 2. С. 197–215.
  10. Гресов А. И., Яцук А. В. // Геология нефти и газа. 2023. № 1. С. 95–110.

Supplementary files

Supplementary Files
Action
1. JATS XML
Download
2. Fig. 1. Structural and tectonic map of the study area [3, 4]: 1 – first-order geostructures: troughs: 1 – Novosibirsk, 2 – Belkovsko-Svyatonossky, 3 – Omoloysky, 4 – Anisinsky; graben-rift: 5 – Severo-Omoloysky; uplifts: 6 – East Laptevskoye, 7 – Kotelnicheskoye, 8 – Reshetnikovskoye; horsts: 9 – Stolbovskoy, 10 – Belkovsky; structural terraces: 11 – Shelonskaya, 12 – Blagoveshchenskaya; 13 – Sannikovskaya saddle. 2 – tectonic faults: a – reliable, b – inferred. 3 – isobaths, m. 4 – earthquake epicenters (according to USGS Earthquake Hazards Program). 5 – isohypses of sedimentary cover thickness, km. 6 – bottom stations with concentrations of hydrocarbon gases in sediments: < 0.05 (a), 0.05–0.25 (b), 0.25–0.50 (c), 0.50–1.00 (d) and > 1.00 cm3/kg (d). Station numbers of coastal expeditions and ship sampling on-site – 49–82; cruises LV83 and LV90 of the R/V “Akademik M. A. Lavrentyev” – 83–4–83–36 and 90–25. Yu-A – South Anyui Suture.

Download (133KB)
Indexing metadata

Copyright (c) 2024 Russian Academy of Sciences