MANIFESTATIONS OF MODERN FLUID DYNAMIC ACTIVITY OF THE NORTHERN CASPIAN SEA (GEOPHYSICAL DATA)

  • V. A. Putans Shirshov Institute of Oceanology, Russian Academy of Sciences
  • L. R. Merklin Shirshov Institute of Oceanology, Russian Academy of Sciences
  • A. Yu. Ivanov Shirshov Institute of Oceanology, Russian Academy of Sciences
  • A. K. Ambrosimov Shirshov Institute of Oceanology, Russian Academy of Sciences
DOI 10.29006/1564-2291.JOR-2019.47(5).8
Keywords Caspian Sea, seismoacoustics, seismostratigraphy, gas saturated sediments, fluid dynamics, oil seeps

Abstract

The paper presents analysis of geological-geophysical data, both from archives and collected in recent expeditions by Shirshov Institute of Oceanology, RAS (SIO RAS) together with satellite data. The interpretation shows modern rise of fluid dynamic activity on North Caspian. Based on summary of previous data, it is possible to recognize ryithmostratigraphic and seismostratigraphic complexes. Side sonar data shows many reflexing objects on the sea bottom. One of the most prominent features of Northern and Central Caspian is great number of pipe-like vertical bodies, they were discovered by SIO RAS expeditions with high-resolution seismic methods. These “pipes” go down beyond seismic section data. All specified seismic anomalies and bottom microrelief can be considered as evidence of vertical migration of gas and water via sediments and its escaping to water by gas and water grifons. Satellite images of North and Central Caspian show great amount of sliks and oil signs on the sea surface, and some of them present constantly on the same place, so it is possible to claim the sub-bottom fluid escape theory. The paper shows connection between bottom structures and grifon activity via satellite images (spatial-time grouping of oil slicks) of 2011–2019.

 

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Published
2019-12-23
Issue
Vol 47 No 5 (2019): Journal of Oceanological Research
Section
International Round Table “The Future of the Caspian: Research Projects and Stud

Transfer of copyrights occurs on the basis of a license agreement between the Author and Shirshov Institute of Oceanology, RAS