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Main Structural Elements of Eastern Russian Arctic Continental Margin Derived from Satellite Gravity and Multichannel Seismic Reflection Data

  • S. S. Drachev
  • G. L. Johnson
  • S. W. Laxon
  • D. C. McAdoo
  • H. Kassens

Abstract

This paper presents an analysis of the altimeter derived marine gravity data and available multichannel seismic reflection profiles of the northeastern Siberia continental margin to provide a preliminary delineation of its geologic structure. Both data sets allow making a suggestion that the continental margin was strongly affected by the rifting process since mid of Mesozoic. The main rift zones extend south- and southeastward from the shelf edge toward the mainland. These are the Laptev Rift System, New Siberian and Vil‘kitskii rifts in the East Siberian Sea, and North Chukchi rift basin in the Chukchi Sea. These structures may represent both active and aborted rifts related to extension episodes in the Arctic Ocean, namely: initial rifting in the Canada Basin (Middle Jurassic to Hauterivian), opening of the Makarov Basin (53–80 Ma ?) and spreading in the Eurasia Basin (0–56 Ma). Thus it is suggested that the spreading migrated westward during the Cretaceous-Cenozoic time and led to separation and fragmentation of the continental blocks (Lomonosov and Mendeleev ridges, Chukchi Plateau) and subsidence of the rift basins on the eastern Russian Arctic continental margin.

Keywords

Rift Basin Lomonosov Ridge Main Structural Element Eurasia Basin Gakkel Ridge 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1999

Authors and Affiliations

  • S. S. Drachev
    • 1
    • 2
  • G. L. Johnson
    • 3
  • S. W. Laxon
    • 4
  • D. C. McAdoo
    • 5
  • H. Kassens
    • 2
  1. 1.P.P. Shirshov Institute of OceanologyMoscowRussia
  2. 2.GEOMAR Forschungszentrum für marine GeowissenschaftenKielGermany
  3. 3.University of AlaskaFairbanksUSA
  4. 4.Space and Climate Physics Department MSSLUniversity College LondonDorking SurreyUK
  5. 5.NOAA, NODC, LSASilver SpringUSA

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