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Geotectonics

, Volume 49, Issue 1, pp 3–26 | Cite as

Tectonics of the South Anyui Suture, Northeastern Asia

  • S. D. SokolovEmail author
  • M. I. Tuchkova
  • A. V. Ganelin
  • G. E. Bondarenko
  • P. Layer
Article

Abstract

The South Anyui Suture separates the structures of the Chukotka and Verkhoyansk-Kolyma Fold Areas. The suture consists of ophiolites, island-arc rocks, deformed Upper Triassic and Upper Jurassic-Lower Cretaceous turbidites, and accretionary-type terrigenous melange with blocks of oceanic crust. Two main stages in the geological history of the South Anyui Suture are distinguished: (1) the oceanic stage (Paleozoic-onset of Late Jurassic), when the vast Protoarctic ocean with ensimatic island arcs existed, and (2) the collisional stage (Volgian Age-Early Cretaceous) that started with the transformation of the ocean into the residual and closing South Anyui turbidite basin and was completed by the formation of a fold-nappe structure in the Hauterivian-Barremian. In the course of collision, the oceanic and island complexes were thrust to the north over the passive margin of Chukchi Peninsula. The thrusting was followed by the formation of south-vergent retrocharriages and then by final strike-slip faulting. In the Aptian-Albian, collision gave way to extension with the formation of metamorphic cores and superposed orogenic basins.

Keywords

geodynamics collision South Anyui Suture ophiolites turbidite island arc Paleozoic Mesozoic 

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© Pleiades Publishing, Inc. 2015

Authors and Affiliations

  • S. D. Sokolov
    • 1
    Email author
  • M. I. Tuchkova
    • 1
  • A. V. Ganelin
    • 1
  • G. E. Bondarenko
    • 2
  • P. Layer
    • 3
  1. 1.Geological InstituteRussian Academy of SciencesMoscowRussia
  2. 2.OAO N K Rosneft OAOMoscowRussia
  3. 3.University of AlaskaKoyukuk DriveUSA

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