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Oceanology

, Volume 54, Issue 3, pp 365–373 | Cite as

The stages of the development of the basin of the Bransfield Strait

  • Al. A. Schreider
  • A. A. Schreider
  • E. I. Evsenko
Marine Geology

Abstract

The study of the sedimentary body of the Bransfield Strait has made it possible to identify several sedimentary complexes, to construct the first electronic charts for the acoustic basement, and to establish four stages of the evolution of its floor, which updates the previous knowledge about the formation of the strait. At the first stage, there was an increase in tension stresses that were accompanied by the local splits of the continental crust at the periphery of the Antarctic Peninsula. At the second stage, a graben-like structure filled with the Lower stratigraphic complex was formed northward of the Antarctic Peninsula. At the third stage, the continuing processes of extension led to intensive explosive activity of the growing volcanic structures and filling of the graben with sediments of the Middle seismostratigraphic complex. The fourth stage, which has continued until recently, is characterized by quasi-linear localization of the major centers of volcanic activity in the band closer to the South-Shetland Islands and the formation of the Upper seismostratigraphic sedimentary complex. The evolution of the floor of the Bransfield Strait reflects the process of penetration of the American-Antarctic ridge to the continental lithosphere of the Antarctic Peninsula for the last million years.

Keywords

Antarctic Peninsula Satellite Altimetry South Shetland Island Acoustic Basement Scotia 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

© Pleiades Publishing, Inc. 2014

Authors and Affiliations

  • Al. A. Schreider
    • 1
  • A. A. Schreider
    • 2
  • E. I. Evsenko
    • 2
  1. 1.OOO NIIGazekonomikaMoscowRussia
  2. 2.Shirshov Institute of OceanologyRussian Academy of SciencesMoscowRussia

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