No 4-5 (2006): Ukrainian Antarctic Journal
Articles

New geophysical data about the inner structure of Drake Passage crust

S. Levashov
Institute of applied problems of Ecology, Geophysics and Geochemistry, Kyiv
I. Korchagin
S. I. Subbotin Institute of geophysics of NAS of Ukraine, Kyiv
Yu. Kozlenko
S. I. Subbotin Institute of geophysics of NAS of Ukraine, Kyiv
V. Solovyov
S. I. Subbotin Institute of geophysics of NAS of Ukraine, Kyiv
Published December 15, 2006
Keywords
  • West Antarctic region,
  • Drake Passage,
  • magnetic anomalies,
  • vertical electric-resonance sounding survey,
  • deep crustal structure

Abstract

The Ukrainian Antarctic expeditions 1997-2004 years provided new geophysical data for many West Antarctica bottom structures. Gravity, magnetic- and electromagnetic surveys of Drake Passage made near the Antarctic Peninsula also. New obtained results for the tectonic structures enabled to specify the age of the formation of some blocks, separate local crustal inhomogeneities, specify the schemes of the structural division of the continental margin of Antarctica. A great effect of the tectonic factors on the formation of the inhomogeneous sediments (100m to 2,5km thick) and existence of some intrusion zones and tectonically active fracture zones in Drake Passage has been detected.