Ukrainian Antarctic journal

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

The crustal structure of Deception Island (West Antarctica) by geophysical data

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

Abstract

New results of the geophysical studies of deep inhomogeneities of crustal structures distribution that were obtained in the SW part of Bransfield Strait near the present Deception Island volcano are discussed.

The geophysical data interpretation suggests a local character of the present submarine volcanic activity in the SE part of Deception Island. The magma source is associated with a rather local tectonic disturbance at a depth above 6km. The formation and evolution of this disturbance may caused by features of the distribution of marginal tensions during the interaction of the tectonic continuation of the Hero Fracture Zone and the tectonic disturbances of Bransfield Strait Fracture Zone in the area of Deception Island.

References

  1. Bakhmutov, V.G., Kozlenko, Yu.V., Korchagin, I.N., Orlova, M.I., Solov`ev, V.D., Shepel`, S.I., … Yakimchuk, Yu.N. (2001). Geofizicheskie issledovaniya v Ukrainskix morskix antarkticheskix e`kspediciyax (po materialam 60 i 61-go rejsov NIS «E`rnst Krenkel`». [Geophysical research in the Ukrainian Antarctic sea expeditions (based on the materials of the 60th and 61st cruises of the Ernst Krenkel]. In-t geofiziki NAN Ukrainy`, Kyiv, pp. 323. Dep. vGNTBUkrainy` 9.04.2001.№ 70-Uk2001.
  2. Levashov, S.P., & Peschany`j, Yu.M. (2004). Kartograficheskie materialy` rezul`tatov geoe`lektricheskix rabot v rajone Antarkticheskogo poluostrova. [Cartographic materials of the results of geoelectric works in the area of the Antarctic Peninsula]. Materialy` ІX Ukrainskoj Antarkticheskoj e`kspedicii. Kyiv.
  3. Аshcroft, W.A. (1972). Crustal structure of the South Shetland Islands and the Bransfield Strait. British Antarctic Survey Scientific Reports, 66, 1–43.
  4. Barker, D.H.N., & Austin, J.A. (1998). Rift propagation, detachment faulting and associated magnetism in Bransfield Strait, Antarctic Heninsula. Journal of Geophysical Research, 103(B10), 24017–24043.
  5. Rey, J., Somoza, L., Martinez-Frias, J. (1991). Evidencias tectonicas, volcanicas e hidrotemales en isla Decepcion, relacionadas con elmarco geodinamico de la cuenca de Bransfield (Antartida). Actas del V simposio Espanol de estudios Antarticos, 209–221.