- West Antarctica,
- crustal structure,
- geophysical data
Abstract
The Ukrainian Antarctic expeditions acquired new geoelectrical data ('short-impulse electromagnetic field formation' – FSPEF, and 'vertical electric-resonance sounding' – VERS) along profiles across Drake Passage and continental shelf of Antarctic Peninsula. The electromagnetic experiments yielded new data set with unique information about the inner structure and new values of the depth of the Moho discontinuity of West Antarctica region. Deep crustal heterogeneities of the Palmer Deep Basin that were obtained from the VERS- profiles data could be connected with processes of tectonic transformations of the Antarctic Peninsula shelf structures. Possibly, the conformities of continental shelf glacial streams may be explained exactly by a tectonic factor of recent geological past. New information about sediment distribution and inner crustal structure has an important value for searching and prospecting the hydrocarbon deposits of Palmer Deep region
References
- Levashov, S.P., Yakymchuk, M.A., Korchagin, I.N., Pyschaniy, Ju.M., & Yakymchuk, Ju.M. (2003). Electric-resonance sounding method and its application for the ecological, geological-geophysical and engineering-geological investigations. 66th EAGE Conference and Technical Exhibition. Paris, France, 7–10 June 2003. CD-ROM Abstracts volume.
- Levashov, S.P., Yakymchuk, N.A., Korchagin, I.N., Solovyov, V.D., & Kozlenko, Yu.V. (2007). New data about crustal inhomogineities and fluid regime features of West Antarctica bottom structures. 69-th EAGE Conference and Technical Exhibition. London, United Kingdom, 11–14 June 2007. CD-ROM Abstracts volume. P013.
- Levashov, S.P., Yakymchuk, N.A., Korchagin, I.N., Bakhmutov, V.G., Solovyov, V.D., & Bozhezha, D.N. (2007). Drake Passage and Bransfield Strait – new geophysical data and modelling of the crustal structure. In: A.K. Cooper, C.R. Raymond et al. (Eds.), Antarctica: A Keystone in a Changing World – Online Proceedings of the 10th ISAES X, USGS Open-File Report 2007–1047, Extended Abstract 028.
- Rebesco, M., Camerlenghi, A., De Santis., L., Domack, E., Kirby, M. (1998). Seismic stratigraphy of Palmer Deep: a fault-bounded late Quaternary sediment trap on the inner continental shelf, Antarctic Peninsula Pacific margin. Marine geology, 151(1), 89–110.
- Domack, E.W., Amblas, D., Gilbert, R., Brachfeld, S.A., Camerlenghi, A., Rebesco, M., Canals, M., & Urgeles, R. (2006). Subglacial morphology and glacial evolution of the Palmer deep outlet system, Antarctic Peninsula. Geomorphology, 75, 125-142.
- Sroda, P., Grad, M., & Guterch, A. (1997). Seismic Models of the Earth's Crustal structure between the South Pacific and the Antarctic Peninsula. The Antarctic Region: Geological Evolution and Processes, 685–689.