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G.B. Udintsev[48], A.F. Beresnev[49], N.A. Kurentsova[50], A.V. Koltsova[51], K.G.Domoratskaya[52], H.W. Schenke[53], Ott N.[54], König M.[55], Jokat W.[56], Bakhmutov V.G.[57], V.D. Soloviev[58], S.P. Levashov[59], N.A. Yakimchuk[60], I.N. Korchagin[61]. Drake Passage and Scotia Sea – the Oceanic gates of the Western Antarctica
Abstract
The bathymetry and geophysics of the floor of the Drake Passage and the Scotia Sea is rather well studied in general, and was discussed in many publications. However the tectonics and geodynamics of this belt until now are unclear and find equivocal interpretation. The floor of this belt usually is considered as the collage of small fragments of relict continental bridge and wide oceanic plates, created by spreding at wide-scale horizontal movements of lithospheric plates. The authors propose alternative hypothesis about nature of the crustal bekt of the Drake Passage and the floor of the Scotia Sea as the areal of large fragments of the relict of intercontinental bridge, experienced basification and breaking into large fragments in the conditions of temperate extension and short-lived local rifting.
