Tuesday, 28 August 2007
2.PS-58

Tectonic deformation models for South Shetland Islands, Bransfield Sea and the Antarctic Peninsula

Manuel Berrocoso, M. Eva Ramírez, Alberto Fernández-Ros, Alejandro Pérez-Peña, and José M. Enríquez de Salamanca. Astronomy, Geodesy and Cartography Laboratory, Department of Mathematics, Universidad de Cádiz, Facultad de Ciencias, Campus de Puerto Real, s/n, 11510, Puerto Real (Cádiz), Spain

This abstract presents the last tectonic displacement models estimated for the area defined by the South Shetlands Islands, the Bransfield Sea and the Antarctic Peninsula. This environment constitutes one of the most interesting geodynamical areas in the Antarctica due to the convergence of several tectonic plates. The limits of some of these plates are still uncertain, especially those ones related to the plates bounding Deception Island Volcano. After the 1998 volcanic crisis on Deception Island, it was observed an extensional radial process around the island. After this period, the displacement for this island seems to migrate trending to the modulus and direction of the Antarctic Plate, and revealing different patterns of displacement for Deception Island and the rest of the islands in the archipelago, what has motivated the extension of the RGAE geodetic network. Nowadays it consists of 12 stations distributed along the South Shetland Archipelago and the Antarctic Peninsula.

[Manuscript]

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