HR: 0800h
AN: T31B-0474    [Abstracts]
TI: Geodynamics of the Carpathian Bend Zone: interconnection between surface and deep processes
AU: * Mocanu, V
EM: vi_mo@yahoo.com
AF: University of Bucharest, Dept. of Geophysics, Traian Vuia St., Bucharest 2, 020956, Romania
AU: Munteanu, L
EM: laurentiu_munteanu2000@yahoo.com
AF: National Institute of Earth Physics, 12 Calugareni St., Bucharest-Magurele, 077125, Romania
AU: Munteanu, A
EM: alexis21cv@yahoo.com
AF: National Institute of Earth Physics, 12 Calugareni St., Bucharest-Magurele, 077125, Romania
AB: The Carpathian Bend Zone is a key segment of the Alpine-Himalyan Belt and represent the home of a very particular seismic activity: regular very strong earthquakes are being generated in a very narrow, deep volume of a finger-shape, vertically distributed. The nature of processes involved is instill not yet understood and could be eventually related to several main hypothesis, like: (1) subduction of an oceanic lithosphere (and eventually a remnant of this is just now detaching from the continental lithosphere of the East European and Moesian Platforms, (2) the oceanic slab subduction ended sometimes in (late) Miocene and then a part of the continental lithosphere of the mentioned platforms has been delaminated. Various models of the lithosphere – astenosphere system take into account for example the seismic attenuation and share wave splitting. The intricate geometry of the lithosphere – astenosphere system as well as the mantle flow around the "slab" generates intriguing questions. We add another constraint to the various methodological approaches by taking into account the kinematics of the crustal blocks as suggested by robust outcomes of an extended and long-term investigated satellite geodesy network consisting of permanent and campaign stations. We will integrate results of GPS investigations with other, complementary results from other investigations techniques in order to test the deep feedback to the Tethyan closure, including the astenosphere – lithosphere system, trying to explain the very unusual high Carpathian seismicity and the geometry of the high velocity body beneath the Carpathian Bend Zone and the mantle flow around it and related surface processes.
DE: 1038 Mantle processes (3621)
DE: 7218 Lithosphere (1236)
DE: 8107 Continental neotectonics (8002)
DE: 8108 Continental tectonics: compressional
DE: 8120 Dynamics of lithosphere and mantle: general (1213)
SC: Tectonophysics [T]
MN: 2007 Fall Meeting