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  • Hitrosti premikov ob prelom...
    Bojan Stopar; Marko Vrabec; Polona Pavlovčič Prešeren

    Geodetski vestnik, 01/2005, Letnik: 49, Številka: 3
    Journal Article

    We describe the first results of the GPS-observation processing in three successive GPS-campaigns from 1996, 1999, and 2002 of the Large Geodynamic Network of the Velenje Coal Mine. We present site velocities relative to the stable Eurasian plate, from which we derive the tectonic intepretation of active movements along the faults of the Periadriatic Fault System (PFS). As the PFS is a major post-collisional feature of the Alpine orogen, the study is interesting from regional point of view, as well as for intepreting the causes of earthquake activity in the wide area of the Velenje Coal Mine (in the Šaleška Valley region). Site velocities indicate predominately N- to NNEdirected movements in a range from 0.5 to 2mm/yr, which is consistent with the idea about the ongoing eastward extrusion of the Eastern Alpine domain at the rate of ~1.5 mm/yr, and the ~2mm/yr northward moving Adriatic microplate. PFS acts as the southern boundary of the extruding East Alpine domain, however, the deformation is not tied to a single dextral corridor, but is distributed over a wide area. First results have opened new questions, due to which the geodynamic network was expanded and measured in summer 2003 for the first time and will be reoccupied this September. Results from the expanded network will hopefully provide better understanding of active kinematics of the Šoštanj, Smrekovec and Labot faults.