GPS results for Macedonia and its importance for the tectonics of the Southern Balkan extensional regime |
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| Authors: | B Clark Burchfiel Robert W King Angel Todosov Valentin Kotzev Nikola Durmurdzanov Todor Serafimovski Bilbil Nurce |
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| Institution: | aMassachusetts Institute of Technology, Cambridge, MA, USA;bMladinska 19, Strumica, Macedonia;cCentral Laboratory of Geodesy, Bulgarian Academy of Sciences, Sofia, Bulgaria;dFaculty of Mining and Geology, Stip, University of “St. Cyril and Methodius”, Skopje, Macedonia;eDepartment of Geodesy, Faculty of Construction Engineering, Tirana, Albania |
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| Abstract: | GPS results from 25 stations in Macedonia measured in 1996 and 2000 show that Macedonia moves SSE relative to Eurasia essentially as a single crustal piece along with parts of westernmost Bulgaria. Geological studies show active N–S normal faults and two NNW-striking right-lateral faults in western Macedonia, and NW-trending left-lateral faults SE Macedonia, with a region in central Macedonia essentially devoid of active faults. Distribution of seismic activity supports the geological studies. However, the GPS results cannot discriminate the active faulting, except perhaps in the northern part of Macedonia in the Skopje and adjacent areas, where active ~NS extension occurs. Slip-rates on the strike-slip faults must be low, in the range of 0–2 mm/year. There is a progressive increase in GPS velocities southward in northern Greece toward the North Anatolian fault zone, across which the velocities increase and change direction dramatically. |
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| Keywords: | Macedonia Gps results Active tectonics Seismicity |
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