TERRAPUB Earth, Planets and Space

Earth Planets Space, Vol. 52 (No. 10), pp. 747-751, 2000


Active tectonics of the Black Sea with GPS

Ergin Tari1, Muhammed Sahin1, Aykut Barka2, Robert Reilinger3, Robert W. King3, Simon McClusky3, and M. Prilepin4

1Department of Geodesy and Photogrammetry, Istanbul Technical University, 80626 Maslak, Istanbul, Turkey
2Eurasian Institute of Earth Sciences, Istanbul Technical University, 80626 Maslak, Istanbul, Turkey
3Department of Earth, Atmospheric, and Planetary Sciences, MIT, Cambridge 02139, U.S.A.
4Joint Institute of Physics of the Earth, Moscow 123810, Russia

(Received December 25, 1999; Revised June 30, 2000; Accepted July 6, 2000)

Abstract: The Black Sea occurs within the Anatolian sector of the Alpine-Himalayan orogenic system. In this region northward moving African and Arabian plates collide with Eurasian plate. From this collision the Anatolian block moves westward with a rotation pole located approximately north of Sinai peninsula. Tectonic styles and rates in the circum Black Sea and along the Crimea have been poorly known. A GPS project was initiated in 1995 with the collaboration between Istanbul Technical University, MIT and Joint Institute of Physics of the Earth (Moscow). To carry out the project, two GPS campaigns were performed. Data have been analysed by the well-known GPS processing program, GAMIT which is a comprehensive GPS analysis package, and GLOBK, a Kalman filter. This paper presents the important outputs from the two GPS campaigns and gives suggestions for the future investigations in the region. The important outcome of the project is that the N-S motions along mostly in the Eastern margin of the Black Sea are in a few mm/year, such as SINO, a southern coast site, with a rate of 1.4 ± 1.7 mm/year in NW direction, and GELE, a northern coast site, with a rate of 2.2 ± 2.8 mm/year in SE direction, while the velocities in the Anatolian region are approximately 10-20 ± 3-5 mm/year.

Corresponding author E-mail: sahin@itu.edu.tr

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