Active tectonics of the black sea with GPS

The Black Sea occurs within the Anatolian sector of the Alpine-Himalayan or ogenic system. In this region northward moving African and Arabian plates c ollide with Eurasian plate. From this collision the Anatolian block moves w estward with a rotation pole located approximately north of Sinai peninsula . Tectonic styles and rates in the circum Black Sea and along the Crimea ha ve been poorly known. A CPS project was initiated in 1995 with the collabor ation between Istanbul Technical University, MIT and Joint Institute of Phy sics of the Earth (Moscow). To carry out the project, two GPS campaigns wer e performed. Data have been analysed by the well-known GPS processing progr am, GAMIT which is a comprehensive GPS analysis package, and GLOBK, a Kalma n filter. This paper presents the important outputs from the two GPS campai gns 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 th e Eastern margin of the Black Sea are in a few mm/year, such as SINO, a sou thern coast site, with a rate of 1.4 +/- 1.7 mm/year in NW direction, and G ELE, a northern coast site, with a rate of 2.2 +/- 2.8 mm/year in SE direct ion, white the velocities in the Anatolian region are approximately 10-20 /- 3-5 mm/year.