SLIP-MOTION ESTIMATION ALONG THE OVACIK FAULT NEAR ERZINCAN (TURKEY) USING ERS-1 RADAR IMAGE - EVIDENCE OF IMPORTANT DEFORMATION INSIDE THETURKISH PLATE

A synthetic aperture radar ERS-1 scene, used to complement a Landsat T M scene, allows better understanding of the structure of the active Ov acik fault, southwest of Erzincan (Turkey). The radar image shows that the Ovacik fault is interrupted at its crossing point with the Kemali ye fault. Recent compressive displacements have reactivated the Kemali ye fault, while a pull-apart basin has been generated along the Ovacik fault. Estimates of offsets of major rivers and analysis of the compl ex fault geometry give an estimated left-lateral strike slip displacem ent of 12.5-20 km along the Ovacik fault for the last 13 Ma, which is similar to the rate of movement along the East Anatolian fault located in the east and forming the boundary of the Turkish plate.