Türkiye Jeoloji Bülteni

Tectonics of the Region Between Tercan (Erzincan) and Aşkale (Erzurum)

Abstract: Pre - Upper Maastrichtian is the first emplacement period of the ophiolitic melange which is the Neotethys product. During the interval of the Upper Cretaceous - Oligocene, ophiolitic malenge becamed thicker by thrusting due to the regional compressional tectonism and local emergence was an investigation area. Intermountain bassinsinfilled by continental elastics were developed in the early Oligocene, in front of the thrusts with approximately E-Wtrending and inclined to the North (Çayırlı - Tercan basin). Tectonic features of different character have developed during pre - and post - late Miocene, in the study area. E- W trending thrusts, high angle reverse - faults and asymetricoverturned folds with E-W trending axis have developed before Late Miocene. Following Late Miocene, compressionhas been compensated by lateral - movements which coused NW - SE, NE - SW striking right and left - lateral strikeslip faults and shear fractures with the same orientation. These structural data show that the investigation area and surroundings are under - control of appoximately N - S striking compressive stress.