![]() It is shown that the Crimea, Caucasus, and Kopet Dagh fold systems make up a single whole unified by a lithospheric strike-slip fault zone of concentrated dislocations. The slickensides, subsidiary fractures, cataclastic zone, fracture-controlled drainage pattern, right lateral stream deflections, deformation in the Quaternary unit observing in the seismic reflection sections, and seismicity of the region all indicate that the IB is an active right lateral strike-slip fault. The IB has also a regional tectonic importance as a boundary fault between the contractional and the extensional regions in central Anatolia considering that it is the southern limit of the contraction-related structures in the west-southwest of Ankara.Ĭrimea-Kopet Dagh zone of concentrated orogenic deformations as a transregional late collisional right-lateral strike-slip fault The right lateral strike-slip Ilıca branch (IB is an approximately 100-km-long fault and it is composed of several segments in a northwest-southeast direction. Its southeastern part is generally divided into three branches, namely the Ilıca, Yeniceoba, and Cihanbeyli from north to south, respectively. It separates the west  Anatolian extensional province and the strike-slip induced northwest central Anatolian contractional area in the Anatolian Block. THE ILICA BRANCH OF THE SOUTHEASTERN ESKIÅžEHIR FAULT ZONE: AN ACTIVE RIGHT LATERAL STRIKE-SLIP STRUCTURE IN CENTRAL ANATOLIA, TURKEYĭirectory of Open Access Journals (Sweden)įull Text Available The EskiÅŸehir Fault Zone is one of the prominent neotectonic structures of Turkey. If this conclusion is correct, the east- striking left- lateral faults and the crustal blocks between them are rotating clockwise at 1-2 deg/Myr, the east-west dimension of eastern Tibet is shortening at 10-20 mm/yr, and little material is moving eastward out of India's path into Eursasia by left- lateral simple shear. It is also concluded here that the image of lateral transport on such faults, known also as continental escape, extrusion, or expulsion, is an illusion, and that instead the left- lateral slip on east- striking plates in eastern Tibet is a manifestation of north- striking right-lateral simple shear. The dog-leg-shaped Philippine Trench is propagating southward across the fragmented Halmahera arc terrane and its southern segment could reactivate a former strike-slip fault zone.Right-lateral shear and rotation as the explanation for strike-slip faulting in eastern Tibetīounds are placed here on the rate of rotation proposed by Cobbold and Davy (1988) for the major strike-slip faults in the eastern Tibetan Plateau. The Miangas-Pujada-Talaud ridge is part of the Sangihe forearc, and the ophiolites could represent its basement, uplifted along the outer arc ridge. There is no clear evidence for accreted oceanic crust belonging to the recently subducted Molucca Sea. It could be either an accretionary wedge developed at the deformed leading edge of the Sangihe forearc or be part of a former intra-arc basin which was part of the colliding Halmahera arc terrane. The thickness of this wedge cannot be explained by subduction along the very young Philippine Trench. East of the Miangas-Pujada-Talaud ridge there is a wide sedimentary wedge separated from the Snellius Ridge to the south by the major NW-SE crustal discontinuity. Snellius volcanic plateau, a fragment of the Halmahera arc terrane, has induced the formation ofĪ new plate boundary, the Philippine Trench along what is interpreted as a former strike-slip fault zone. South of 6°N the westward subduction of the buoyant North of 6°N the Philippine Trench inner wall isĭissected by NW-SE trending left-lateral strike-slip faults, resulting from the dominantly obliqueĬonvergence between colliding arcs. Interpreted as a left-lateral strike-slip fault. Of the ridge very contrasting terranes are separated by a major NW-SE crustal discontinuity The central part of the Molucca Sea appears to be a backstop within the Sangihe forearc. Presence of an almost complete Sangihe arc and forearc. Preliminary interpretation of these data reveals the A swath mapping, gravity and single channel seismic survey was carried out in the ![]()
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