Orientations of palaeotectonic features as a key to understanding the neotectonic block rotation of the Kocaeli peninsula, NW Turkey

Gurbuz A.

INTERNATIONAL GEOLOGY REVIEW, cilt.51, sa.4, ss.329-344, 2009 (SCI-Expanded, Scopus) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 51 Sayı: 4
  • Basım Tarihi: 2009
  • Doi Numarası: 10.1080/00206810802655963
  • Dergi Adı: INTERNATIONAL GEOLOGY REVIEW
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.329-344
  • Anahtar Kelimeler: palaeotectonic, neotectonic, block rotation, strike-slip tectonics, Istanbul zone, North Anatolian fault zone, NORTH ANATOLIAN FAULT, EASTERN MARMARA REGION, STRIKE-SLIP FAULTS, BLACK-SEA, TECTONIC EVOLUTION, SEISMIC DATA, SHEAR ZONE, SEDIMENTARY BASINS, CRUSTAL ROTATIONS, WESTERN PONTIDES
  • Ankara Üniversitesi Adresli: Evet

Özet

Due to northward subduction of Neotethys, the Istanbul zone collided with the Sakarya zone in northwest Turkey during the early Eocene. Subsequently, this region was subjected to compressional forces during the late Eocene-early Miocene period. Folds, thrusts and reverse faults developed approximately parallel to long axes of the Istanbul zone. NNW-SSE oriented conjugate strike-slip faults developed with continued contraction. In addition to the orientations of palaeotectonic features, the morphotectonic, stratigraphic and seismic characteristics expose differences between the northeastern Marmara peneplain and the southern Black Sea highland. This study reports causes of this diversity reflecting the neotectonic evolution of the Istanbul zone. The diversity is related to the clockwise rotation of the Kocaeli peninsula between two dextral zone-bounding faults and two sinistral block-bounding faults. The principle factors of this process were the development of the North Anatolian fault zone (NAFZ) and the related evolution of the Adapazar-Karasu fault zone (AKFZ), the Bosphorus fault zone (BFZ) and the Northern Boundary fault (NBF).