The Izmir‐Ankara suture represents part of the boundary between Laurasia and Gondwana along which a wide Tethyan ocean was subducted. In northwest Turkey, it is associated with distinct oceanic subduction‐accretion complexes of Late Triassic, Jurassic and Late Cretaceous ages. The Late Triassic and Jurassic accretion complexes consist predominantly of basalt with lesser amounts of shale, limestone, chert, Permian (274 Ma zircon U‐Pb age) metagabbro and serpentinite, which have undergone greenschist facies metamorphism. Ar‐Ar muscovite ages from the phyllites range from 210 Ma down to 145 Ma with a broad southward younging. The Late Cretaceous subduction‐accretion complex, the ophiolitic melange, consists of basalt, radiolarian chert, shale and minor amounts of recrystallized limestone, serpentinite and greywacke, showing various degrees of blueschist facies metamorphism and penetrative deformation. Ar‐Ar phengite ages from two blueschist metabasites are ca. 80 Ma (Campanian). The ophiolitic melange includes large Jurassic peridotite‐gabbro bodies with plagiogranites with ca. 180 Ma U‐Pb zircon ages. Geochronological and geological data show that Permian to Cretaceous oceanic lithosphere was subducted north under the Pontides from the Late Triassic to the Late Cretaceous. This period was characterized generally by subduction‐accretion, except in the Early Cretaceous, when subduction‐erosion took place. In the Sakarya segment all the subduction accretion complexes, as well as the adjacent continental sequences, are unconformably overlain by Lower Eocene red beds. This, along with the stratigraphy of the Sakarya Zone indicate that the hard collision between the Sakarya Zone and the Anatolide‐Tauride Block took place in Paleocene.

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作为三叠纪至白垩纪板块边界的伊兹密尔-安卡拉缝合线——来自安纳托利亚中部的数据

伊兹密尔-安卡拉缝合线代表了劳亚大陆和冈瓦纳大陆之间边界的一部分，广阔的特提斯洋沿该边界俯冲。在土耳其西北部，它与晚三叠世、侏罗纪和晚白垩世不同的海洋俯冲-增生杂岩有关。晚三叠世和侏罗纪增生杂岩主要由玄武岩和少量页岩、石灰岩、燧石、二叠纪（274 Ma 锆石 U-Pb 年龄）变辉长岩和蛇纹岩组成，它们经历了绿片岩相变质作用。千枚岩的 Ar-Ar 白云母年龄范围从 210 Ma 到 145 Ma，具有广泛的向南年轻化。晚白垩世俯冲增生复合体，蛇绿混杂岩，由玄武岩、放射虫燧石、页岩和少量重结晶石灰岩、蛇纹岩和灰岩组成，显示出不同程度的蓝片岩相变质和穿透变形。来自两个蓝片岩变碱性矿物的 Ar-Ar phentite 年龄约为。80 Ma（坎帕尼亚）。蛇绿混杂岩包括大型侏罗纪橄榄岩-辉长岩体和斜长花岗岩。180 Ma U-Pb 锆石年龄。年代学和地质资料表明，从晚三叠世到晚白垩世，二叠纪到白垩纪的海洋岩石圈在桥底下向北俯冲。这一时期除早白垩世发生俯冲-侵蚀外，一般以俯冲-增生为特征。在萨卡里亚段，所有的俯冲增生复合体以及相邻的大陆层序都被下始新世红层不整合地覆盖。这，