Paleo-exhumation histories of the Sakarya and the Istanbul Zones of the Western Pontides, the Almacık Block and its surroundings, NW Turkey

A belt of Paleocene turbidites with olistostromes, the Abant Formation, crops out for 350 km along the Intra-Pontide Suture in northern Turkey. The Suture constitutes the contact between two major Pontide tectonic units, the Istanbul and Sakarya zones, and the Abant Formation was used as evidence for the Paleocene - early Eocene closure of the Intra-Pontide ocean. We mapped and studied the Abant Formation along the Intra-Pontide Suture. The Abant Formation consists of deformed Paleocene siliciclastic turbidites with mass flows. The blocks in the olistostromes are mainly Late Cretaceous pelagic limestones; there are also Late Jurassic – Early Cretaceous, Late Cretaceous and Paleocene shallow marine limestone blocks. Other rare block types include late Neoproterozoic and Permian granites, basalt, chert and serpentinite. The ophiolitic blocks make up less than 5% of the Abant Formation. Most of the blocks were derived from the south, from the Sakarya Zone; detrital zircon ages from the turbidite sandstones also indicate a predominantly southern source. The Abant Formation was deposited in a foreland basin, which was formed during the Paleocene collision between the Pontides and the Anatolide-Tauride Block. The basin was preferentially located on the Intra-Pontide Suture, because the Suture constituted an old crustal lineament. Thematic collection: This article is part of the Ophiolites, melanges and blueschists collection available at: https://www.lyellcollection.org/topic/collections/ophiolites-melanges-and-blueschists Supplementary material: https://doi.org/10.6084/m9.figshare.c.7257811

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Paleo-exhumation histories of the Sakarya and the Istanbul Zones of the Western Pontides, the Almacık Block and its surroundings, NW Turkey

Cited by 3 publications

References 98 publications

No sediment transport across the Tethys ocean during the latest Cretaceous: detrital zircon record from the Pontides and the Anatolide–Tauride Block

No sediment transport across the Tethys ocean during the latest Cretaceous: detrital zircon record from the Pontides and the Anatolide–Tauride Block

Magma nature and tectono-magmatic context of the Eocene Uludağ granitoids (NW-Türkiye): Insights into the Cenozoic geodynamics of the Tethyan Orogenic Belt

Significance of the Paleocene olistostrome–turbidite belt (Abant Formation) along the Intra-Pontide Suture, northern Turkey

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