Migration of the Upper Cretaceous subduction-related volcanism towards the back-arc basin of the eastern Pontide magmatic arc (NE Turkey)

Kinematic reconstructions and magmatic evolution illuminating crustal and mantle dynamics of the eastern Mediterranean region since the late Cretaceous

“…In the Pontides, predominant volcanic rocks were mostly emplaced between the late Turonian and latest Campanian (~90-70 Ma) (figure 5) and seem to display southward migration through time [Yılmaz et al, 1997;Bektaş et al, 1999;Okay et al, 2001b;Eyüboğlu et al, 2010], similar to magmatic products in the Balkans [Ciobanu et al, 2002;von Quadt et al, 2005;Kolb et al, 2012].…”

MINERALOGY AND GEOCHEMISTRY OF THE KOCADAL (TORUL, GÜMÜŞHANE, EASTERN BLACK SEA REGION, TURKEY) Zn-Pb-Ag, Au and Cu MINERALIZATIONS

“…Dacite porphyries have intrusive relationships with the Hamurkesen formation and the Gümüşhane granite. Because of these relationships, dacite porphyries can be correlated with the Lower Eocene Zigane granitoid (Ketin 1966;Bektaş et al, 1995;Karslı, 1996) present in the area, related to the magmatic arch which was active during Late Cretaceous-Early Eocene (Şengör and Yılmaz 1981;Okay and Şahintürk 1997;Bektaş et al, 1999;Şengör et al, 2003), (Figure 2). …”

“…The basal rock units present in the area are Paleozoic Kurtoğlu metamorphics . These rock units were intruded by Permo-Carboniferous granitic intrusives (Çoğulu, 1970;, developed from the southern plunge of northern branch of Paleo Tethys (Dewey et al, 1973;Şengör and Yılmaz, 1981;Bektaş et al, 1999;Eyüboğlu, 2010;Eyüboğlu et al, 2012). These units were discordantly overlain by volcano-sedimentary Hamurkesen formation of Lower-Middle Jurassic, characterizing rifting in marine environment related to the extensional tectonics (Eyüboğlu et al, , 2014.…”

Subduction-related Late Cretaceous high-K volcanism in the Central Pontides orogenic belt: constraints on geodynamic implications

“…Several researchers suggested that the eastern Pontides was a magmatic arc that occurred as a result of northward subduction of the Neotethys along the southern border of the Sakarya Zone Karsli et al, 2010;Şengör, Özeren, Genç, & Zor, 2003;Ustaomer & Robertson, 2010). Conversely, Dewey, Pıtman, Ryan, and Bonnın (1973), Bektaş, Şen, Atici, and Köprübaşi (1999), Eyuboglu, Chung, Santosh, Dudas, and Akaryalı (2011), and Eyuboglu, Santosh, Dudas, Chung, and Akaryalı (2011) proposed a southward subduction that continued uninterruptedly from the Paleozoic period until the end of the Eocene period.…”