The geochronology and origin of mantle sources for late cenozoic intraplate volcanism in the frontal part of the Arabian plate in the Karacadağ neovolcanic area of Turkey. Part 1. The results of isotope-geochronological studies

Convergence-aligned foreland magmatism in the Arabia–Anatolia Collision: geochronological evidence from the Karacadağ Volcanic Complex, south-east Turkey

“…Our dataset contains a single new analysis from the Ovabağ Phase. The youth of these rocks makes their analysis more challenging, but sample DO-62 gave an isochron age of 0.29 ± 0.13 Ma, which is within the uncertainty of K/Ar measurements (Keskin et al, 2012a) and is consistent with the freshness of these flows.…”

“…The isochron age of 1.41 ± 0.20 Ma for DK-25 lies within the range measured for groups K1 and K2. For DK-24, the isochron age of 4.50 ± 0.12 Ma suggests that this lava is slightly older than any of the other Karacadağ Phase lavas analysed either in this work or previously (Keskin et al, 2012a and references therein).…”

“…However, even allowing for uncertainty on this measurement, this is still sufficient to suggest that the Siverek Phase was active as early as 17 Ma during the Middle Miocene, and possibly the Early Miocene. Keskin et al (2012a) proposed that Karacadağ Phase magmatism proceeded through different types of eruptive activity. They found that at ~3.9 Ma, lava plateaux and pyroclastic flows formed to the east and south of the site of the Karacadağ ridge.…”

“…We present new geochronological data for Neogene to Quaternary lavas from the Karacadağ Volcanic Complex (KVC) in the foreland of the Arabia-Anatolia collision zone (Figures 1-3). This complex has been subject to several recent geologic and petrologic studies (Lustrino et al, 2010(Lustrino et al, , 2012Ekici et al, 2012Ekici et al, , 2014Koçbulut et al, 2013;Keskin et al, 2012aKeskin et al, , 2012bSeyitoğlu et al, 2017) that have substantially augmented our prior understanding of both magma sources and magmatic plumbing (Pearce et al, 1990). We present new 40 Ar age data to show that the Plio-Pleistocene magmatic history of the northern Arabian Plate is intimately linked to tectonic and neighbouring structural features of the upper crust, providing an additional constraint on the development of these structures.…”

“…Karacadağ. This is a north-south striking shield volcano of approximately 25 km in length ( Figure 3) that was constructed during the Late Miocene to Pleistocene as a series of vents and cones erupting alkali basaltic and basanitic lavas above a presumed fissure system (Ercan et al, 1990;Pearce et al, 1990;Adiyaman and Chorowicz, 2002;Keskin, 2003Keskin, , 2012aKeskin, , 2012bŞen et al, 2004;Brigland et al, 2007;Demir et al, 2007;Lustrino et al, 2010;Ekici et al, 2014). The third and final phase, called the Ovabağ Phase, comprises low volumes of alkali basalt and basanite that were erupted around the village of Ovabağ, to the east of Mt.…”