K-Ar dating, whole-rock and Sr-Nd isotope geochemistry of calc-alkaline volcanic rocks around the Gümüşhane area: implications for post-collisional volcanism in the Eastern Pontides, Northeast Turkey

Petrology and geochemistry of the Karaj Dam basement sill: Implications for geodynamic evolution of the Alborz magmatic belt

“…10); this is identical to data from an Eocene plutonic body in the central part of the UDMA(Ahmadian et al, 2009) and overlaps with the compositions of the middle Eocene volcanic rocks of the ABM ( 87 Sr/ 86 Sr i = 0.70404-0.70692 and 143 Nd/ 144 Nd i = 0.51241-0.51274; Nd (35) = +2.97 to −3.44;Asiabanha and Foden, 2012). The samples are also found to lie along a trend with the rocks from the Eastern Pontides of Turkey(Karsli et al, 2012;Temizel et al, 2012;Arslan et al, 2013;Aslan et al, 2014) and young volcanics from the Lesser Caucasus…”

40Ar-39Ar geochronology and petrogenesis of postcollisional trachytic volcanism along the İzmir-Ankara-Erzincan Suture Zone (NE, Turkey)*

“…Thus, we suggest that the trace element ratios/plots used for understanding of the evolution of the arc magmatism can also be reliable tools to investigate the presence and behavior of sedimentary melts/fluids, subduction components in mantle source areas of postcollisional magmatics. (Gülmez et al, 2013;Kasapoğlu et al, 2016) and middle Eocene volcanics from the Eastern Pontides (Kaygusuz et al, 2011;Temizel et al, 2012Temizel et al, , 2016Arslan et al, 2013;Aslan et al, 2014;Yücel et al, 2017) are also plotted. Data for lithospheric mantle array and MORB from Wilson (1989) and Gill (1981).…”

“…The vanishing of the northern branch of the Neo-Tethyan ocean during the Cretaceous and subsequent collision of the Pontides and Anatolide-Tauride microcontinents with the CACC in the Paleocene gave rise to a long and narrow ophiolitic mélange belt called the IAESZ at the northern part of the Anatolian Plate (Şengör and Yılmaz, 1981;Okay and Tüysüz, 1999) (Figure 1a). Around both sides and along this suture zone, postcollisional Eocene magmatism (particularly Middle Eocene) developed through the western to eastern part of the Anatolian Plate and is represented by granitoids (Harris et al, 1994;Genç and Yılmaz, 1997;Topuz et al, 2005;Arslan and Aslan, 2006;Okay and Satır, 2006;Karslı et al, 2007Karslı et al, , 2011Boztuğ, 2008;Karacık et al, 2008;Ustaömer et al, 2009;Altunkaynak et al, 2012;Gülmez et al, 2013;Öztürk, 2015, Özdamar et al 2017), gabbroic intrusions (Boztuğ et al, 1998;Temizel et al, 2014;Eyuboglu et al, 2016), and calcalkaline, mildly alkaline, and potassic/shoshonitic volcanic products (Figure 1b;Peccerillo and Taylor, 1976;Keskin et al, 2008 and references therein; Karslı et al, 2011, Kaygusuz et al, 2011Arslan et al, 2013 and references therein; Aydınçakır and Şen, 2013;Dokuz et al, 2013;Gülmez et al, 2013;Aslan et al, 2014;Aydınçakır, 2014, Sipahi et al, 2014Yücel et al, 2014;Kasapoğlu et al, 2016;Temizel et al, 2016).…”

Cenozoic forearc gabbros from the northern zone of the Eastern Pontides Orogenic Belt, NE Turkey: Implications for slab window magmatism and convergent margin tectonics

“…Although several magmatic complexes from this belt have been widely studied in the recent years (e.g., Topuz et al, 2005;Arslan and Aslan, 2006;Karslı et al, 2010;Dilek et al, 2010, 2011a, 2011b, 2013a2014), the origin and geodynamic setting of the late Mesozoic-Cenozoic magmatism remain controversial due to lack of systematical geological, geochemical and chronological data (Eyuboglu et al, 2011a). The general consensus is that the late Mesozoic-Cenozoic igneous activity is related to nothward subduction of an oceanic lithosphere (Paleotethys or…”