Geology, geochemistry and Re-Os geochronology of the Jurassic Zeybek volcanogenic massive sulfide deposit (Central Pontides, Turkey)

A Jurassic volcanic passive margin in Iran and Turkey

“…5%-30% partial melting in an extensional tectonic regime with minor involvement of continental crust is suggested for the sources of tholeiitic to alkalic basaltic magma. We suggest two main scenarios for the SW Eurasian Jurassic extensional regime F I G U R E 4 Harker bivariant diagrams for Jurassic mafic samples (Bozorg Seghinsara et al, 2017;Çimen, 2020;Doaee et al, 2020;Dokuz et al, 2010;Dokuz & Sünnetçi, 2019;Eyuboglu et al, 2016;Galoyan et al, 2018;Genç et al, 2010;Günay et al, 2019;Lechmann et al, 2018;Şen, 2007) and mafic parts of the Early Jurassic ophiolites (Sarifakioğlu et al, 2009;Topuz, Göçmengil, et al, 2013;Uysal, Ersoy, et al, 2015) with SiO 2 contents between 45 and 52 wt%. F I G U R E 5 Mafic samples with higher contents of Fe 2 O 3 (t), TiO 2 and Y (Bozorg Seghinsara et al, 2017;Çimen, 2020;Doaee et al, 2020;Dokuz et al, 2010;Dokuz & Sünnetçi, 2019;Eyuboglu et al, 2016;Galoyan et al, 2018;Genç et al, 2010;Günay et al, 2019;Lechmann et al, 2018;Şen, 2007) and mafic parts of the Early Jurassic ophiolite (Sarifakioğlu et al, 2009;Topuz, Göçmengil, et al, 2013;Uysal, Ersoy, et al, 2015) (a and b) mainly plot in the tholeiitic and calc-alkaline field (Irvine & Baragar, 1971) Island arc, MORB and oceanic island basalts (Mullen, 1983) and (c) extensional tectonic regimes such as continental rift (Cabanis & Lecolle, 1989).…”

“…Due to the time progression of Jurassic intrusions in the central SaSZ and bimodal magmatism, a propagating continental rift was suggested for the C-SaSZ . In this discussion, we (Bozorg Seghinsara et al, 2017;Çimen, 2020;Doaee et al, 2020;Dokuz et al, 2010;Dokuz & Sünnetçi, 2019;Eyuboglu et al, 2016;Galoyan et al, 2018;Genç et al, 2010;Günay et al, 2019;Lechmann et al, 2018;Şen, 2007) and mafic parts of the Early Jurassic ophiolites (Sarifakioğlu et al, 2009;Topuz, Göçmengil, et al, 2013;Uysal, Ersoy, et al, 2015) Eurasia (Alavi, 1991;Zanchi et al, 2009;Karimpour et al, 2010;Hassanpour, 2021;Okay and Şahintürk, 1997). Others consider southward subduction of Palaeotethys beneath northern Turkey continued into Jurassic time to form a back-arc basin in the Sakarya Zone (Dokuz et al, 2010;Genç et al, 2010;Kandemir & Yilmaz, 2009;Karsli et al, 2017;Maffione & van Hinsbergen, 2018;Sengör & Yilmaz, 1981).…”

“…We correlated Jurassic members units and compiled whole-rock chemical and Sr-Nd isotopic data for 216 Early to Middle Jurassic igneous rocks in Turkey, Armenia and Iran from the literature (Bozorg Seghinsara et al, 2017;Çimen, 2020;Doaee et al, 2020;Dokuz et al, 2010;Dokuz & Sünnetçi, 2019;Eyuboglu et al, 2016;Galoyan et al, 2018;Genç et al, 2010;Günay et al, 2019;Lechmann et al, 2018;Şen, 2007). We also compiled geochemical data for ophiolite mafic members with 184-176 Ma (Sarifakioğlu et al, 2009;Topuz, Göçmengil, et al, 2013;Uysal, Ersoy, et al, 2015); these are presented in Table S2 (whole rocks) and Table S3 (Sr-Nd isotopes).…”

Formation and tectonic evolution of structural slices in eastern Kargı Massif

“…Yalçın (2018) identified that stratiform type Cu-Zn mineralization occurred in metamorphic rocks on Gökçedoğan (Kargı-Çorum) and explained the formation of the ore. Geological informations declared that the mineralization is metamorphosed VMS deposit and is complementary to the Besshi-type Cu-Zn deposits (Yalçın, 2018). Günay et al (2019) identified Zeybek VMS deposit in the Central Pontides near the study area. Detailed geological maps and supporting geochemical data will constantly be required, as the relevant VMS deposits in this province are recognized.…”

“…For this reason, more detailed mapping studies should be done and associated with these regions. In addition, there are Cyprus type and Besshi type massive sulphide mineralizations associated with mafic tholeiitic volcanism, metavolcaniclastics and metaclastics also there are arc-back arc geochemical signatures in the Central Pontides (Çakır, 1995;Altun et al, 2015;Çimen et al, 2016;Akbulut et al, 2016;Günay et al, 2018Günay et al, , 2019Yalçın, 2018).…”