Early–Middle Jurassic intra-oceanic subduction in the İzmir-Ankara-Erzincan Ocean, Northern Turkey

Çelik, Ömer Faruk; Marzoli, Andréa; Marschik, Robert; Chiaradia, Massimo; Neubauer, Franz; Öz, İlknur

doi:10.1016/j.tecto.2011.06.007

Cited by 129 publications

(45 citation statements)

References 53 publications

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“…5(7hb) 163.9 2.1(7hb) ± ± 167.9 2.8(7mu) 171.7 1.7(7hb) 170.8 3.2(7hb) 171.7 1.7(7hb) 165.1 2.7(7hb) ± ± ± ± ± 171 4(11hb) ± 171.8 1.2(7hb) ( ) ± 174.0 2.5 7hb ± 162.1 2.4(7hb) ± 157.2 11.6(7hb) ± 162.9 1.7(7hb) 181.6 1.6(7bi) 169.1 1.6(7mu) ± ± ± 117 1.5(8hb) 118.3 3.1(8hb) 109.6 2.4(8pl) 125 2(10hb) 116.6 3.3(10hb) ± ± ± ± ± 165.7 5.5 (7hb) ± 170. Flower, 2003 andÇelik et al, 2011).…”

Section: H E L L E N I D E Smentioning

confidence: 99%

The tauride ophiolites of Anatolia (Turkey): A review

Parlak¹

2016

J. Earth Sci.

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The Tauride ophiolites lie on the northern and southern flanks of an E-W-trending Tauride carbonate platform. They mainly consist of three tectonic units namely in ascending order, ophiolitic mélange, sub-ophiolitic metamorphic sole and oceanic lithospheric remnants. They were generated above intra-oceanic subduction zones and emplaced over the Tauride carbonate platform from different Neotethyan oceanic basins in the Late Cretaceous. Tauride ophiolites from west to east are described and reviewed. All are underlain by well-preserved dynamothermal metamorphic soles of varied structural thicknesses up to 500 m that have a constant structural position between ophiolitic mélange below and harzburgitic mantle tectonites above and display typical inverted metamorphic sequences from amphibolite facies above to greenschist facies below. The metamorphic soles are shown to have evolved during the initiation of subduction and emplacement processes. In the Pozantı-Karsantı area the contact between the metamorphic sole and the overlying serpentinized harzburgites is characterized by a 1.5-2-m-thick zone of sheared serpentinized harzburgitic mantle intercalated with amphibolites and cut by thick mafic dykes (7-8 m) which postdate intraoceanic metamorphism and high-temperature ductile deformation. This contact is interpreted as an intra-oceanic decoupling surface along which volcanics from the upper levels of the down-going plate were metamorphosed to amphibolite facies and accreted to the base of the hanging wall plate. The metamorphic soles and overlying ophiolitic rocks were intruded by numerous isolated post-metamorphic diabase dykes filled by island arc tholeiitic magma. Subduction initiation and roll-back processes best explain the structural and petrological relationships of Late Cretaceous ophiolite genesis, metamorphic sole formation and subsequent dyke emplacement of the Tauride ophiolites. KEY WORDS: ophiolite, metamorphic sole, dyke emplacement, roll-back, subduction initiation. INTRODUCTIONThe Tauride orogenic belts of Turkey are interpreted as representing a continental fragment that rifted from Gondwana (North Africa) during the Triassic, followed by reamalgamation and continental collision during the OligoMiocene (Karaoğlan et al., 2016) or Miocene (Okay et al., 2010). The Taurides are traditionally divided into three contiguous parts; the western, central and eastern Taurides (Özgül, 1976).Ophiolites along the Tauride belt start with the Lycian nappes to the west and end with the Divriği ophiolite to the east (Fig. 1). These ophiolites (the Lycian nappes, Antalya, Beyşehir-Hoyran nappes, Mersin, Alihoca, Pozantı-Karsantı, Pınarbaşı and Divriği) are situated either on the northern or on the southern flank of an approximately E-W trending Tauride carbonate platform axis (Juteau, 1980 (Juteau, 1980). The plutonic sections and the metamorphic soles of the Tauride ophiolites are cut by numerous isolated microgabbro-diabase and minor pyroxenite dykes at different structural levels (Robertson et al

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Section: H E L L E N I D E Smentioning

confidence: 99%

The tauride ophiolites of Anatolia (Turkey): A review

Parlak¹

2016

J. Earth Sci.

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“…The main copper mineralization representing middle-deep sections of the porphyry systems are not clearly seen in the fi eld. In Eastern Pontides from Early Jurassic onwards İzmir-Ankara-Erzincan ocean started closing subduction related (Çelik et al, 2011;Topuz et al, 2012;Robertson et al, 2013). Collision between Taurus platform and Eurasia active continental margin took place in Early Eocene.…”

Section: Discussionmentioning

confidence: 99%

“…The base metals and precious metals of the Eastern Pontides have for a long time drawn the attention of earth scientists (a) Geological evolution of the İzmir-Ankara-Erzincan suture zone in particular and it's continuation to the East Minor Caucasus are especially important (Okay, 1984;Evans and Hall, 1990;Okay and Şahintürk, 1997;Yılmaz et al, 1997;Okay and Tüysüz, 1999;Yılmaz et al, 2000;Hakyemez and Konak, 2001;Topuz et al, 2004;Okay et al, 2006;Rice et al, 2006;Konak and Hakyemez, 2008a;Rice et al, 2009;Rolland et al, 2009a, b;Çelik et al, 2011;Ustaömer and Robertson, 2010;Topuz et al, 2012;Ustaömer et al, 2012;Robertson et al, 2013), (b) Origin of Late Cretaceous massive sulphide deposits (Kraeff, 1963;Hirst and Eğin, 1979;Çağatay and Boyle, 1980;Akıncı, 1984), (c) Late CretaceousEocene porphyry Cu deposits, (Çağatay and Çağatay, 1978;Aral and Erler, 1981;Er et al, 1995;Soylu, 1999;Singer et al, 2008;Yiğit, 2006Yiğit, , 2009Oğuz, (d) Ophiolites and their emplacements along İzmir-AnkaraErzincan suture zone (Rice et al, 2006(Rice et al, , 2009Özen et al, 2008;Çolakoğlu et al, 2009Çolakoğlu et al, , Sarıfakıoğlu et al, 2009Parlak et al, 2013;…”

Section: Introductionmentioning

confidence: 99%

Alteration Zones Associated With Eocene Magmatism in the Olur (Erzurum) 9 Area, Eastern Pontides and Their Significance

Önal

Akyildiz

Cengiz³

et al. 2017

Bulletin of the Mineral Research and Exploration

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The Alpine Orogenic Belt with numerous porphyry Cu-Mo-Au mineralizations, starts from Eastern Europe continues through Turkey and the Caucasus and extends into Iran and Afghanistan. The study area of the Eastern Pontides is in this orogenic belt. Using fi eld and laboratory studies an attempt has been made to establish the origin of Yeşilbağlar, Kaban and Köprübaşı alteration zones in the Olur area (Erzurum). In the study area Early Eocene Coşkunlar volcanics and sub volcanic rocks have contact with the Oltu çayı volcanics of Early-Middle Jurassic. Alteration in the study area effects these Oltuçayı and Kaban volcanics. In the study area mineralizations are present in the alteration zones. Disseminated, stockwork, vein/veinlet and fi ssure type mineralizations are present in the Coşkunlar dacite. Paragenesis in the alteration zones are pyrite, chalcopyrite, sphalerite, galena, pyrrohotite, quartz, calcite and barite. FT-IR and XRD studies showed the presence of clay, sulphate, sulphur, carbonate, silicate and oxide minerals in the alteration zones. Field and petrographical studies showed that alteration types in the Yeşilbağlar, Kaban and Köprübaşı areas are, advanced argillicargillic, pyropylitic and sericitic. They are similar to the alterations present in the upper part of the mineralizations in the porphyry systems of the Alpine Orogenic Belt. In the Eastern Pontides starting in Early Jurassic, continuation of subductions resulted in closure of the İzmir-Ankara-Erzincan ocean and in Early Eocene the Taurid platform collided with the Eurasian active continental margin. Data from the study area indicate the presence of alteration zones in the upper part of the buried porphyry system and the possibility of mineralized parts in the deeper parts of the system.

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“…This study evaluates the actual geological data and reinterprets former ones (Norman 1972(Norman , 1973(Norman , 1985Batman 1978Batman , 1981Çapan et al 1983;Akyürek et al 1984Akyürek et al , 1996Hakyemez et al 1986;Koçyiğit 1987Koçyiğit , 1991Tankut 1990;Dilek & Thy 2006;Çelik et al 2011Rojay 2013;Sarıfakıoğlu et al 2014) obtained from the Ankara Mélange and proposes a new synthetic model.…”

Section: Introductionmentioning

confidence: 92%