First evidence of Late Carnian radiolarians from the Izmir–Ankara suture complex, central Sakarya, Turkey: implications for the opening age of the Izmir–Ankara branch of Neo-Tethys

Tekin, U. Kagan; Göncüoğlu, M. Cemal; Turhan, Necati

doi:10.1016/s0016-6995(02)00015-3

Cited by 104 publications

(55 citation statements)

References 8 publications

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“…Geochemistry of volcanic rocks within the mélange indicates the presence of different magma types such as ocean island basalts (OIB), mid-ocean ridge basalts (MORB) and island arc basalts (IAB) (Parlak and Robertson, 2004;Andrew and Robertson, 2002;Robertson, 1998, 1997). Radiolarian cherts within the mélange units have yielded Late Triassic, Jurassic, Early Cretaceous and Late Cretaceous ages (Göncüoğlu et al, 2006;Parlak and Robertson, 2004;Tekin et al, 2002;Bragin and Tekin, 1996). The ophiolitic mélanges formed as oceanic accretionary complexes ahead of an advancing suprasubduction oceanic slab during the Late Cretaceous.…”

Section: Discussionmentioning

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: Discussionmentioning

confidence: 99%

The tauride ophiolites of Anatolia (Turkey): A review

Parlak¹

2016

J. Earth Sci.

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“…Tekin and Göncüoğlu (2007) and Tekin and Göncüoğlu (2008); (4) Tekin and Göncüoğlu (2009); (5) ; (6) Göncüoğlu et al (2000); (7) Göncüoğlu et al (2006b); (8) Yalınız et al (in prep. ) in Göncüoğlu et al (2006b); (9) Göncüoğlu et al (2006a), Göncüoğlu et al (2010) and Tekin et al (2002); (10) Servais (1982); (11) Bragin and Tekin (1996); (12) Rojay et al (2004); (13) Çelik (2010) and Üner (2010) in Tekin, Çelik et al (2012); (14) Tüysüz and Tekin (2007); (15) Boccaletti et al (1966); (16) Bozkurt et al (1997). The map is modified after Moix et al (2008).…”

Section: Age and Type Of Blocksmentioning

confidence: 94%

“…These integrated researches are definitely of high importance, as they allow presenting a clearer picture of the evolution of this marginal Neotethyan basin (e.g. Göncüoğlu et al, 2000Göncüoğlu et al, , 2006bGöncüoğlu, Sayıt, & Tekin, 2010;Göncüoğlu, Turhan, & Tekin, 2003;Okay & Altıner, 2007;Okay et al, 2012;Tekin & Göncüoğlu, 2007, 2009Tekin et al, 2002.…”

Section: Geodynamic Evolutionmentioning

confidence: 99%

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Jurassic and Cretaceous radiolarian assemblages from the Bornova mélange in northern Karaburun Peninsula (western Turkey) and its connection to the İzmir–Ankara mélanges

Moix¹,

Goričan

2013

Geodinamica Acta

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“…In the eastern Mediterranean, the latter are stratigraphically associated with pelagic and/or carbonate-platform limestones dated to the Upper Triassic [Marcoux, 1970;Dumont et al, 1972;Robertson and Waldron, 1990]. The Carnian age of the opening of the Izmir-Ankara branch of the Neotethys according to radiolarian faunas [Tekin et al, 2002] sets the problem of the geodynamic setting of the Late Triassic submarine volcanism in the eastern Mediterranean, which might be rift-related, ridge-related or finally oceanic island-type as recently shown for the Mamonia Complex in Cyprus [Lapierre et al, 2007]. In this paper, we present a new set of petrologic and geochemical data on the Antalya nappes (southwestern Turkey) submarine volcanic rocks.…”

Section: Introductionmentioning

confidence: 99%

The alkaline intraplate volcanism of the Antalya nappes (Turkey): a Late Triassic remnant of the Neotethys

Maury

Lapierre

Bosch

et al. 2008

Bulletin De La Société Géologique De France

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Abstract. -Late Triassic submarine alkali basalts and hawaiites were collected from two superimposed tectonic slices belonging to the Kara Dere -Sayrun unit of the Middle Antalya nappes, southwestern Turkey. New determinations on conodont faunas allow to date this sequence to the Lower Carnian (Julian). The volcanic rocks show rather homogeneous compositions, with high TiO 2 and relatively low MgO and Ni contents which suggest olivine fractionation. Their primitive mantle-normalised multi-elements plots show Nb and Ta enrichments relative to La, Pb negative anomalies and heavy rare earth element and Y depletions typical of intraplate ocean island basalts. These characteristics are consistent with the major and trace element compositions of their primary clinopyroxene phenocrysts, which do not show any feature ascribable to crustal contamination. The studied lavas display a restricted range of εNd (+4.6 to +5.2) which falls within the range of ocean island basalts. Their initial ( 143 Nd/ 144 Nd)i ratios are too low to be explained by a simple mixing line between depleted MORB mantle (DMM) and HIMU components. Their Pb and Nd isotopic compositions plot along a mixing line between HIMU component and an enriched mantle, the composition of which could be the result of the addition of about 5 to 8% of an EM2 component (recycled marine sediments) to DMM. The lack of evidence for any continental crustal component in their genesis could be consistent with their emplacement in an intra-oceanic setting.

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First evidence of Late Carnian radiolarians from the Izmir–Ankara suture complex, central Sakarya, Turkey: implications for the opening age of the Izmir–Ankara branch of Neo-Tethys

Cited by 104 publications

References 8 publications

The tauride ophiolites of Anatolia (Turkey): A review

The tauride ophiolites of Anatolia (Turkey): A review

Jurassic and Cretaceous radiolarian assemblages from the Bornova mélange in northern Karaburun Peninsula (western Turkey) and its connection to the İzmir–Ankara mélanges

The alkaline intraplate volcanism of the Antalya nappes (Turkey): a Late Triassic remnant of the Neotethys

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