Geochemical and Sr–Nd–Pb isotopic compositions of the Eocene Dölek and Sariçiçek Plutons, Eastern Turkey: Implications for magma interaction in the genesis of high-K calc-alkaline granitoids in a post-collision extensional setting

Karslı, Orhan; Chen, Bin; Aydin, Faruk; Şen, Cüneyt

doi:10.1016/j.lithos.2007.03.005

Cited by 202 publications

(83 citation statements)

References 79 publications

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“…Alternatively, they correspond to granitoids and their volcanic equivalents that result from pre-or post-collisional geodynamic events (Brown & D'Lemos 1991;Li & Li 2003;Kamei 2004;Karsli et al 2007). However, the intra-ophiolitic acid rocks of north Kozara show important differences with respect both to the plagiogranites and the pre-to post-collisional granites.…”

Section: The Origin Of Acid Magmatism: a Petrogenetic Link To The Basmentioning

confidence: 99%

The Upper Cretaceous ophiolite of North Kozara – remnants of an anomalous mid-ocean ridge segment of the Neotethys?

Cvetković¹,

Šarić²,

Grubić³

et al. 2014

Geologica Carpathica

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This study sheds new light on the origin and evolution of the north Kozara ophiolite, a part of the Sava-Vardar Zone. The Sava-Vardar Zone is regarded as a relict of the youngest Tethyan realm in the present-day Balkan Peninsula. The north Kozara ophiolite consists of a bimodal igneous association comprising isotropic to layered gabbros, diabase dykes and basaltic pillow lavas (basic suite), as well as relicts of predominantly rhyodacite lava flows and analogous shallow intrusions (acid suite). The rocks of the basic suite show relatively flat to moderately light-REE enriched patterns with no or weak negative Eu-anomaly, whereas those of the acid suite exhibit steeper patterns and have distinctively more pronounced Eu-and Sr-negative anomalies. Compared to the known intra-ophiolitic granitoids from the Eastern Vardar Zone, the acid suite rocks are most similar to those considered to be oceanic plagiogranites. The new geochemical data suggest that the basic suite rocks are similar to enriched mid-ocean ridge basalts. The geochemical characteristics of the acid suite rocks indicate that their primary magmas most probably originated via partial melting of gabbros from the lower oceanic crust. Our study confirms the oceanic nature of the north Kozara Mts rock assemblage, and suggests that it may have formed within an anomalous ridge setting similar to present-day Iceland.

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Section: The Origin Of Acid Magmatism: a Petrogenetic Link To The Basmentioning

confidence: 99%

The Upper Cretaceous ophiolite of North Kozara – remnants of an anomalous mid-ocean ridge segment of the Neotethys?

Cvetković¹,

Šarić²,

Grubić³

et al. 2014

Geologica Carpathica

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“…The geochemical trends defined by MME and their hosts are controlled by relative compositions of end-members and by bulk partition coefficients (e.g. Poli & Tommasini, 1991;Elburg, 1996;Karsli et al 2007). Compatible element contents in typical MME and hosts usually form continuous trends, but this is not the case for the Mt Cer ME and QMZD.…”

Section: A Qmzdmentioning

confidence: 99%

Petrogenetic and tectonic inferences from the study of the Mt Cer pluton (West Serbia)

et al. 2010

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-The Mt Cer Pluton, Serbia, is a complex laccolith-like intrusion (∼ 60 km 2 ), situated along the junction between the southern Pannonian Basin and northern Dinarides. It intrudes Palaeozoic metamorphic rocks causing weak to strong thermal effects. Based on modal and chemical compositions, four rock-types can be distinguished: (1) metaluminous I-type quartz monzonite/quartz monzodiorite (QMZD); (2) peraluminous S-type two-mica granite (TMG), which intrudes QMZD; (3) Stražanica granodiorite/quartz monzonite (GDS); and (4) isolated mafic enclaves (ME), found only in QMZD. 40 K-39 Ar dating and geological constraints indicate that the main quartz monzonite/quartz monzodiorite body of Mt Cer was emplaced not later than 21 Ma, whereas the emplacement ages of the Stražanica granodiorite/quartz monzonite and two-mica granites are estimated at around 18 and 16 Ma, respectively. The Mt Cer pluton is similar to the Mt Bukulja pluton, some 80 km southwestwards. Genesis of QMZD cannot be interpreted by fractional crystallization coupled with mixing or assimilation. It is best explained by a convection-diffusion process between mantle-derived minette/leucominette magmas and GDS-like magmas followed by two end-member magma mixing. The composition of GDS rocks suggests that GDS-like magmas could have formed by melting of lower crustal lithologies similar to amphibolite/metabasalts. The geochemistry of TMG is reproduced by an Assimilation/Fractional Crystallization model with a ratio of rate of assimilation to rate of fractional crystallization of 0.4, using the compositions of the least evolved TMG of the Bukulja pluton and adjacent metamorphic rocks as proxies for the parental magma and contaminant, respectively. The origin and evolution of the Mt Cer and adjacent Mt Bukulja plutons provide new constraints on the Tertiary geodynamics of the northern Dinarides-southern Pannonian region. The quartz monzonite/quartz monzodiorite is interpreted as a result of the Oligocene post-collisional Dinaride orogen-collapse, which included a limited lithosphere delamination, small-scale mantle upwelling, and melting of the lower crust. By contrast, the two-mica granite magmas formed through melting in shallower crustal levels during the extensional collapse in the Pannonian area.

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“…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).…”

Section: Introductionmentioning

confidence: 99%

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

Göçmengil¹,

Karacık²,

Genç³

et al. 2018

Turkish J Earth Sci

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The obliteration of the Neo-Tethyan Ocean and collision of the microplates along the northern part of Turkey led to the development of the İzmir-Ankara-Erzincan suture zone (IAESZ). After the collision of Pontides with the Central-Anatolian Crystalline Complex (CACC) in the Paleocene, a new phase of extension and volcanism concomitantly developed along the northern (Almus; Pontides) and southern (Yıldızeli; CACC) sides and along the IAESZ during the Middle Eocene time interval. The first products of the Middle Eocene volcanism in these areas are represented by calc-alkaline to alkaline (basic-intermediate) volcanic and volcanoclastic units together with late-stage trachytic dikes, plugs, and stocks. The mantle source area of both volcanic units displays a metasomatized character, which was dominantly fluxed by sediment-sourced melts. The partial melting of the metasomatized source area gave rise to first-stage basic-intermediate volcanism in the crustal levels. Simultaneously with the generation of the first-stage volcanism, basaltic trachyandesitic shallow-seated magma mushes were also developed. The reactivation of these shallow-seated mushes by latestage extensional tectonics gave rise to the development of trachytic volcanism in both regions, which have a high-K to shoshonitic character. Almus trachytic lavas are phenocryst-poor and have differentiated Mg# numbers (avg. 26). On the other hand, Yıldızeli trachytic lavas have a broad compositional range (benmoreite to latite); they are phenocryst-rich and show more basic character (Mg# avg. 40). Trachytic volcanism in both areas is largely controlled by fractional crystallization of similar basaltic trachyandesitic parental magma with minor assimilation of the upper crustal lithologies. 40 Ar-39 Ar ages from sanidine phenocrysts from both areas also confirm that trachytic volcanism in both regions developed nearly coevally in different tectonic blocks (~41-40 Ma). Generation of similar volcanism on the different tectonic blocks during the postcollisional stage was probably governed by a regional-scale delamination and/ or lithospheric removal-related tectonomagmatic processes.

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Geochemical and Sr–Nd–Pb isotopic compositions of the Eocene Dölek and Sariçiçek Plutons, Eastern Turkey: Implications for magma interaction in the genesis of high-K calc-alkaline granitoids in a post-collision extensional setting

Cited by 202 publications

References 79 publications

The Upper Cretaceous ophiolite of North Kozara – remnants of an anomalous mid-ocean ridge segment of the Neotethys?

The Upper Cretaceous ophiolite of North Kozara – remnants of an anomalous mid-ocean ridge segment of the Neotethys?

Petrogenetic and tectonic inferences from the study of the Mt Cer pluton (West Serbia)

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

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