Post-collisional adakitic volcanism in the eastern part of the Sakarya Zone, Turkey: evidence for slab and crustal melting

Dokuz, Abdurrahman; Uysal, İbrahi̇m; Siebel, Wolfgang; Turan, Mehmet Tan; Duncan, Robert A.; Akçay, Miğraç

doi:10.1007/s00410-013-0936-8

Cited by 65 publications

(38 citation statements)

References 128 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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

View full text Add to dashboard Cite

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.

show abstract

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

View full text Add to dashboard Cite

show abstract

“…However, rare volcanic and plutonic bodies, such as those in this study, attained high-K to shoshonitic composition Asan, Kurt, Francis, & Morgan, 2014;Bektas & Gedik, 1988;Eyüboğlu, 2010;Genç et al, 2014;Gülmez & Genc, 2015;Karsli et al, 2012;Varol, 2013). According to a widely accepted tectonic model (Aydınçakır, 2014;Dokuz et al, 2013;Karsli, Uysal, Dilek, Aydin, & Kandemir, 2013;Okay & Tüysüz, 1999;Şengör & Yılmaz, 1981;Ustaomer & Robertson, 2010), the Late Cretaceous magmatism is associated with the northward subduction of the northern branch of the Neotethys Ocean beneath the southern margin of the Eurasian Plate during the late Cretaceous to Paleocene (Figure 1(a)). The subduction polarity and geotectonic evolution of the eastern Pontides are controversial during the Cretaceous.…”

Section: Introductionmentioning

confidence: 62%

Subduction-related Late Cretaceous high-K volcanism in the Central Pontides orogenic belt: constraints on geodynamic implications

Aydınçakır

2016

Geodinamica Acta

View full text Add to dashboard Cite

Mineral chemistry, major and trace elements, 40 Ar/ 39 Ar age and Sr-Nd-Pb isotopic data are presented for the Late Cretaceous Hamsilos volcanic rocks in the Central Pontides, Turkey. The Hamsilos volcanic rocks mainly consist of basalt, andesite and associated pyroclastics (volcanic breccia, vitric tuff and crystal tuff). They display shoshonitic and high-K calc-alkaline affinities. The shoshonitic rocks contain plagioclase, clinopyroxene, alkali feldspar, phlogopite, analcime, sanidine, olivine, apatite and titanomagnetite, whereas the high-K calc-alkaline rocks contain plagioclase, clinopyroxene, orthopyroxene, magnetite / titanomagnetite in microgranular porphyritic, hyalo-microlitic porphyritic and glomeroporphyritic matrix. Mineral chemistry data reveal that the pressure condition of the clinopyroxene crystallisation for the shoshonitic rocks are between 1.4 and 6.3 kbar corresponds to 6-18-km depth and the high-K calc-alkaline rocks are between 5 and 12 km. 40 Ar/ 39 Ar age data changing between 72 ± .5 Ma and 79.0 ± .3 Ma (Campanian) were determined for the Late Cretaceous Hamsilos volcanic rocks, contemporaneous with the subduction of the Neo-Tethyan Ocean beneath the Pontides. The studied volcanic rocks were enriched in the large-ion lithophile and light rare earth element contents, with pronounced depletion in the contents of high-field-strength elements. Chondrite-normalised rare earth element patterns (La N /Lu N = 6-17) show low to medium enrichment, indicating similar sources of the rock suite. Pb/ 204 Pb values between 37.839 and 38.427. The main solidification processes involved in the evolution of the volcanic rocks consist of fractional crystallisation, with minor amounts of crustal contamination ± magma mixing. According to geochemical evidence, the shoshonitic melts in the Hamsilos volcanic rocks were possibly derived from the low degree of partial melting of a subcontinental lithospheric mantle (SCLM), while the high-K calc-alkaline melts were derived from relatively high degree of partial melting of SCLM that was enriched by fluids and/or sediments from a subduction of oceanic crust.

show abstract

“…In comparison with the extrusive and intrusive equivalents from the eastern part of the Sakarya zone, it is clear that the Sr-Nd composition of the MSIs is more radiogenic than those of the Upper Cretaceous calc-alkaline granitic intrusions (e.g. Kaygusuz et al 2008;Karsli et al 2010a) and the Lower Eocene adakitic rocks (Topuz et al 2005;Karsli et al 2010bKarsli et al , 2011Eyüboğlu et al 2011;Dokuz et al 2013) (Figure 6). …”

Section: Sr-nd Isotopesmentioning

confidence: 97%

“…Although a few researchers have different interpretations of the subduction polarity of the Tethys oceanic lithosphere during the late Mesozoic (e.g. Bektaş et al 1999;Eyüboğlu et al 2014), a large majority have concluded that the Late Cretaceous magmatism, which led to the formation of the EBMA, was related to the northward subduction of the northern branch of the Neotethyan oceanic plate beneath the Eurasian plate during the Late Cretaceous-Palaeocene (Figure 1a; Sengör and Yilmaz 1981;Manetti et al 1983;Yılmaz and Boztuğ 1996;Okay and Şahintürk 1998;Okay and Tüysüz 1999;Boztuğ et al 2007;Dilek et al 2010;Karsli et al 2010a;Dokuz et al 2013). Geologic and palaeomagnetic data from the Sakarya zone also support the above interpretation, and indicate that the EBMA was 1248 F. Aydin close to the European margin during the late Mesozoic period (Channell et al 1996;Yılmaz et al 1997;Okay and Tüysüz 1999;Çinku et al 2010;Ustaömer and Robertson 2010).…”

Section: Geological Settingmentioning

confidence: 98%

Geochronology, geochemistry, and petrogenesis of the Maçka subvolcanic intrusions: implications for the Late Cretaceous magmatic and geodynamic evolution of the eastern part of the Sakarya Zone, northeastern Turkey

Aydin

2014

International Geology Review

View full text Add to dashboard Cite

Post-collisional adakitic volcanism in the eastern part of the Sakarya Zone, Turkey: evidence for slab and crustal melting

Cited by 65 publications

References 128 publications

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

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

Subduction-related Late Cretaceous high-K volcanism in the Central Pontides orogenic belt: constraints on geodynamic implications

Geochronology, geochemistry, and petrogenesis of the Maçka subvolcanic intrusions: implications for the Late Cretaceous magmatic and geodynamic evolution of the eastern part of the Sakarya Zone, northeastern Turkey

Contact Info

Product

Resources

About