Structure and geochemistry of an Alaskan-type ultramafic–mafic complex in the Eastern Pontides, NE Turkey

Eyüboğlu, Yener; Dilek, Yıldırım; Bozkurt, Erdi̇n; Bektaş, Osman; Rojay, Bora; Şen, Cüneyt

doi:10.1016/j.gr.2010.01.008

Cited by 96 publications

(74 citation statements)

References 53 publications

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“…Although several magmatic complexes from this belt have been widely studied in the recent years (e.g., Topuz et al, 2005;Arslan and Aslan, 2006;Karslı et al, 2010;Dilek et al, 2010, 2011a, 2011b, 2013a2014), the origin and geodynamic setting of the late Mesozoic-Cenozoic magmatism remain controversial due to lack of systematical geological, geochemical and chronological data (Eyuboglu et al, 2011a). The general consensus is that the late Mesozoic-Cenozoic igneous activity is related to nothward subduction of an oceanic lithosphere (Paleotethys or…”

Section: The Eastern Pontides Orogenic Belt Represents One Of the Besmentioning

confidence: 99%

“…Tauride and Pontide blocks in the early Cenozoic (e.g., Şengör and Yılmaz, 1981;Okay and Şahintürk, 1997;Topuz et al, 2005;Arslan and Aslan, 2006;Karslı et al, 2010;Dilek et al, 2010). However, most recent geological, geochemical and chronological studies on the tectonomagmatic evolution of the Eastern Pontides Orogenic Belt do not support this model.…”

Section: Northern Branch Of Neotethys) In the Late Mesozoic And Follomentioning

confidence: 99%

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Cenozoic forearc gabbros from the northern zone of the Eastern Pontides Orogenic Belt, NE Turkey: Implications for slab window magmatism and convergent margin tectonics

et al. 2016

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Section: The Eastern Pontides Orogenic Belt Represents One Of the Besmentioning

confidence: 99%

Section: Northern Branch Of Neotethys) In the Late Mesozoic And Follomentioning

confidence: 99%

Cenozoic forearc gabbros from the northern zone of the Eastern Pontides Orogenic Belt, NE Turkey: Implications for slab window magmatism and convergent margin tectonics

et al. 2016

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“…1). The temporal distribution of the magmatism in this region shows different phases of magma generation with distinct geochemical signatures mainly in the late Eocene, late Miocene and Plio-Quaternary Eyuboglu et al, 2010Eyuboglu et al, , 2011aEyuboglu et al, ,b,c,d,e, 2012Eyuboglu et al, , 2013a. Mantle-derived volcanic rocks with oceanic-island basalt (OIB)-like geochemical features with and/or without subduction fingerprints are commonly found in the Turkish-Iranian High Plateau (e.g., Aldanmaz et al, 2006;Dilek and Altunkaynak, 2009;Kheirkhah et al, 2009;Elitok et al, 2010;Allen et al, 2013).…”

Section: Introductionmentioning

confidence: 95%

“…An earlier interpretation by Sengor and Yılmaz (1981) proposed that Paleotethys was located to the north of the magmatic arc, and hence southward subduction operated from the Paleozoic until the Dogger, and that northward subduction occurred subsequently from the late Mesozoic until the Eocene. The third model includes those of Dewey et al (1973), Bektaş et al (1999), Chorowicz et al (1998), Eyuboglu et al (2006Eyuboglu et al ( , 2007Eyuboglu et al ( , 2010 and Eyuboglu (2010) who favor a southward subduction of the Tethys oceanic lithosphere, which was situated to the north of magmatic arc, continued uninterruptedly from the Paleozoic till the late Cenozoic.…”

Section: Introductionmentioning

confidence: 99%

Late Miocene K-rich volcanism in the Eslamieh Peninsula (Saray), NW Iran: Implications for geodynamic evolution of the Turkish–Iranian High Plateau

et al. 2014

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a b s t r a c tKeywords: High-K lavas Geochemistry, Sr-Nd-Pb isotopes, Post-collisional magmatism Iran Post-collisional volcanism in northwestern Iran is represented by the Saray high-K rocks including leucite-bearing under-saturated and leucite-free silica saturated rocks. We report Ar-Ar age data which constrain the age as ca. 11Ma (late Miocene). Most of clinopyroxene phenocrysts from the volcanic rocks have complex oscillatory zoning, with high Ti and Al cores, low Ti and high Al mantled clinopyroxenes, grading into low Ti and Al outer rims. All the rocks are highly enriched in incompatible trace elements and have identical Sr-Nd-Pb isotopes. Enrichment in incompatible elements and other geochemical features for the Saray lavas suggest a metasomatized sub-continental lithospheric mantle (SCLM) as the magma source. The negative Nb- Ta Pb isotopic values of the Saray lavas imply the involvement of slab terrigenous sediments and/or a continental lithosphere. Isotopically, the volcanic rocks define a binary trend, representing 5-8% mixing between the primary mantle and sediment melts. Our melting models suggest residual garnet in the source and are incompatible with partial melting of amphibole and/or phlogopite bearing lherzolites, although the complex geochemical features might indicate the result of mixing between melts produced by different sources or a homogenous melt passing through a compositionally-zoned mantle during multiple stages of partial melting and melt migration. The geochronological, geochemical and isotopic data for the Saray rocks suggest that these Late Miocene magmas were derived from a small degree of partial melting of subduction-metasomatized (subcontinental) lithospheric mantle source in a post-collisional setting.

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“…The eastern Pontides orogenic belt is one of the best examples of long-term active continental margins in the world, where Tethys oceanic lithosphere is subducted beneath the Pontide continental lithosphere (e.g., Dewey et al, 1973;Bektaş et al, 1999;Eyuboglu et al, 2007Eyuboglu et al, , 2010Eyuboglu et al, , 2011aEyuboglu et al, , 2012. According to Defant and Drummond (1990) the adakitic rocks in modern arc settings are produced by partial melting of a young (<25 Ma) and hot, subducting oceanic slab.…”

Section: Geodynamic and Petrogenetic Implicationsmentioning

confidence: 99%

The nature of transition from adakitic to non-adakitic magmatism in a slab window setting: A synthesis from the eastern Pontides, NE Turkey

Eyüboğlu

Santosh

Dudás

et al. 2013

Geoscience Frontiers

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a b s t r a c tThe eastern Pontides orogenic belt provides a window into continental arc magmatism in the AlpineeHimalayan belt. The late MesozoiceCenozoic geodynamic evolution of this belt remains controversial. Here we focus on the nature of the transition from the adakitic to non-adakitic magmatism in the Kale area of Gumushane region in NE Turkey where this transition is best preserved. The adakitic lithologies comprise porphyries and hyaloclastites. The porphyries are represented by biotite-rich andesites, hornblende-rich andesite and dacite. The hayaloclastites represent the final stage of adakitic activity and they were generated by eruption/intrusion of adakitic andesitic magma into soft carbonate mud. The non-adakitic lithologies include basaltic-andesitic volcanic and associated pyroclastic rocks. Both rock groups are cutting by basaltic dikes representing the final stage of the Cenozoic magmatism in the study area. We report zircon U-Pb ages of 48.71 AE 0.74 Ma for the adakitic rocks, and 44.68 AE 0.84 Ma for the non-adakitic type, suggesting that there is no significant time gap during the transition from adakitic to non-adakitic magmatism. We evaluate the origin, magma processes and tectonic setting of the magmatism in the southern part of the eastern Pontides orogenic belt. Our results have important bearing on the late MesozoiceCenozoic geodynamic evolution of the eastern Mediterranean region.

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Structure and geochemistry of an Alaskan-type ultramafic–mafic complex in the Eastern Pontides, NE Turkey

Cited by 96 publications

References 53 publications

Cenozoic forearc gabbros from the northern zone of the Eastern Pontides Orogenic Belt, NE Turkey: Implications for slab window magmatism and convergent margin tectonics

Cenozoic forearc gabbros from the northern zone of the Eastern Pontides Orogenic Belt, NE Turkey: Implications for slab window magmatism and convergent margin tectonics

Late Miocene K-rich volcanism in the Eslamieh Peninsula (Saray), NW Iran: Implications for geodynamic evolution of the Turkish–Iranian High Plateau

The nature of transition from adakitic to non-adakitic magmatism in a slab window setting: A synthesis from the eastern Pontides, NE Turkey

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