Diachronous demise of the Neotethys Ocean as a driver for non-cylindrical orogenesis in Anatolia

Gürer, Derya; Hinsbergen, Douwe J.J. van

doi:10.1016/j.tecto.2018.06.005

Cited by 30 publications

(45 citation statements)

References 121 publications

(184 reference statements)

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“…In contrast, eastern Anatolia has been governed by collision of Arabia with the Anatolian and Eurasian blocks (Allen et al, ; McQuarrie & van Hinsbergen, ). During the Paleocene, the area was still associated with widespread Neotethyan oceanic lithosphere subduction beneath and within the modern Anatolian orogen (Gürer & van Hinsbergen, ), which terminated with collision at the Bitlis suture at ~18–11 Ma (Hüsing et al, ; Okay et al, ), generating the eastern Anatolian high plateau (Figure ; Dewey et al, ; Şengör et al, ; Şengör & Kidd, ). Magmatic activity and crustal thickening were induced by strong N‐S compression since the early Miocene (Dewey et al, ), but eastern Anatolian volcanism was particularly extensive after collision (11.4 Ma to present).…”

Section: Geodynamic and Magmatic Settingmentioning

confidence: 99%

Mantle Sources of Recent Anatolian Intraplate Magmatism: A Regional Plume or Local Tectonic Origin?

et al. 2018

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We present an extensive study of rehomogenized olivine‐hosted melt inclusions, olivine phenocrysts, and chromian spinel inclusions to explore the link between geodynamic conditions and the origin and composition of Pliocene–Quaternary intraplate magmatism in Anatolia at Kula, Ceyhan‐Osmaniye, and Karacadağ. Exceptional compositional variability of these products reveals early and incomplete mixing of distinct parental melts in each volcanic center, reflecting asthenospheric and lithospheric mantle sources. The studied primitive magmas consist of (1) two variably enriched ocean island basalt (OIB)‐type melts in Kula; (2) both OIB‐type and plume mid‐ocean ridge basalt (P‐MORB)‐like melts beneath Toprakkale and Üçtepeler (Ceyhan‐Osmaniye); and (3) two variably enriched OIB‐type melts beneath Karacadağ. Estimated conditions of primary melt generation are 23–9 kbar, 75–30 km, and 1415–1215 °C for Kula; 28–19 kbar, 90–65 km, and 1430–1350 °C for Toprakkale; 23–18 kbar, 75–60 km, and 1400–1355 °C for Üçtepeler; and 35–27 kbar, 115–90 km, and 1530–1455 °C for Karacadağ, the deepest levels of which correspond to the depth of the lithosphere‐asthenosphere boundary in all regions. Although magma ascent was likely facilitated by local deformation structures, recent Anatolian intraplate magmatism seems to be triggered by large‐scale mantle flow that also affects the wider Arabian and North African regions. We infer that these volcanics form part of a much wider Arabian‐North African intraplate volcanic province, which was able to invade the Anatolian upper plate through slab gaps.

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Section: Geodynamic and Magmatic Settingmentioning

confidence: 99%

Mantle Sources of Recent Anatolian Intraplate Magmatism: A Regional Plume or Local Tectonic Origin?

et al. 2018

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“…We first reconstruct up to 300 km of convergence between the western end of the Geyikdağı nappe and the Aladağ nappe and 90 km between the eastern end of the Geyikdağı nappe and the Aladağ nappe. As well as Africa‐Eurasia convergence, this includes an additional 100–130 km of convergence between Africa and Central Anatolia reconstructed by Gürer and van Hinsbergen (). Previous kinematic reconstructions of western Anatolia (van Hinsbergen et al, ) suggested that the Beydağları platform accreted to the upper plate at ~35 Ma (van Hinsbergen et al, ; van Hinsbergen & Schmid, ).…”

Section: Discussionmentioning

confidence: 99%

“…This diachronous accretion predicts a CW rotation that fits well with the paleomagnetic data (Figure b) and is kinematically feasible given stratigraphic and paleomagnetic constraints. After accretion of Beydağları to the upper plate at 35 Ma, the Taurides are restored as part of Central Anatolia (Gürer & van Hinsbergen, ). Finally, the Taurides are affected by Miocene rotations as documented by Koç et al ().…”

Section: Discussionmentioning

confidence: 99%

“…We used paleomagnetic and stratigraphic constraints on deformation and the modern dimensions of structural units to build a kinematic restoration of the Central Taurides using GPlates software. As a basis for our reconstruction, we used the restoration of Greece and western Turkey of van Hinsbergen and Schmid (), the restoration of central and eastern Turkey of Gürer and van Hinsbergen (), of McPhee (), and Maffione et al () and then we incorporated the restoration of Miocene oroclinal bending of the Central Taurides of Koç et al (). Our reconstruction is incorporated into the global plate circuit of Seton et al () with the updated Miocene Atlantic reconstruction of DeMets et al ().…”

Section: Methodsmentioning

confidence: 99%

“…Despite this first‐order simplicity, the modern distribution of tectonic units and metamorphic belts that formed by progressive accretion to the south of the IASZ varies strongly along‐strike (see van Hinsbergen et al, for a comprehensive review; Figure ). This may be a result of the original shape of the Greater Adriatic margin, and the shape of the Cretaceous subduction zone that was made up of ~N‐S and ~E‐W segments roughly following the Adriatic passive margin (van Hinsbergen et al, ; Lefebvre et al, ; Maffione et al, ; Gürer & van Hinsbergen, ). According to these reconstructions, the area in Central Anatolia investigated in this study formed adjacent to an ~N‐S trending subduction zone.…”

Section: Geological Settingmentioning

confidence: 99%

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Palinspastic Reconstruction Versus Cross‐Section Balancing: How Complete Is the Central Taurides Fold‐Thrust Belt (Turkey)?

et al. 2018

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In many fold‐thrust belts, cross section–derived shortening estimates are significantly lower than predicted based on plate convergence. This has led to controversial hypotheses that shortening may be largely underestimated due to wholesale underthrusting (convergence without shortening) below far‐traveled continent or ocean‐derived nappes. The Late Cretaceous‐Eocene Taurides fold‐thrust belt (southern Turkey) may contain a highly incomplete shortening record of convergence likely caused by wholesale underthrusting. To estimate this underthrusting, we calculate convergence across the belt using a map‐view palinspastic reconstruction that takes into account major rotations of tectonic units during their accretion. We use paleomagnetic and fault kinematic analysis, timing of accretion, and Africa‐Eurasia convergence to constrain our reconstruction. Our paleomagnetic results confirm an ~40° clockwise vertical axis rotation of the Geyikdağı nappe that forms the core of the belt, which we interpret is accommodated by a lateral gradient in underthrusting on faults structurally above and below the Geyikdağı nappe. We reconstruct ~400–450 km of convergence across the Taurides during their accretion. We compare this predicted convergence to shortening calculated from balanced cross sections, in which we reconstruct a minimum of 154‐km shortening: 57 km within far‐traveled nappes, 70‐km thrusting of far‐traveled nappes over the Geyikdağı nappe, and 27‐km shortening within the Geyikdağı nappe. Shortening in the Taurides created a significant nappe stack, but the majority of convergence was accommodated by wholesale underthrusting with barely a trace at the surface, including ~160 km of convergence by rotation of the belt, and 90–130 km related to missing Africa‐Eurasia convergence.

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Towards interactive global paleogeographic maps, new reconstructions at 60, 40 and 20 Ma

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Dupont‐Nivet

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et al. 2021

Earth-Science Reviews

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Diachronous demise of the Neotethys Ocean as a driver for non-cylindrical orogenesis in Anatolia

Cited by 30 publications

References 121 publications

Mantle Sources of Recent Anatolian Intraplate Magmatism: A Regional Plume or Local Tectonic Origin?

Mantle Sources of Recent Anatolian Intraplate Magmatism: A Regional Plume or Local Tectonic Origin?

Palinspastic Reconstruction Versus Cross‐Section Balancing: How Complete Is the Central Taurides Fold‐Thrust Belt (Turkey)?

Towards interactive global paleogeographic maps, new reconstructions at 60, 40 and 20 Ma

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Diachronous demise of the Neotethys Ocean as a driver for non-cylindrical orogenesis in Anatolia

Cited by 30 publications

References 121 publications

Mantle Sources of Recent Anatolian Intraplate Magmatism: A Regional Plume or Local Tectonic Origin?

Mantle Sources of Recent Anatolian Intraplate Magmatism: A Regional Plume or Local Tectonic Origin?

Palinspastic Reconstruction Versus Cross‐Section Balancing: How Complete Is the Central Taurides Fold‐Thrust Belt (Turkey)?

Towards interactive global paleogeographic maps, new reconstructions at 60, 40 and 20 Ma

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Product

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Towards interactive global paleogeographic maps, new reconstructions at 60, 40 and 20 Ma