Andean-type active margin formation in the eastern Taurides: Geochemical and geochronogical evidence from the Baskil granitoid (Elazığ, SE Turkey)

Rızaoğlu, Tamer; Parlak, Osman; Höck, Volker; Koller, Friedrich; Hames, Willis E.; Billor, Zeki

doi:10.1016/j.tecto.2008.08.011

Cited by 68 publications

(47 citation statements)

References 28 publications

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“…In contrast to the north of Bitlis-Pütürge metamorphic massif, the SE Anatolian ophiolites, including the Göksun, Doğanşehir, İspendere and Kömürhan ophiolites, were tectonically emplaced beneath the Tauride platform and cut by granitoids Cretaceous to Eocene granitoids (Parlak, 2006;Rizaoğlu et al, 2009;Karaoğ-lan, Parlak, Robertson, et al, 2013). The ophiolites in two belts exhibit a complete ophiolite pseudostratigraphy and are geochemically of suprasubduction zone (SSZ) type.…”

Section: Discussionmentioning

confidence: 99%

“…The Southeast Anatolian ophiolites are interpreted to have been generated between the Tauride platform and the Bitlis-Pütürge continent. These ophiolites (a) are represented by magmatically evolved plutonic and extrusive rocks, (b) SSZ-type crust has evolved into ensimatic island arc assemblage during 83-75 Ma Rizaoğlu et al, 2006;Robertson et al, 2007), (c) Upper Cretaceous pelagic carbonates are seen as commonly interbedded with the lavas (Robertson et al, 2007), (d) most of the ophiolites and the Malatya-Keban platforms were intruded by either Late Cretaceous or Eocene granitoid rocks (Karaoğlan, Parlak, Robertson, et al, 2013;Parlak, 2006;Rizaoğlu et al, 2009), (e) the ophiolites are tectonically overlain by the Tauride platform and in turn tectonically overlie the Middle Eocene Maden Group, suggesting late Cretaceous and post-Middle Eocene tectonic emplacement, (f) U-Pb zircon dating of gabbroic rocks from the İspendere and Kömürhan ophiolites has yielded ages from 84 to 88 Ma and (g) The Bitlis-Pütürge continental fragment was subducted and experienced high-to low-pressure metamorphism at 70-74 Ma and exhumed (Karaoğlan, 2012;Oberhänsli et al, 2010;Rolland et al, 2012; as a passive-margin, (h) Continues subduction gave rise to the formation of an ensimatic island arc (Helete) where the HT/HP metamorphism formed at its root (Berit metaophiolite) and followed by underthrusting beneath the Tauride active margin and Eocene granitoid (Doğanşehir) intrusion (Karaoğlan, Parlak, Robertson, et al, 2013). (i) Subduction rollback caused the rapid exhumation of the Berit metaophiolite and opening of a back-arc basin (Maden), relatively close to the Tauride active margin (Karaoğlan, Parlak, Robertson, et al, 2013;Rolland et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

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U–Pb and Sm–Nd geochronology of the ophiolites from the SE Turkey: implications for the Neotethyan evolution

Karaoğlan¹,

Parlak²,

Klötzli³

et al. 2012

Geodinamica Acta

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The ophiolites in southeast Turkey crop out along two distinct belts. The ophiolites in the north are attached to Tauride active margin and represented by Göksun, Berit, İspendere, Kömürhan and Guleman ophiolites. Whereas the ophiolites in the south are observed as tectonically overlying the Arabian continental margin and characterized mainly by Kızıldağ (Hatay) and Koçali ophiolites. In this paper, new U-Pb and Sm-Nd isotopic ages are presented. The zircons extracted from the gabbroic cumulates of the Kömürhan ophiolite yielded a concordia age of 87.2 ± 3.1 Ma. The zircons in the gabbroic cumulates of the İspendere ophiolite yielded a Concordia age of 84.5 ± 3.9 Ma. Moreover, the Sm-Nd age of the gabbroic cumulates of the İspendere ophiolite yielded 85.1 ± 7.1 Ma (εNd = + 7.8). The gabbroic rocks of the Kızıl-dağ (Hatay) ophiolite yielded 110 ± 11 Ma (εNd = + 7.3) Sm-Nd isochron age. The new and already published U-Pb and Sm-Nd ages from the Kızıldağ ophiolite suggest that the time span between the melt generation in a subduction zone setting and SSZ-type oceanic crust crystallization was ≥3 my. All the ages from the Southeast Anatolian ophiolites suggest that the ophiolites between the Bitlis-Pütürge continent and the Arabian platform formed around 99-102 Ma whereas the ophiolites between the Bitlis-Pütürge continent and the Tauride platform formed around 84-90 Ma, suggesting that the peri-Arabic belt ophiolites are 10 My older than the ophiolite attached to the Malatya-Keban platform in the north. Detailed comparison suggests that there are number of differences between the ophiolites to the north and south of the Bitlis-Pütürge continental unit based on the geological, geochronological, petrological, internal stratigraphy of the ophiolites as well as their relationships with the continental fragments during the late Cretaceous. Therefore, the ophiolites were rooted from two different oceanic basins, one to the north and other to the south of the Bitlis-Pütürge continent.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

U–Pb and Sm–Nd geochronology of the ophiolites from the SE Turkey: implications for the Neotethyan evolution

Karaoğlan¹,

Parlak²,

Klötzli³

et al. 2012

Geodinamica Acta

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“…The ophiolites of this belt are genetically linked with the Troodos ophiolite Dilek & Delaloye 1992;Dilek & Eddy 1992a;Dilek & Thy 1998) and the Baer-Bassit ophiolite Al-Riyami et al 2002a;Morris et al 2002) ophiolites. In contrast, to the north of Bitlis-Pütürge metamorphic massif the SE Anatolian ophiolites, including the Göksun, Doganşehir, İspendere, Kömürhan and Guleman ophiolites, were tectonically emplaced beneath the Tauride platform and cut by I-type calc-alkaline volcanic arc granitoid rocks (Parlak 2006;Rızaoglu et al 2009), mainly during the Late Cretaceous (Fig. 2).…”

mentioning

confidence: 99%

“…2). These are: (1) metamorphic massifs; (2) ophiolites; (3) meta-ophiolites; (4) volcanic arc units; (5)granitoids(Asutay1988;Yazgan&Chessex1991; Akgül 1993; Ö nal 1995; Robertson et al 2004Robertson et al , 2006Robertson et al , 2007Parlak 2006;Rızaoglu et al 2009); and (6) volcanic-sedimentary units (Erdogan 1975;Aktaş & Robertson 1984Yigitbaş 1989;Yigitbaş & Yılmaz 1996;Robertson et al 2007). The metamorphic massifs are characterized by the MalatyaKeban platform in the north and the Bitlis-Pütürge metamorphics further south in a structurally lower position in the thrust belt of SE Anatolia (Ketin 1983;Yazgan & Chessex 1991;Yılmaz 1993;Yılmaz et al 1993;Fig.…”

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confidence: 99%

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Petrology of the İspendere (Malatya) ophiolite from the Southeast Anatolia: implications for the Late Mesozoic evolution of the southern Neotethyan Ocean

Parlak

Karaoğlan

Rızaoğlu

et al. 2012

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The İspendere ophiolite forms part of the Tauride active continental margin assemblage in SE Anatolia. The ophiolite exhibits an intact oceanic lithosphere section and is intruded by Late Cretaceous calc-alkaline granites. The ophiolite comprises mantle tectonites, ultramafic to mafic cumulates, isotropic gabbros, isolated diabase dykes, a sheeted dyke complex, plagiogranite and volcanic rocks. The volcanics and the sheeted dyke complex exhibit (1) similar rare earth element patterns, with flat to light rare earth element depletion (La-Yb) N ¼ 0.71-1.14 and 0.65-1.22, (2) negative Nb anomalies and (3) flat-lying high field strength element trends. These features differ from a typical Normal-Mid Ocean Ridge Basalt fractionation trend and could have resulted from c. 15% partial melting of a previously depleted mantle source. The whole-rock chemistry and the mineral chemistry of the ultramafic to mafic cumulates [high Ca plagioclases (An 89 -81 ), magnesian olivines (Fo 88 -81 ) and clinopyroxenes (Mg# 90 -83 )] show that the primary magma of the plutonic suite is compositionally similar to modern island arc tholeiites. The available evidence suggests that the İspendere ophiolite formed at a northerly supra-subduction zone spreading centre of the Southern Neotethys, between the Taurides and the Bitlis-Pütürge metamorphic units, during the Late Cretaceous. Comparison with the adjacent Göksun, Kömürhan and Guleman ophiolites suggests that the İspendere ophiolite represents part of a single regional-scale sheet of oceanic lithosphere that was accreted to the base of Tauride active continental margin where it was cut by arc-type magmatic rocks.

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Neotectonic Deformation in Central Eurasia: A Geodynamic Model Approach

et al. 2017

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Central Eurasia hosts wide orogenic belts of collision between India and Arabia with Eurasia, with diffuse or localized deformation occurring up to hundreds of kilometers from the primary plate boundaries. Although numerous studies have investigated the neotectonic deformation in central Eurasia, most of them have focused on limited segments of the orogenic systems. Here we explore the neotectonic deformation of all of central Eurasia, including both collision zones and the links between them. We use a thin‐spherical sheet approach in which lithosphere strength is calculated from lithosphere structure and its thermal regime. We investigate the contributions of variations in lithospheric structure, rheology, boundary conditions, and fault friction coefficients on the predicted velocity and stress fields. Results (deformation pattern, surface velocities, tectonic stresses, and slip rates on faults) are constrained by independent observations of tectonic regime, GPS, and stress data. Our model predictions reproduce the counterclockwise rotation of Arabia and Iran, the westward escape of Anatolia, and the eastward extrusion of the northern Tibetan Plateau. To simulate the observed extensional faults in the Tibetan Plateau, a weaker lithosphere is required, provided by a change in the rheological parameters. The southward movement of the SE Tibetan Plateau can be explained by the combined effects of the Sumatra trench retreat, a thinner lithospheric mantle, and strik‐slip faults in the region. This study offers a comprehensive model for regions with little or no data coverage, like the Arabia‐India intercollision zone, where the surface velocity is northward showing no deflection related to Arabia and India indentations.

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Andean-type active margin formation in the eastern Taurides: Geochemical and geochronogical evidence from the Baskil granitoid (Elazığ, SE Turkey)

Cited by 68 publications

References 28 publications

U–Pb and Sm–Nd geochronology of the ophiolites from the SE Turkey: implications for the Neotethyan evolution

U–Pb and Sm–Nd geochronology of the ophiolites from the SE Turkey: implications for the Neotethyan evolution

Petrology of the İspendere (Malatya) ophiolite from the Southeast Anatolia: implications for the Late Mesozoic evolution of the southern Neotethyan Ocean

Neotectonic Deformation in Central Eurasia: A Geodynamic Model Approach

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