Radiolarian biochronology of upper Anisian to upper Ladinian (Middle Triassic) blocks and tectonic slices of volcano-sedimentary successions in the Mersin Mélange, southern Turkey: New insights for the evolution of Neotethys

Tekin, U. Kagan; Bedi, Yavuz; Okuyucu, Cengız; Göncüoğlu, M. Cemal; Sayıt, Kaan

doi:10.1016/j.jafrearsci.2016.09.039

Cited by 24 publications

(18 citation statements)

References 29 publications

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“…Moix et al, ) in an olistostromal matrix. By this evidence, Tekin, Bedi, Okuyucu, Göncüoglu, and Sayit (), Tekin, Bedi, Okuyucu, Göncüoglu, Sayit et al () and Sayit et al () ascribed the formation to a sedimentary mélange. The present relationship between the larger blocks and the matrix, on the other hand, appears to be sheared.…”

Section: Geological Frameworkmentioning

confidence: 80%

“…Another and the most recent one, which includes Anisian chert, came from the Mersin Mélange (southern Turkey; Tekin, Bedi, Okuyucu, Göncüoglu, & Sayit, 2016). Although both localities are situated in southern Turkey, they are shown to be of northerly origin (Collins & Robertson, ; Parlak & Robertson, ; Tekin, Bedi, Okuyucu, Göncüoglu, & Sayit, ). The finding from the Mersin Mélange was a significant one, since the Anisian age extracted from the pelagic sediments became the oldest age acquired from the IAE Ocean until now.…”

Section: Discussionmentioning

confidence: 99%

“…The Mersin Mélange was further subdivided into two units; Middle–Late Triassic Hacialani Mélange and Late Cretaceous Sorgun Ophiolitic Mélange (Moix et al, ). Recent studies by Tekin, Bedi, Okuyucu, Göncüoglu, and Sayit () and Tekin, Bedi, Okuyucu, Göncüoglu, Sayit et al (), however, showed that no such distinction occurs within the Mersin Mélange, and they regarded the mélange as a single mass‐flow entity of Late Cretaceous age.…”

Section: Geological Frameworkmentioning

confidence: 99%

“…Previously, some researchers (e.g. Forel et al, in press; H. W. Kozur, Moix, & Ozsvart, , , , ; Moix et al, , ; Ozsvart, Dumitrica, Hungerbühler, & Moix, ; Ozsvart, Dumitrica, & Moix, ; Ozsvart, Moix, & Kozur, ; Tekin, Bedi, Okuyucu, Göncüoglu, & Sayit, ; Tekin, Bedi, Okuyucu, Göncüoglu, Sayit et al, ) have carried out detailed paleontological studies on blocks/tectonic slices in the Mersin Mélange to clarify the radiolarian, foraminiferal and ostracod assemblages. Among these studies, Moix et al () investigated the limestone and chert blocks within the Mersin Mélange and report a chert‐detrital limestone association (‘Karinkali Block’) near the Karincali‐Southwest section in this study (Figure ).…”

Section: Geological Frameworkmentioning

confidence: 99%

“…The Mersin Ophiolitic Complex (Moix et al, ; Moix, Kozur, Stampfli, & Mostler, ; Pampal, ; Parlak & Robertson, ) comprises two units; the Mersin Mélange (MM) and the Mersin Ophiolite with its sub‐ophiolitic metamorphic sole in southern Turkey (Figure b). According to Tekin, Bedi, Okuyucu, Göncüoglu, and Sayit (), Tekin, Bedi, Okuyucu, Göncüoglu, and Sayit et al (), and Sayit, Bedi, Tekin, Göncüoglu, and Okuyucu (), the Mersin Mélange is of sedimentary origin and contains mainly remnants of the Beysehir–Hoyran nappes sensu Brunn et al (, ) that originated from the IAE Ocean of the Neotethys (equals ‘Bozkir Unit’ by Özgül, , , ). Previously detailed studies performed on the Mersin Mélange revealed that it includes blocks/tectonic slices of Early Carboniferous to early Late Cretaceous ages (Moix et al, , ; Tekin, Bedi, Okuyucu, Göncüoglu, Sayit, et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Integrated Radiolaria, benthic foraminifera and conodont biochronology of the pelagic Permian blocks/tectonic slices and geochemistry of associated volcanic rocks from the Mersin Mélange, southern Turkey: Implications for the Permian evolution of the northern Neotethys

et al. 2018

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Blocks and tectonic slices within the Mersin Mélange (southern Turkey), which are of Northern Neotethyan origin (Izmir–Ankara–Erzincan Ocean (IAE)), were studied in detail by using radiolarian, conodont, and foraminiferal assemblages on six different stratigraphic sections with well‐preserved Permian succesions. The basal part of the Permian sequence, composed of alternating chert and mudstone with basic volcanics, is assigned to the late Asselian (Early Permian) based on radiolarians. The next basaltic interval in the sequence is dated as Kungurian. The highly alkaline basic volcanics in the sequence are extremely enriched, similar to kimberlitic/lamprophyric magmas generated at continental intraplate settings. Trace element systematics suggest that these lavas were generated in a continental margin involving a metasomatized subcontinental lithospheric mantle source (SCLM). The middle part of the Permian sequences, dated by benthic foraminifera and conodont assemblages, includes detrital limestones with chert interlayers and neptunian dykes of middle Wordian to earliest Wuchiapingian age. Higher in the sequence, detrital limestones are overlain by alternating chert and mudstone with intermittent microbrecciated beds of early Wuchiapingian to middle Changhsingian (Late Permian) age based on the radiolarians. A large negative shift at the base of the Lopingian at the upper part of section is correlated to negative shifts at the Guadalupian/Lopingian boundary associated with the end‐Guadalupian mass extinction event. All these findings indicate that a continental rift system associated with a possible mantle plume existed during the late Early to Late Permian period. This event was responsible for the rupturing of the northern Gondwanan margin related to the opening of the IAE Ocean. When the deep basinal features of the Early Permian volcano‐sedimentary sequence are considered, the proto IAE oceanic crust formed possibly before the end of the Permian. This, in turn, suggests that the opening of the IAE Ocean dates back to as early as the Permian.

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Section: Geological Frameworkmentioning

confidence: 80%

Section: Discussionmentioning

confidence: 99%

Section: Geological Frameworkmentioning

confidence: 99%

Section: Geological Frameworkmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Integrated Radiolaria, benthic foraminifera and conodont biochronology of the pelagic Permian blocks/tectonic slices and geochemistry of associated volcanic rocks from the Mersin Mélange, southern Turkey: Implications for the Permian evolution of the northern Neotethys

et al. 2018

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Kinematics of Late Cretaceous subduction initiation in the Neo‐Tethys Ocean reconstructed from ophiolites of Turkey, Cyprus, and Syria

et al. 2017

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Formation of new subduction zones represents one of the cornerstones of plate tectonics, yet both the kinematics and geodynamics governing this process remain enigmatic. A major subduction initiation event occurred in the Late Cretaceous, within the Neo‐Tethys Ocean between Gondwana and Eurasia. Suprasubduction zone ophiolites (i.e., emerged fragments of ancient oceanic lithosphere formed at suprasubduction spreading centers) were generated during this subduction event and are today distributed in the eastern Mediterranean region along three ~E‐W trending ophiolitic belts. Several models have been proposed to explain the formation of these ophiolites and the evolution of the associated intra‐Neo‐Tethyan subduction zone. Here we present new paleospreading directions from six Upper Cretaceous ophiolites of Turkey, Cyprus, and Syria, calculated by using new and published paleomagnetic data from sheeted dyke complexes. Our results show that ~NNE‐SSW subduction zones were formed within the Neo‐Tethys during the Late Cretaceous, which we propose were part of a major step‐shaped subduction system composed of ~NNE‐SSW and ~WNW‐ESE segments. We infer that this subduction system developed within old (Triassic?) lithosphere, along fracture zones and perpendicular weakness zones, since the Neo‐Tethyan spreading ridge formed during Gondwana fragmentation would have already been subducted at the Pontides subduction zone by the Late Cretaceous. Our new results provide an alternative kinematic model of Cretaceous Neo‐Tethyan subduction initiation and call for future research on the mechanisms of subduction inception within old (and cold) lithosphere and the formation of metamorphic soles below suprasubduction zone ophiolites in the absence of nearby spreading ridges.

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New radiolarian data from the Jurassic ophiolitic mélange of Avala Mountain (Serbia, Belgrade Region)

et al. 2018

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Radiolarian biochronology of upper Anisian to upper Ladinian (Middle Triassic) blocks and tectonic slices of volcano-sedimentary successions in the Mersin Mélange, southern Turkey: New insights for the evolution of Neotethys

Cited by 24 publications

References 29 publications

Integrated Radiolaria, benthic foraminifera and conodont biochronology of the pelagic Permian blocks/tectonic slices and geochemistry of associated volcanic rocks from the Mersin Mélange, southern Turkey: Implications for the Permian evolution of the northern Neotethys

Integrated Radiolaria, benthic foraminifera and conodont biochronology of the pelagic Permian blocks/tectonic slices and geochemistry of associated volcanic rocks from the Mersin Mélange, southern Turkey: Implications for the Permian evolution of the northern Neotethys

Kinematics of Late Cretaceous subduction initiation in the Neo‐Tethys Ocean reconstructed from ophiolites of Turkey, Cyprus, and Syria

New radiolarian data from the Jurassic ophiolitic mélange of Avala Mountain (Serbia, Belgrade Region)

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