Kinematic reconstructions and magmatic evolution illuminating crustal and mantle dynamics of the eastern Mediterranean region since the late Cretaceous

Menant, Armel; Jolivet, Laurent; Vrielynck, Bruno

doi:10.1016/j.tecto.2016.03.007

Cited by 117 publications

(113 citation statements)

References 285 publications

Supporting

Mentioning

107

Contrasting

Unclassified

Order By: Relevance

“…10) whereby exhumation of units previously underthrusted below oceanic lithosphere occurred in an overriding plate position above an active subduction zone. Similar to the Aegean region, southward and westward younging accretion was followed by southward and westward younging exhumation (e.g., Menant et al, 2016 and references therein), which may be well envisioned by the 'caterpillar walk' exhumation style illustrated by Tirel et al (2013).…”

Section: The Late Cretaceous-early Eocene Central Anatolian Extensionmentioning

confidence: 95%

“…All these elements are structurally overlain by isolated klippen of ophiolites and their underlying ophiolitic mélange ( Fig. 1; Menant et al, 2016;van Hinsbergen et al, 2016). These ophiolites are interpreted to have formed above a second, intraoceanic subduction zone within the Neotethys located south of the Pontide subduction zone.…”

Section: Central Anatolian Geologymentioning

confidence: 99%

See 1 more Smart Citation

A long-lived Late Cretaceous–early Eocene extensional province in Anatolia? Structural evidence from the Ivriz Detachment, southern central Turkey

Gürer

Plunder

Kirst

et al. 2018

Earth and Planetary Science Letters

View full text Add to dashboard Cite

Central Anatolia exposes previously buried and metamorphosed, continent-derived rocks -the Kır¸sehir and Afyon zones -now covering an area of ∼300 × 400 km. So far, the exhumation history of these rocks has been poorly constrained. We show for the first time that the major, >120 km long, top-NE 'Ivriz' Detachment controlled the exhumation of the HP/LT metamorphic Afyon Zone in southern Central Anatolia. We date its activity at between the latest Cretaceous and early Eocene times. Combined with previously documented isolated extensional detachments found in the Kır¸sehir Block, our results suggest that a major province governed by extensional exhumation was active throughout Central Anatolia between ∼80 and ∼48 Ma. Although similar in dimension to the Aegean extensional province to the east, the Central Anatolian extensional province is considerably older and was controlled by a different extension direction. From this, we infer that the African slab(s) that subducted below Anatolia must have rolled back relative to the Aegean slab since at least the latest Cretaceous, suggesting that these regions were underlain by a segmented slab. Whether or not these early segments already corresponded to the modern Aegean, Antalya, and Cyprus slab segments remains open for debate, but slab segmentation must have occurred much earlier than previously thought.

show abstract

Section: The Late Cretaceous-early Eocene Central Anatolian Extensionmentioning

confidence: 95%

Section: Central Anatolian Geologymentioning

confidence: 99%

A long-lived Late Cretaceous–early Eocene extensional province in Anatolia? Structural evidence from the Ivriz Detachment, southern central Turkey

Gürer

Plunder

Kirst

et al. 2018

Earth and Planetary Science Letters

View full text Add to dashboard Cite

show abstract

“…The Kırşehir Block and Tavşanlı zone in the north may have been separated from the Afyon zone, which formed the promontory of the Tauride continental platform, by another, few hundred kilometer‐wide oceanic basin conceptually known as the Intra‐Tauride ocean. The Upper Cretaceous ophiolites overlying the Taurides are frequently inferred to derive from this Intra‐Tauride ocean basin [e.g., Robertson et al , ; Parlak et al , ; Barrier and Vrielynck , ; Menant et al , ]. However, a recent plate kinematic reconstruction [ van Hinsbergen et al , ] suggested that derivation of ophiolites from an Intra‐Tauride basin is plate kinematically unlikely and not required to explain the orogenic structure.…”

Section: Geological Settingmentioning

confidence: 99%

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

et al. 2017

View full text Add to dashboard Cite

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.

show abstract

“…Reconstructions of Africa and the Tethys Ocean from the Late Jurassic to the Present. Plate kinematics is based upon Barrier and Vrielynck (2008), Jolivet et al (2003), and Menant et al (2016). Thick grey lines represent the motion paths of three points of Africa across the reconstructions.…”

Section: Tectonic History Of Africa and The Neo-tethys Oceanmentioning

confidence: 99%

Neo-Tethys geodynamics and mantle convection: from extension to compression in Africa and a conceptual model for obduction

et al. 2016

Self Cite

View full text Add to dashboard Cite

Since the Mesozoic, Africa has been under extension with shorter periods of compression associated with obduction of ophiolites on its northern margin. Less frequent than “normal” subduction, obduction is a first order process that remains enigmatic. The closure of the Neo-Tethys Ocean, by the Upper Cretaceous, is characterized by a major obduction event, from the Mediterranean region to the Himalayas, best represented around the Arabian Plate, from Cyprus to Oman. These ophiolites were all emplaced in a short time window in the Late Cretaceous, from ∼100 to 75 Ma, on the northern margin of Africa, in a context of compression over large parts of Africa and Europe, across the convergence zone. The scale of this process requires an explanation at the scale of several thousands of kilometres along strike, thus probably involving a large part of the convecting mantle. We suggest that alternating extension and compression in Africa could be explained by switching convection regimes. The extensional situation would correspond to steady-state whole-mantle convection, Africa being carried northward by a large-scale conveyor belt, while compression and obduction would occur when the African slab penetrates the upper–lower mantle transition zone and the African plate accelerates due to increasing plume activity, until full penetration of the Tethys slab in the lower mantle across the 660 km transition zone during a 25 Myr long period. The long-term geological archives on which such scenarios are founded can provide independent time constraints for testing numerical models of mantle convection and slab–plume interactions.

show abstract

Kinematic reconstructions and magmatic evolution illuminating crustal and mantle dynamics of the eastern Mediterranean region since the late Cretaceous

Abstract: To cite this version:Armel Menant, Laurent Jolivet, Bruno Vrielynck. Kinematic reconstructions and magmatic evolution illuminating crustal and mantle dynamics of the eastern Mediterranean region since the late Cretaceous. Tectonophysics, Elsevier, 2016, 675, pp

Cited by 117 publications

References 285 publications

A long-lived Late Cretaceous–early Eocene extensional province in Anatolia? Structural evidence from the Ivriz Detachment, southern central Turkey

A long-lived Late Cretaceous–early Eocene extensional province in Anatolia? Structural evidence from the Ivriz Detachment, southern central Turkey

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

Neo-Tethys geodynamics and mantle convection: from extension to compression in Africa and a conceptual model for obduction

Contact Info

Product

Resources

About