Apatite fission-track data for the Miocene Arabia-Eurasia collision

Okay, Aral I.; Zattin, Massımılıano; Cavazza, William

doi:10.1130/g30234.1

Cited by 322 publications

(204 citation statements)

References 31 publications

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“…Based on the study of deformation and uplift during the collision between the two tectonic plates, Allen and Armstrong (2008) suggest a late Eocene age for the closure of the eastern Tethys seaway. However, on the basis of the stratigraphic record in the Zagros Basin, Okay et al (2010) deduce that the collision between Afro-Arabia and Eurasia occurred in the early Miocene, approximately 19 Ma. This estimated age for the closure the Tethys seaway is consistent with the first evidence of mammal exchanges between the two continents, the so-called Gomphotherium landbridge (Rögl, 1999;.…”

Section: N Hamon Et Al: Tethys Seaway Closure and Middle Miocene CLmentioning

confidence: 99%

The role of eastern Tethys seaway closure in the Middle Miocene Climatic Transition (ca. 14 Ma)

et al. 2013

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Abstract. The Middle Miocene Climatic Transition (MMCT, approximately 14 Ma) is a key period in Cenozoic cooling and cryospheric expansion. Despite being well documented in isotopic record, the causes of the MMCT are still a matter of debate. Among various hypotheses, some authors suggested that it was due the final closure of the eastern Tethys seaway and subsequent oceanic circulation reorganisation. The aim of the present study is to quantify the impact of varying Tethys seaway depths on middle Miocene ocean and climate, in order to better understand its role in the MMCT.We present four sensitivity experiments with a fully coupled ocean-atmosphere general circulation model. Our results indicate the presence of a warm and salty water source in the northern Indian Ocean when the eastern Tethys is deep open (4000 or 1000 m), which corresponds to the Tethyan Indian Saline Water (TISW) described on the basis of isotopic studies. This water source is absent in the experiments with shallow (250 m) and closed Tethys seaway, inducing strong changes in the latitudinal density gradient and ultimately the reinforcement of the Antarctic Circumpolar Current (ACC). Moreover, when the Tethys seaway is shallow or closed, there is a westward water flow in the Gibraltar Strait that strengthens the Atlantic Meridional Overturning Circulation (AMOC) compared to the experiments with deep-open Tethys seaway. Our results therefore suggest that the shoaling and final closure of the eastern Tethys seaway played a major role in the oceanic circulation reorganisation during the middle Miocene.The results presented here provide new constraints on the timing of the Tethys seaway closure and particularly indicate that, prior to 14 Ma, a deep-open Tethys seaway should have allowed the formation of TISW. Moreover, whereas the final closure of this seaway likely played a major role in the reorganisation of oceanic circulation, we suggest that it was not the main driver of the global cooling and Antarctica ice-sheet expansion during the MMCT. Here we propose that the initiation of the MMCT was caused by an atmospheric pCO 2 drawdown and that the oceanic changes due to the Tethys seaway closure amplified the response of global climate and East Antarctic Ice Sheet.

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Section: N Hamon Et Al: Tethys Seaway Closure and Middle Miocene CLmentioning

confidence: 99%

The role of eastern Tethys seaway closure in the Middle Miocene Climatic Transition (ca. 14 Ma)

et al. 2013

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“…Compressional front in the northern Tauride margin then migrated southward up to the Bey Dağları platform and its foreland basin, overthrusted by the non-metamorphosed Lycian nappes in the Miocene [de Graciansky, 1967;Poisson, 1977;Gutnic et al, 1979;Collins and Robertson, 1998;van Hinsbergen et al, 2010a]. Further east, the late Cretaceous-early Cenozoic subduction of the Mesogean oceanic lithosphere below the southern Tauride margin was followed by the Oligocene-early Miocene continental subduction/collision of the Arabian plate allowing for the building of the Bitlis belt (figure 5) Hempton, 1987;Jolivet and Faccenna, 2000;Agard et al, 2005;Allen and Armstrong, 2008;Barrier and Vrielynck, 2008;Okay et al, 2010b;McQuarrie and van Hinsbergen, 2013].…”

Section: The Anatolide-tauride Blockmentioning

confidence: 99%

“…Although its timing is debated, the continental subduction and subsequent collision of Arabia with the Eurasian margin seem to have occurred in the Oligocene-early Miocene, resulting in the building of the Bitlis-Zagros belt [Hempton, 1987;Jolivet and Faccenna, 2000;Agard et al, 2005;Allen and Armstrong, 2008;Okay et al, 2010b;McQuarrie and van Hinsbergen, 2013]. Such lithospheric-scale processes could also have induced major tectonic changes within the AnatolideTauride block.…”

Section: Eurasia-arabia Collisionmentioning

confidence: 99%

“…In the middle-late Miocene, the ongoing collision of Arabia with Eurasia along the Bitlis belt (figures 8r-w) is associated with the uplift of eastern Anatolia [Dewey et al, 1986;Şengör et al, 2003;Okay et al, 2010b] and the development of a wide magmatic province [Pearce et al, 1990;Keskin, 2003Keskin, , 2007. About 12 Ma ago, the whole Anatolide-Tauride block started to move westward, mostly accommodated by the dextral strike-slip NAF that propagated throughout the Pontides and reached the Dardanelle Strait 6-5 Ma ago (figures 8t-w) [Armijo et al, 1999;Şengör et al, 2005;Melinte-Dobrinescu et al, 2009].…”

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confidence: 99%

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

2016

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“…This suggests that distributed deformation took place within a ~30 km-wide zone, above the NNAF fault extremity prior to its propagation all the way to the surface. The nature and offset of the deformed structures, their relation with the NAF and the timing of the onset of the fault in the Dardanelles have been questioned by various studies [Yaltırak et al, 2000;Okay et al, 2000 andLe Pichon et al, 2001;Rangin et al, 2004;Zattin et al, 2005Okay et al, 2010. We address these questions with new observations and age constraints for the Dardanelles fold system.…”

Section: Geological Settingmentioning

confidence: 87%

Crustal Strain in the Marmara Pull‐Apart Region Associated With the Propagation Process of the North Anatolian Fault

et al. 2018

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Key Points:• Structural map and geological cross-section of the Ganos-Gelibolu fold system in the Dardanelles region.• Timing, amount of shortening associated to the propagation of the North Anatolian Fault deduced from mapping and critical revision of the stratigraphy.• Reconstruction of the westward propagation of the NAF in the Dardanelles region. AbstractPropagation processes of plate-scale faults through continental lithosphere are poorly documented. The North Anatolian fault (NAF) is a continental right-lateral transform with striking evidence for propagation processes in the Marmara Sea pull-apart region. Earlier work [Armijo et al., 1999] suggests that in the Dardanelles, where the principal, northern branch of that fault (NNAF) enters into the Aegean: (1) a fold-thrust system has progressively developed above the NNAF fault tip, at the WSW corner of the Marmara Sea pull-apart. The main anticline formed there was sheared and its SW half laterally offset by ~70 km to the SW; (2) the timing of structure development appears correlated with sea-level changes associated with the Messinian Salinity Crisis (MSC). Our new description of the Dardanelles (or Ganos-Gelibolu) fold-thrust system is based on structural mapping, field observations and calcareous nannoplankton analyses to date key sedimentary units. Our results provide tight constraints on the main pulse of folding associated with propagation of the tip of the NNAF: it took place in the late Miocene to earliest Pliocene (5.60 to 5.04 Ma), before deposition of undeformed Pliocene marine sediments. The folding is mostly coeval with the MSC and accommodated several kilometers of shortening at the fault tip. After full propagation of the NNAF up to the surface, the folded structure was sheared and right-laterally offset, with an average 14 mm/yr of slip-rate during the past ~5 Myrs. A reconstruction of tectonic evolution suggests a flower structure nucleating and taking root at the tip of the fault.

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Apatite fission-track data for the Miocene Arabia-Eurasia collision

Cited by 322 publications

References 31 publications

The role of eastern Tethys seaway closure in the Middle Miocene Climatic Transition (ca. 14 Ma)

The role of eastern Tethys seaway closure in the Middle Miocene Climatic Transition (ca. 14 Ma)

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

Crustal Strain in the Marmara Pull‐Apart Region Associated With the Propagation Process of the North Anatolian Fault

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