Two-stage development of the Late Cretaceous to Late Eocene Darende Basin: implications for closure of Neotethys in central eastern Anatolia (Turkey)

Booth, Matthew G.; Robertson, Alastair H. F.; Taşlı, Kemal; İnan, Nurdan; Ünlügenç, Ulvi Can; Vincent, Stephen J.

doi:10.1144/sp372.8

Cited by 16 publications

(13 citation statements)

References 62 publications

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“…north margin of Kırdağ Ophiolite; Figure 18) by oceanic units within the suture zone, which is attributed to post-collision suture zone tightening. Areas further south in the Taurides were also affected by Late Eocene compressional deformation (see Booth et al, 2013).…”

Section: Palaeocene: Remnant Oceanic Basin or Developing Collisionmentioning

confidence: 99%

Subduction, ophiolite genesis and collision history of Tethys adjacent to the Eurasian continental margin: new evidence from the Eastern Pontides, Turkey

et al. 2013

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This paper presents several types of new information including U-Pb radiometric dating of ophiolitic rocks and an intrusive granite, micropalaeontological dating of siliceous and calcareous sedimentary rocks, together with sedimentological, petrographic and structural data. The new information is synthesised with existing results from the study area and adjacent regions (Central Pontides and Lesser Caucasus) to produce a new tectonic model for the MesozoicCenozoic tectonic development of this key Tethyan suture zone.The Tethyan suture zone in NE Turkey (Ankara-Erzincan-Kars suture zone) exemplifies stages in the subduction, suturing and post-collisional deformation of a Mesozoic ocean basin that existed between the Eurasian (Pontide) and Gondwanan (Tauride) continents. Ophiolitic rocks, both as intact and as dismembered sequences, together with an intrusive granite (tonalite), formed during the Early Jurassic in a supra-subduction zone (SSZ) setting within the İzmir-Ankara-Erzincan ocean. Basalts also occur as blocks and dismembered thrust sheets within Cretaceous accretionary melange. During the Early Jurassic, these basalts erupted in both a SSZ-type setting and in an intra-plate (seamount-type) setting. The volcanic-sedimentary melange accreted in an open-ocean setting in response to Cretaceous northward subduction beneath a backstop made up of Early Jurassic forearc ophiolitic crust. The Early Jurassic SSZ basalts in the melange were later detached from the overriding Early Jurassic ophiolitic crust.Sedimentary melange (debris-flow deposits) locally includes ophiolitic extrusive rocks of boninitic composition that were metamorphosed under high-pressure low-temperature conditions. Slices of mainly Cretaceous clastic sedimentary rocks within the suture zone are interpreted as a deformed forearc basin that bordered the Eurasian active margin. The basin received a copious supply of sediments derived from Late Cretaceous arc volcanism together with input of ophiolitic detritus from accreted oceanic crust.Accretionary melange was emplaced southwards onto the leading edge of the Tauride continent (Munzur Massif) during latest Cretaceous time. Accretionary melange was also emplaced northwards over the collapsed southern edge of the Eurasian continental margin (continental backstop) during the latest Cretaceous. Sedimentation persisted into the Early Eocene in more northerly areas of the Eurasian margin.Collision of the Tauride and Eurasian continents took place progressively during latest Late Palaeocene-Early Eocene. The Jurassic SSZ ophiolites and the Cretaceous accretionary melange finally docked with the Eurasian margin. Coarse clastic sediments were shed from the uplifted Eurasian margin and infilled a narrow peripheral basin. Gravity flows accumulated in thrust-top piggyback basins above accretionary melange and dismembered ophiolites and also in a post-collisional peripheral basin above Eurasian crust. Thickening of the accretionary wedge triggered large-scale out-ofsequence thrusting and re-thrusting of cont...

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Section: Palaeocene: Remnant Oceanic Basin or Developing Collisionmentioning

confidence: 99%

Subduction, ophiolite genesis and collision history of Tethys adjacent to the Eurasian continental margin: new evidence from the Eastern Pontides, Turkey

et al. 2013

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“…The late Eocene period corresponds to a large‐scale regional inversion and emersion (Figure e), documented both in the Hekimhan and Darende Basins (Booth et al, ; Booth et al, ), as well as in the Sivas Basin (Legeay, ; Pichat, ). This compressional episode is probably related to the initial retrowedge of the Southern Neotethys subduction and incipient Arabia‐Tauride collision (e.g., Darin et al, ; Legeay, ), which was generally assumed to occur during Oligo‐Miocene time (e.g.Dhont et al, , Gürer & van Hinsbergen, ).…”

Section: Discussionmentioning

confidence: 90%

“…Contemporaneous to possible forearc hyper extension and suprasubduction zone spreading, the lower plate and the northern edge of the Tauride are progressively subducted subsequently, associated with a regional obduction event during the Late Cretaceous (Figure b). Frontward of the obducted ophiolitic nappe, accretionary mélange is imbricated, forming later the basement of the Hekimhan and Darende Basins (Booth et al, ; Booth et al, ). This ophiolitic mélange is probably thinner to the north, or locally absent, such as in the Sivas area.…”

Section: Discussionmentioning

confidence: 99%

“…Previous studies suggest (e.g., Okay & Sahinturk, ) that the late Paleocene to early Eocene compressive stage may result from the collision between the Pontides and the Anatolide‐Tauride block. Interestingly, extension within the Hekimhan/Darende Basins during the same period (Figure d) has been related either to the subduction of Southern Neotethys below the Eastern Tauride and incipient back‐arc opening or to the Eastern Tauride flexure due to loading of crustal‐scale south verging fold‐and‐thrust belt (Booth et al, ).…”

Section: Discussionmentioning

confidence: 99%

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The Pre‐Obduction to Post‐Obduction Evolution of the Sivas Ophiolite (Turkey) and Implications for the Precollisional History of Eastern Anatolia

et al. 2019

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The Anatolian block preserves remnants of Tethyan oceanic basins consumed by north dipping subduction zones until the Late Cretaceous prior to Paleogene collision. The Sivas Basin, which belongs to the Maastrichtian to Cenozoic Central Anatolian basins, is located in a key position limited to the north and the south by respectively the Pontides and Tauride ophiolitic bodies and to the west by the Kırşehir block. This study focuses on the southern margin of the Sivas Basin, where an obducted ophiolite is capped by Maastrichtian‐Paleocene sediments. We present new field observations, with U‐Pb zircon dating on magmatic rocks and geochemical analyses to (1) unravel the pre‐obduction nature and origin of the ophiolitic basement and (2) describe the post‐obduction tectonosedimentary evolution. The pre‐obduction evolution shows that (i) the Sivas ophiolite is characterized by serpentinized peridotites, with minor magmatic intrusions, (ii) the top of the serpentinized mantle is characterized by a cataclastic deformation with ophicalcites interpreted as an extensional detachment fault, (iii) the U‐Pb zircon dating of two magmatic intrusions yield age of 91.49 ± 0.8 Ma and 72.7 ± 0.5 Ma, and (iv) petrological and geochemical data show that the magmatic intrusions were affected by hydrothermal metamorphism. These data suggest that the Sivas ophiolite may have recorded forearc hyperextension in frame of a Late Cretaceous suprasubduction zone. The post‐obduction evolution is characterized by the deposition of a Maastrichtian‐Paleocene carbonate platform on the ophiolite, followed by clastic sediments containing reworked ophiolitic and Tauride Mesozoic clasts.

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“…Situated at the western end of the Arabia-Eurasia collision zone, the Anatolia Orogen represents the type example of a tectonic escape system on Earth (McKenzie, 1972;Dewey and Şengör, 1979;Jackson and McKenzie, 1984). Anatolia hosts numerous sedimentary basins that provide crucial records of orogenic evolution, most of which contain thick Cenozoic sequences that have been well studied and correlated from a stratigraphic perspective (e.g., Görür et al, 1984Görür et al, , 1998Hempton, 1985;Yılmaz, 1993;Gürer and Aldanmaz, 2002;Boulton, 2009;Kaymakci et al, 2009;Rice et al, 2009;Booth et al, 2013). However, there is still significant uncertainty in the tectonic settings of many of these basins (Görür et al, 1998;Gürer and Aldanmaz, 2002;Yılmaz and Yılmaz, 2019).…”

Section: Introductionmentioning

confidence: 99%

Structure and kinematic evolution of the Southern Sivas Fold-Thrust Belt, Sivas Basin, Central Anatolia, Turkey

Darin

Umhoefer²

2019

Turkish J Earth Sci

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The architecture, kinematics, and timing of fold-and-thrust belt development provide essential first-order constraints on the structural evolution of continental collision zones. The southern Sivas fold-thrust belt (SSFTB) is a ~300 × 50-km-long, ENEtrending contractional belt located in the Sivas Basin at the western end of the Arabia-Eurasia collision zone, and along the İzmir-Ankara-Erzincan and Inner Tauride suture zones. We present new geologic mapping and the first detailed structural characterization and seismotectonic evidence of active deformation along the western and central segments of the SSFTB that provide new insights into the timing and kinematics of deformation associated with collision and escape in Central Anatolia. The SSFTB is a dominantly north-vergent contractional belt that initiated during the late Eocene and experienced several punctuated episodes of shortening and exhumation, primarily during the late Oligocene and late Miocene. Structural mapping and balanced cross-sections reveal that minimum cumulative shortening increases from west (29%) to east (34%) along the belt, along with a gradual eastward increase in fold asymmetry and a progressive transition from fold-related to overturned fold-and-thrust-related shortening. The kinematics of the central and eastern SSFTB changed from north-vergent thrusting during the late Eocene and Oligocene to predominantly south-vergent during the Miocene. Contraction in the SSFTB ended by ~7-6 Ma and was followed by a switch to distributed and kinematically linked sinistral strike-slip and normal faulting along the northeastern segment of the Central Anatolian fault zone. Offset strain markers suggest a total of at least 1.7-2.4 km of left-lateral slip on the Deliler fault and ~940 m of normal slip on the Hınzır fault. The latest Miocene to Pliocene switch to intraplate strike-slip deformation marks a regional transition to westward tectonic escape of the Anatolian microplate.

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Two-stage development of the Late Cretaceous to Late Eocene Darende Basin: implications for closure of Neotethys in central eastern Anatolia (Turkey)

Cited by 16 publications

References 62 publications

Subduction, ophiolite genesis and collision history of Tethys adjacent to the Eurasian continental margin: new evidence from the Eastern Pontides, Turkey

Subduction, ophiolite genesis and collision history of Tethys adjacent to the Eurasian continental margin: new evidence from the Eastern Pontides, Turkey

The Pre‐Obduction to Post‐Obduction Evolution of the Sivas Ophiolite (Turkey) and Implications for the Precollisional History of Eastern Anatolia

Structure and kinematic evolution of the Southern Sivas Fold-Thrust Belt, Sivas Basin, Central Anatolia, Turkey

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