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  • 1
    Call number: M 02.0077
    In: Peri-Tethys memoir
    Type of Medium: Monograph available for loan
    Pages: 762 S.
    ISBN: 2856535283
    Series Statement: 185
    Classification:
    Tectonics
    Language: English
    Location: Upper compact magazine
    Branch Library: GFZ Library
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  • 2
    Monograph available for loan
    Monograph available for loan
    London : The Geological Society
    Associated volumes
    Call number: 9/M 06.0618
    In: Geological Society special publication
    Description / Table of Contents: The Eastern Mediterranean region is a classic area for the study of tectonic processes and settings related to the development of the Tethyan orogenic belt. The present set of research and synthesis papers by Earth scientists from countries in this region and others provides an up-to-date, interdisciplinary overview of the tectonic development of the Eastern Mediterranean region from Precambrian to Recent. Key topics include continental rifting, ophiolite genesis and emplacement, continental collision, extensional tectonics, crustal exhumation and intra-plate deformation (e.g. active faulting). Alternative tectonic reconstructions of the Tethyan orogen are presented and discussed, with important implications for other regions of the world. The book will be an essential source of information and interpretation for academic researchers (geologists and geophysicists), advanced undergraduates and also for industry professionals, including those concerned with hydrocarbons, minerals and geological hazards (e.g. earthquakes).
    Type of Medium: Monograph available for loan
    Pages: 717 S. , Ill., graph. Darst., Kt.
    ISBN: 186239198X
    Series Statement: Geological Society special publication 260
    Classification:
    Tectonics
    Location: Reading room
    Branch Library: GFZ Library
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  • 3
    Call number: 9/M 07.0421(372)
    In: Geological Society special publication
    Type of Medium: Monograph available for loan
    Pages: VI, 649 S. : z.T. farb. Ill. und graph. Darst.
    ISBN: 9781862393530
    Series Statement: Geological Society special publication 372
    Classification:
    Historical Geology
    Location: Reading room
    Branch Library: GFZ Library
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  • 4
    ISSN: 1365-3121
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: New radiolarian biostratigraphical data have shed light on the Mesozoic tectonic evolution of South-Tethys in the Baer–Bassit region of NW Syria. Radiolarian assemblages of Late Triassic, Middle Jurassic and Early Cretaceous age were extracted from radiolarites in five measured sections. The results are compared with published radiolarian ages from the Mamonia Complex, western Cyprus. These two areas are interpreted as preserved fragments of the conjugate margins of a small South Tethyan oceanic basin formed by Triassic rifting. In the southerly (i.e. Arabian) margin, proximal successions were dominated by shallow-water-derived carbonate, whereas distal successions reveal seamount-type alkaline/peralkaline volcanism, dated as both Late Triassic and Middle Jurassic–Early Cretaceous. Along the inferred northern margin (i.e. western Cyprus) proximal successions are dominantly terrigenous, whereas distal settings include Late Triassic oceanic crust and seamount-type lavas.
    Type of Medium: Electronic Resource
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  • 5
    Publication Date: 2013-07-04
    Description: The development of the central Tauride region was dominated by rifting and passive margin development during Triassic–Early Cretaceous. The Tauride continental margin was later destabilized, followed by subsidence and collapse to form a flexurally controlled foredeep. Volcanic–sedimentary mélange and ophiolitic rocks were thrust onto the northern margin of the Tauride carbonate platform (Geyik Dağ) during Campanian–Maastrichtian. The remaining non-emplaced Tauride shelf subsided to form a second-stage foredeep during the Eocene. This basin was finally over-ridden by large thrust slices of Tauride shelf sediments, represented by the Hadim and Bolkar nappes, together with previously emplaced continental margin and ophiolitic units. Large- and small-scale field kinematic data indicate regional emplacement towards the west or SW. The ophiolitic rocks and related mélange were emplaced directly onto the Tauride autochthon (Geyik Dağ) in response to regional-scale out-of-sequence thrusting. Localized backthrusting to the NE took place in a transpressive setting. In the south, the relatively distal Bolkar nappe was emplaced over the more proximal Hadim nappe to produce the present thrust stacking order. The two-phase emplacement reflects initial northward subduction, which culminated in trench-continental margin collision (Campanian–Maastrichtian). This was followed by continent–continent collision (Eocene) related to suturing of a Mesozoic ocean basin to the north.
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  • 6
    Publication Date: 2013-07-04
    Description: The El-Kabir Lineament and the El-Kabir Basin further south form part of the southernmost of several sinistral strike-slip lineaments that characterize the distributed Africa–Eurasian collision zone in the easternmost Mediterranean region. Based on onshore field evidence and offshore two-dimensional (2D) seismic evidence, the El-Kabir fault lineament is interpreted as a sinistral strike-slip fault zone that was active at least from Middle Eocene time onwards. The El-Kabir Lineament was probably active in a transpressional mode during Middle Eocene–Early Miocene(?). The fault lineament was then active in a transtensional mode during Miocene–Recent time. The transtension resulted in the formation of the adjacent NE–SW El-Kabir Basin. Continuing subsidence provided the accommodation space for thick sediment accumulation (〉3 km) within the El-Kabir Basin and its offshore extension (roughly corresponding to the Latakia Basin). Offshore 2D seismic data confirm that the basin is fault-bounded and that it continued to be active during Pliocene–Recent time. To the NE, the NE–SW El-Kabir Lineament is truncated and offset by the north–south-trending Dead Sea Transform Fault Zone (Ghab Graben), which propagated northwards during the Pliocene. The inferred Neogene–Recent transtension is explicable by kinematic linkage with oceanic crust in the easternmost Mediterranean that is likely to have experienced contemporaneous subduction zone rollback.
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  • 7
    Publication Date: 2007-10-08
    Description: The Vardar Zone documents the Mesozoic-Early Cenozoic evolution of several small oceanic basins and a complex history of terrane assembly. Following a Hercynian phase of deformation and granitic intrusion within the Pelagonian Zone to the west, the Vardar Zone rifted in Permian-Triassic time, with the creation of an oceanic basin (Almopias Ocean) during the Late Triassic-Early Jurassic. During the Mid-Jurassic, this ocean subducted northeastwards beneath the Paikon Zone and the Serbo-Macedonian Zone, giving rise to arc volcanism and back-arc rifting. A second ocean basin, the Pindos Ocean, opened to the west of a Pelagonian microcontinent, also during Late Triassic-Early Jurassic time. During the Mid-Late Jurassic, ophiolites were emplaced northeastwards (in present co-ordinates) from the Pindos Ocean onto the Pelagonian microcontinent, forming the Pelagonian ophiolitic melange within a flexural foredeep. This emplacement is dated at pre-Late Oxfordian-Early Kimmeridgian from the evidence of corals within neritic carbonates that depositionally overlie the emplaced ophiolitic rocks in several areas. Related greenschist- or amphibolite-facies metamorphism is attributed to deep burial following trench-margin collision and the attempted subduction of the Pelagonian continent. An inferred phase of NNW-SSE displacement, also of pre-latest Jurassic age, imparted a regionally persistent stretching lineation and related ductile fabric, apparently related to post-collisional strike-slip. The Pelagonian Zone and its emplaced ophiolitic rocks then underwent extensional exhumation during Late Jurassic-Early Cretaceous time. The western margin of the Vardar Zone experienced extensional (or transtensional) faulting, neritic carbonate and terrigenous clastic deposition, and intermediate-silicic magmatism during Late Jurassic-Early Cretaceous time. Oceanic crust (Meglenitsa Ophiolite) formed further east in the Vardar Zone during Late Jurassic-Early Cretaceous time, possibly above a subduction zone. A near-margin setting is suggested by the presence of a deep-water terrigenous cover, probably derived from the Paikon continental unit to the east. The Vardar Zone as a whole finally closed related to eastward subduction beneath Eurasia, culminating in collision with the Pelagonian microcontinent during latest Cretaceous-Eocene time, as recorded in foreland basin development, HP-LT metamorphism, ophiolite emplacement and large-scale westward thrusting. In contrast to models that suggest closure of the Vardar Ocean in the Mid-Late Jurassic, followed by reopening of a Cretaceous ocean, we believe that the Vardar Ocean remained partly open from Triassic to Late Cretaceous-Early Cenozoic time.
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  • 8
    Publication Date: 2007-10-08
    Description: The Izmir-Ankara-Erzincan suture zone (IAESZ) in the Central and the Eastern Pontides comprises a stack of thrust sheets of mainly Late Cretaceous-Early Cenozoic age that are restored as: (1) a subduction-accretion complex; (2) a continental-margin magmatic arc, plus an associated forearc basin; (3) a back-arc basin and its mainly sedimentary fill. Northward thrusting affected all of the Late Cretaceous units during latest Cretaceous (Campanian-Maastrichtian) time. This was followed by regional southward thrusting to form the present thrust stack during Mid-Eocene time. Alternative tectonic models are considered in the light of sedimentary, igneous geochemical and structural evidence, and global comparisons. We infer that the Northern Neotethys was subducted northwards beneath the Eurasian active margin during the Late Cretaceous. Subduction was associated with the genesis of a magmatic arc and a related forearc basin. The subduction zone retreated oceanwards, associated with the opening of a back-arc basin along the Eurasian margin, floored by oceanic crust and overlain by mixed terrigenous and volcaniclastic deep-marine sediments. Ophiolite genesis in a continental margin back-arc setting is suggested by the presence of screens of basement-type metamorphic rocks within an ophiolite-related sheeted dyke complex in the Eastern Pontides. During the latest Cretaceous closure of the inferred back-arc basin resulted in northward emplacement of ophiolitic and related units onto the Eurasian margin, as well exposed in the Central Pontides. In addition, accretionary melange, volcanic arc, forearc and ophiolitic units were emplaced southwards onto the Tauride continent, represented by the Munzur platform in the Eastern Pontides, also during latest Cretaceous time. This incipient ( soft') collision was followed by widespread Paleocene-Early Eocene deposition of Nummulitic shelf carbonates and coarse clastic sediments on deformed and emplaced accretionary melange, arc and ophiolitic units. Final closure ( hard collision') of the Northern Neotethys occurred during the Mid-Eocene, resulting in large-scale southward imbrication, together with northward backthrusting in some areas. Suture tightening and Plio-Quaternary strike-slip ensued.
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  • 9
    Publication Date: 2009-04-30
    Description: The Tauride-Anatolide continent, stretching for c. 900 km across western and central Turkey, is one of the world's best example of a subducted, exhumed passive margin within a collisional orogen. Twelve widely separated areas were studied and correlated to develop a new plate-tectonic model. A metamorphosed, rifted continental margin of Triassic-Lower Cretaceous age (Tauride-Anatolide platform) is overlain by Upper Cretaceous (Cenomanian-Lower Maastrichtian) pelagic sediments and then by both tectonic melange (subduction complexes) and sedimentary melange (foredeep gravity complexes). The melanges are overthrust by unmetamorphosed ophiolitic rocks, commonly peridotites with swarms of diabase/gabbro dykes, and are underlain by metamorphic soles. New geochemical evidence from basaltic blocks in the melange indicates predominantly subduction influenced, within-plate and mid-ocean ridge-type settings. The dykes cutting the ophiolites were probably intruded during early-stage intra-oceanic arc genesis. The metamorphosed continental margin, melanges and ophiolites in the north (Anatolides) are correlated with unmetamorphosed equivalents in the Taurides further south (e.g. Bey[s]ehir and Lycian nappes). Oceanic crust of Triassic-Late Cretaceous age formed between the Gondwana-related Tauride-Anatolide continent in the south and the Eurasia-related Sakarya microcontinent in the north. Following Late Triassic-Early Cretaceous passive margin subsidence, the continental margin was covered by Cenomanian-Turonian pelagic carbonates (c. 98-90 Ma). Ophiolites formed in an intra-oceanic subduction zone setting in response to northward subduction, probably within a two-stranded ocean, with the Inner Tauride ocean in the SE and the [I]zmir-Ankara-Erzincan ocean in the north/NW. Metamorphic soles relate to intra-oceanic subduction (c. 95-90 Ma). Oceanic sedimentary/igneous rocks accreted to the advancing supra-subduction oceanic slab. The Tauride-Anatolide continental margin then underwent diachronous collision with the trench (c. 85 Ma), deeply subducted and metamorphosed at HP/LT (c. 80 Ma). Accretionary, ophiolitic and exhumed HP/LT rocks were gravity reworked into a southward-migrating flexural foredeep and progressively overridden (c. 70-63 Ma). Slices of the upper part of the platform and its margin detached and were thrust southwards as the (Tauride) Lycian and Bey[s]ehir nappes, together with regional-scale ophiolites. The continental margin and melange were simultaneously exhumed during Maastrichtian-Early Paleocene (70-63 Ma) and transgressed by shallow-water sediments, beginning in the Late Maastrichtian in the east (c. 64 Ma) and the Mid?-Late Paleocene (c. 60 Ma) further west. Remnant oceanic crust was consumed during Early Cenozoic time, followed by Mid Eocene (45-40 Ma) diachronous continental collision and a second phase of regional deformation. Rather than being progressive there were two stages of collision: first, Upper Cretaceous ophiolite emplacement driven by continental margin-subduction trench collision, and secondly Eocene collision of the Tauride and Sakarya/Eurasian continents.
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  • 10
    Publication Date: 2013-07-04
    Description: Reconstructions of the Anatolian continent and adjacent areas assume the existence of one or more continental fragments during Mesozoic–Early Cenozoic time. These rifted from North Africa (Gondwana) during the Triassic, drifted across the Mesozoic Tethys and collided with Eurasia during latest Cretaceous–Paleocene time. Current reconstructions range from a regional-scale Tauride–Anatolide continent with oceanic basins to the north and south, to numerous rifted continental fragments separated by small oceanic basins. Field-based evidence for the inter-relations of the continental blocks and associated carbonate platforms is discussed and evaluated here, especially to distinguish between sutured oceans and intra-continental convergence zones. Several crustal units are restored as different parts of one large Tauride–Anatolide continent, whereas several smaller crustal units (e.g. Kırşehir massif; Bitlis/Pütürge and Alanya/Kyrenia units) are interpreted as continental fragments bordered by oceanic crust. We infer a relatively wide İzmir–Ankara–Erzincan ocean in the north and also a wide South Neotethyan ocean in the south. Several smaller oceanic strands (e.g. Inner Tauride ocean, Berit ocean and Alanya ocean) were separated by continental fragments. Our proposed reconstructions are shown on palaeotectonic maps for Late Permian to Mid-Miocene. The reconstructions have interesting implications for crustal processes, including ophiolite genesis and emplacement.
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