Terrane Map of Europe

Oczlon, Martin S.

doi:10.1127/1864-5658/08/9501-0129

Cited by 6 publications

(5 citation statements)

References 2 publications

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“…Terrane map of the NE Mediterranean. In inset: the peri‐Gondwanan landmass in Europe (after Oczlon, ; Oczlon et al, ). Most of the Avalonian terranes are located between the Caledonian (TESZ) and Variscan front; most of the Cadomian terranes are located to the south of the Variscan front.…”

Section: Introductionmentioning

confidence: 99%

New Detrital Zircon Geochronology From the Cycladic Basement (Greece): Implications for the Paleozoic Accretion of Peri‐Gondwanan Terranes to Laurussia

2018

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Between the eastern Mediterranean basin in the South and the East European (Baltica) Craton to the north, we distinguish two fundamental pre‐Variscan geological domains: an Internal domain, which hosts Ordovician‐Devonian (450–400 Ma) igneous rocks and detrital zircon populations, and an External domain, which contains no 450‐ to 400‐Ma zircon ages. From the Balkan Peninsula to the Turkish plate, the aforementioned Internal domain includes the Serbo‐Macedonian Massif, the Istanbul and Sakarya terranes, whereas the External domain, holding a more distal position relative to Baltica, includes the Pelagonian terrane and the External Hellenides. The two domains are interpreted as two consecutive (i.e., Caledonian and Variscan) Paleozoic accretionary belts, attached to the southern margin of Baltica. The Cycladic and Pelagonian terranes are currently juxtaposed along strike of the central Hellenides in Northern Greece. The Cycladic Massif is a Cadomian‐type terrane, while the Pelagonian displays an Avalonian‐type affinity. Despite its Avalonian affinity, the Pelagonian lacks Ordovician‐Devonian (450–400‐Ma) zircon ages. In contrast, detrital zircon grains of such ages are abundant in the Cycladic Massif. In this study, the Ordovician‐Devonian detrital zircon population is recognized also in pre‐Variscan (>310‐Ma) Cycladic Basement from Ios and Naxos Islands, affiliating the Cycladic Massif with the Internal (Caledonian) domain. This indicates that the Caledonian accretion incorporated some Cadomian‐type terranes. It also suggests that the protolith of the Cycladic blueschists was deposited within the Internal domain, that is, northeast of the Pelagonian terrane. This recognition helps to reconstruct the Paleozoic and Mesozoic paleogeography of the peri‐Gondwanan terranes.

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Section: Introductionmentioning

confidence: 99%

New Detrital Zircon Geochronology From the Cycladic Basement (Greece): Implications for the Paleozoic Accretion of Peri‐Gondwanan Terranes to Laurussia

2018

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“…Main tectonic settings of Vrancea and adjacent area (simplified afterPolonic (1996) andOczlon (2006). Crosses indicate the epicenters of the intermediate depth events used in this study.…”

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confidence: 99%

Crustal thickness in Vrancea area, Romania from S to P converted waves

Ivan

2011

J Seismol

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Crustal thickness (CT) in Vrancea region (Romania) and adjacent area is investigated using 1294 S to P converted waves from the Moho discontinuity. A total of 269 local earthquakes in the depth range 99.8 to 171.1 km and recorded by 76 permanent and 46 temporary stations of the Romanian Seismological Network are used. Time difference between the converted wave and the direct P phase is corrected to a first order for epicentral distance and for the errors in focal depth, being finally inverted to CT. Greatest values for the Moho depth are observed for stations located in the Carpathians molasse foredeep and smaller values are observed in the Southern part of the Moesian Platform, for stations in the eastern part of Moldavian (East-European) Platform and in Dobrogea area, close to the Black Sea shoreline. In Vrancea epicentral area, an important CT variation is observed, from 42 km at MLR and 41.8 km at SIR, stations placed in the southwestern part of the epicentral area, to 30.9 km at VRI, located above northeastern part of the seismogenic volume. Stations CVO and OZU, placed in Transylvanian Basin in the proximity of the epicentral area, have CT values of 32.1 and 24.1 km, respectively. The results seem to support that a mantle delamination process is responsible for Vrancea intermediate depth seismicity. S to P converted waves, crustal thickness, Vrancea (Romania) 1 Introduction Vrancea zone is one of the most active intra-continental seismic areas in Europe (Fig. 1), with potential seismic hazard associated to a few intermediate depth

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“…This opening was associated with separation of the Anatolide‐Tauride block from Gondwana and northward drifting of this block until final collision with Laurussia during Eocene (Okay et al, ). As suggested in many Permo‐Triassic paleogeographical reconstructions for the Tethyan realm (Blakey, ; Oczlon, ; Stampfli, ), this nearly synchronous drifting of the continental blocks in opposite directions from both margins of the Paleotethys entails the existence of a transform fault system controlling these relative movements. As a result of this geological evidence, our tectonic model given below relies on the view placing the Pelagonian, CB, and Sakarya to the southern margin of Laurussia in the Triassic.…”

Section: Discussionmentioning

confidence: 78%

P–T–tevolution of the Cycladic Blueschist Unit in Western Anatolia/Turkey: Geodynamic implications for the Aegean region

Çetinkaplan

Candan

Oberhänsli

et al. 2020

Journal Metamorphic Geology

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Eclogite and blueschist facies rocks occurring as a tectonic unit between the underlying Menderes Massif (MM) and the overlying Afyon Zone/Lycian Nappes and the Bornova Flysch Zone in western Anatolia represent the eastward continuation of the Cycladic Blueschist Unit (CBU) in Turkey. This high-P unit is attributed to the closure of the Pindos Ocean and consists of (a) a Triassic to Upper Cretaceous coherent series derived from passive continental margin sediments and (b) the tectonically overlying Upper Cretaceous Selçuk mélange with eclogite blocks embedded in a pelitic epidote-blueschist matrix. The coherent series has experienced epidote-blueschist facies metamorphism (490 ± 25°C/11.5 ± 1.5 kbar; 38 km depth). 40 Ar/ 39 Ar white mica and 206 Pb/ 238 U monazite dating of quartz metaconglomerate from coherent series yielded middle Eocene ages of 44 ± 0.3 and 40.1 ± 3.1 Ma for epidote-blueschist facies metamorphism, respectively. The epidote-blueschist facies metamorphism of the matrix of the Selçuk mélange culminates at 520 ± 15°C/13 ± 1.5 kbar, 43 km depth, and is dated at 57.5 ± 0.3-54.5 ± 0.1 Ma ( 40 Ar/ 39 Ar phengite). Eclogite facies metamorphism of the blocks (570 ± 30°C/18 ± 2 kbar, 60 km depth) is early Eocene and dated at 56.2 ± 1.5 Ma by 206 Pb/ 238 U zircon. Eclogites experienced a nearly isothermal retrogression (490 ± 40°C/~6 to 7 kbar) during their incorporation into the Selçuk mélange. The retrograde overprints of the coherent series (410 ± 15°C/7 ± 1.5 kbar from Dilek Peninsula and 485 ± 33°C/~6 to 7 kbar from Selçuk-Tire area) and the Selçuk mélange (510 ± 15°C/6 ± 1 kbar) are dated at 35.8 ± 0.5-34.3 ± 0.1 Ma by 40 Ar/ 39 Ar white mica and 31.6 ± 6.6 Ma by 206 Pb/ 238 U allanite dating methods, respectively. Regional geological constrains reveal that the contact between the MM and the CBU originally formed a lithosphere-scale transform fault zone. 40 Ar/ 39 Ar white mica age from the contact indicates that the CBU and the MM were tectonically juxtaposed under greenschist facies conditions during late Eocene, 35.1 ± 0.3 Ma. K E Y W O R D S Cycladic Blueschist Unit, eclogite, Menderes Massif, Pindos Ocean, Selçuk mélange 380 | ÇETINKAPLAN ET AL. | 381 ÇETINKAPLAN ET AL. Note: (1) Quartz metaconglomerate; (2) blueschist metabasite; (3) eclogite; (4) omphacite epidotite; (5) omphacite metagabbro; (6) blueschist metabasite; (7) garnet-phengite schist; (8) garnet-biotite schist.

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Terrane Map of Europe

Cited by 6 publications

References 2 publications

New Detrital Zircon Geochronology From the Cycladic Basement (Greece): Implications for the Paleozoic Accretion of Peri‐Gondwanan Terranes to Laurussia

New Detrital Zircon Geochronology From the Cycladic Basement (Greece): Implications for the Paleozoic Accretion of Peri‐Gondwanan Terranes to Laurussia

Crustal thickness in Vrancea area, Romania from S to P converted waves

P–T–tevolution of the Cycladic Blueschist Unit in Western Anatolia/Turkey: Geodynamic implications for the Aegean region

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