Geochronological and structural investigations of the Northern Pelagonian crystalline zone. Constraints from K/Ar and zircon and apatite fission track dating

Most, T.; Frisch, Wolfgang; Dunkl, İstván; Kadosa, B.; Boev, Blažo; Avgerinas, A.; Κίλιας, Αδαμάντιος

doi:10.12681/bgsg.16947

Cited by 26 publications

(35 citation statements)

References 2 publications

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“…1b). To the south, they vary from 76 to 32 Ma (Most et al, 2001;Most, 2003;Vamvaka et al, 2010). Younger, 35-32 Ma old ZFT ages are located close to the Olympos window (Fig.…”

Section: Previously Published Low-temperature Thermochronometric Datamentioning

confidence: 95%

“…1c) are 46-25 Ma in northern Pelagonia (Most et al, 2001;Most, 2003), 41-25 Ma in the southwest (Vamvaka et al, 2010;Coutand et al, 2014) and 18-11 Ma in the southeast (Most, 2003;Coutand et al, 2014). The few data in the AVAZ are 60-47 Ma (Most et al, 2001;Most, 2003). The western Rhodope also yielded AFT ages from 68 to 47 Ma (Kydonakis et al, 2014).…”

Section: Previously Published Low-temperature Thermochronometric Datamentioning

confidence: 97%

“…ZFT ages (Most et al, 2001;Most, 2003;Vamvaka et al, 2010) range between 86 and 61 Ma in the eastern part of north Pelagonia and span between 53 and 39 Ma in the western part (Fig. 1b).…”

Section: Previously Published Low-temperature Thermochronometric Datamentioning

confidence: 99%

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Polyphase evolution of Pelagonia (northern Greece) revealed by geological and fission-track data

2015

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Abstract. The Pelagonian zone, situated between the External Hellenides/Cyclades to the west and the Axios/Vardar/Almopias zone (AVAZ) and the Rhodope to the east, was involved in late Early Cretaceous and in Late Cretaceous-Eocene orogenic events whose duration and extent are still controversial. This paper constrains their late thermal imprints. New and previously published zircon (ZFT) and apatite (AFT) fission-track ages show cooling below 240 • C of the metamorphic western AVAZ imbricates between 102 and 93-90 Ma, of northern Pelagonia between 86 and 68 Ma, of the eastern AVAZ at 80 Ma and of the western Rhodope at 72 Ma. At the regional scale, this heterogeneous cooling is coeval with subsidence of Late Cretaceous marine basin(s) that unconformably covered the Early Cretaceous (130-110 Ma) thrust system from 100 Ma. Thrusting resumed at 70 Ma in the AVAZ and migrated across Pelagonia to reach the External Hellenides at 40-38 Ma. Renewed thrusting in Pelagonia is attested at 68 Ma by abrupt and rapid cooling below 240 • C and erosion of the gneissic rocks. ZFT and AFT in western and eastern Pelagonia, respectively, testify at ∼ 40 Ma to the latest thermal imprint related to thrusting. Central-eastern Pelagonia cooled rapidly and uniformly from 240 to 80 • C between 24 and 16 Ma in the footwall of a major extensional fault. Extension started even earlier, at ∼ 33 Ma in the western AVAZ. Post-7 Ma rapid cooling is inferred from inverse modeling of AFT lengths. It occurred while E-W normal faults were cutting Pliocene-torecent sediment.

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“…1b). To the south, they vary from 76 to 32 Ma (Most et al, 2001;Most, 2003;Vamvaka et al, 2010). Younger, 35-32 Ma old ZFT ages are located close to the Olympos window (Fig.…”

Section: Previously Published Low-temperature Thermochronometric Datamentioning

confidence: 95%

Section: Previously Published Low-temperature Thermochronometric Datamentioning

confidence: 97%

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Polyphase evolution of Pelagonia (northern Greece) revealed by geological and fission-track data

2015

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“…Parts of the lower Paikon units (Gandatch and volcanosedimentary units) were detached and buried in a depth of at least 20km beneath an emplacing part of oceanic lithosphere in response to continental margin-trench collision and collision of the Paikon continental margin with the oceanic lithosphere of the Axios Ocean. Most et al (2001) and Kilias et al (2010) in the eastern margin of the Pelagonian nappe described similar geotectonic conditions. During D1 the HP/LT metamorphic rocks, came back to shallower crustal levels and were strongly deformed and imbricated.…”

Section: D1 Eventmentioning

confidence: 58%

Deformation History and Correlation of Paikon and Tzena Terranes (Axios Zone, Central Macedonia, Greece)

2017

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Paikon and Tzena terranes are situated in the centre part of Axios zone, between Almopia and Paionia ophiolitic belts. Tectonostratigraphic data reveal that both have been affected by the same polyphase deformation and metamorphism, as well that they have the same lithostratigraphic column. The first deformation phase took place during the Middle to Late Jurassic and is associated with ophiolite obduction, nappe -stacking, terrane accretion and crustal thickening (D1). Metamorphism does not exceed greenschist facies (M1

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“…For these zircon populations, the Late Jurassic to Early Cretaceous age clusters are characteristic. The potential source units of this material are Pelagonian crystalline slices displaying Mesozoic thermal resetting during extension in the course of the opening of the Pindos-Vadar ocean (Jacobshagen et al, 1986;Robertson and Karamata, 1994;Most et al, 2001).…”

Section: Provenancementioning

confidence: 99%

Miocene siliciclastic deposits of Naxos Island: Geodynamic and environmental implications for the evolution of the southern Aegean Sea (Greece)

Kuhlemann¹,

Frisch²,

Dunkl³

et al. 2004

Detrital Thermochronology - Provenance Analysis, Exhumation, and Landscape Evolution of Mountain Belts

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An interdisciplinary study has been carried out on Naxos Island, located in the southern Aegean Sea (Greece), which shows Miocene geodynamic and environmental changes in a classic example of a collapsing orogen. Early to mid-Miocene siliciclastic deposits on Naxos have been shed from an uplifting mountainous realm in the south, which included a patchwork of at least four source terrains of different thermal histories. Petrography of pebbles suggests that the source units formed part of a passive continental margin succession (external Pelagonian unit), and an ophiolite succession mainly of deep-water cherts and limestones deposited on basalt substratum (Pindos unit). The continental margin source contributed rounded zircon crystals of Late Jurassic to Early Cretaceous age and broadly scattering Paleozoic zircon fission-track cooling ages. A distal pebble assemblage of Paleogene shallow-water carbonates passing into flysch-like, mixed calcarenitic and siliciclastic components with volcanic arc components is subordinately present. High-grade metamorphic components from the nearby metamorphic core complex are not present.The depositional evolution reflects increasing relief and, in some parts, a fluvial succession with rhythmic channel deposition, possibly due to runoff variability forced by orbital cyclicity. Upsection, the depositional trend indicates increasing seasonality and decreasing humidity in the source region.The Miocene sedimentary succession has been deposited on an ophiolite nappe. Juxtaposition of this ophiolite nappe occurred as an extensional allochthon during large-scale extension in the Aegean region at the margins of an exhuming metamorphic core complex.

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Geochronological and structural investigations of the Northern Pelagonian crystalline zone. Constraints from K/Ar and zircon and apatite fission track dating

Cited by 26 publications

References 2 publications

Polyphase evolution of Pelagonia (northern Greece) revealed by geological and fission-track data

Polyphase evolution of Pelagonia (northern Greece) revealed by geological and fission-track data

Deformation History and Correlation of Paikon and Tzena Terranes (Axios Zone, Central Macedonia, Greece)

Miocene siliciclastic deposits of Naxos Island: Geodynamic and environmental implications for the evolution of the southern Aegean Sea (Greece)

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