Thermochronological evidence for Mio‐Pliocene late orogenic extension in the north‐eastern Albanides (Albania)

Muceku, Bardhyl; Beek, Peter van der; Bernet, Matthias; Reiners, Peter W.; Mascle, Georges; Tashko, Artan

doi:10.1111/j.1365-3121.2008.00803.x

Cited by 19 publications

(35 citation statements)

References 39 publications

(48 reference statements)

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“…3) leads over time to a westward migration of the entire system. Slab roll back is generally associated with uplift as evidenced in the Gibraltar Zone (Duggen et al, 2003) and shown by fission-track dates of Muceku et al (2008). This is also evidenced by the westward migration of the NS extensional domain of Eastern Macedo- Fig.…”

Section: Geodynamic Settingmentioning

confidence: 90%

“…From Pliocene to present E-W extension prevails, which leads to local subsidence, the development of N-S striking normal faults (Aliaj, 2000) and opening of extensional basins. Muceku et al (2008) suggest that the change to an extensional regime occurred at about 6 Ma. Figure 8 presents a panoramic view of the surroundings of the Lini Peninsula.…”

Section: Tectonic Historymentioning

confidence: 99%

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Evolution of ancient Lake Ohrid: a tectonic perspective

et al. 2010

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Abstract. Lake Ohrid Basin is a graben structure situated in the Dinarides at the border of the Former Yugoslavian Republic of Macedonia (FYROM) and Albania. It hosts one of the oldest lakes in Europe and is characterized by a basin and range-like geological setting together with the halfgraben basins of Korca, Erseka and Debar. The basin is surrounded by Paleozoic metamorphics in the northeast and north and Mesozoic ultramafic, carbonatic and magmatic rocks in the east, northwest, west and south. Paleocene to Pliocene units are present in the southwest. With the basin development,

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Section: Geodynamic Settingmentioning

confidence: 90%

Section: Tectonic Historymentioning

confidence: 99%

Evolution of ancient Lake Ohrid: a tectonic perspective

et al. 2010

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“…In their study, the contact between the Mirdita and the Korabi‐Pelagonia zones is shown as a major west dipping normal fault [see Kilias et al ., , Figure ] with the Korabi‐Pelagonia zone occupying the footwall. This structural interpretation is consistent with tectonic studies in the adjacent Republic of Macedonia [e.g., Dumurdzanov et al ., ] and with the documented occurrence of present‐day tensional stress indicators in the Internal Albanides [e.g., Muceku et al ., ] that belong to the South Balkan extensional region [e.g., Dumurdzanov et al ., ].…”

Section: The Korabi‐pelagonia Zonementioning

confidence: 99%

“…On the basis of apatite fission tracks (AFT) dating, Muceku et al . [] suggested that these normal faults formed during the Mio‐Pliocene exhumation of the Korabi‐Pelagonia zone relative to the Mirdita ophiolites. The closure temperature for track retention in apatite is ~100 ± 20°C [e.g., Reiners and Brandon , ], which represents approximately 4 km depth for a temperature gradient of 25°C/km.…”

Section: The Korabi‐pelagonia Zonementioning

confidence: 99%

“…During faulting of the upper crust, the 100°C isotherm can be offset due to fault motion, in which case, the AFT ages of the hanging wall and footwall rocks will also be offset, with the youngest AFT age indicating the earliest possible timing for faulting. For a series of samples taken at more or less the same topographic altitude, AFT ages obtained from the hanging wall rocks of the Gjegjan subzone vary between 21.4 ± 1.4 Ma and 14.7 ± 1.9 Ma, whereas the footwall Korabi subzone yielded younger AFT ages between 17.1 ± 1 Ma and 10.8 ± 0.7 Ma [ Muceku et al ., ]. The discontinuity in AFT ages can be thus interpreted as the result of normal faulting, within errors, at circa 15–10 Ma [ Muceku et al ., ].…”

Section: The Korabi‐pelagonia Zonementioning

confidence: 99%

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The Vardar zone as a suture for the Mirdita ophiolites, Albania: Constraints from the structural analysis of the Korabi-Pelagonia zone

et al. 2015

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The Dinarides-Hellenides result from underthrusting of the Adriatic margin during Africa-Europe convergence. In Albania, they consist of (1) a western zone of nappes derived from Adria; (2) a central belt made up of the Mirdita ophiolites; and (3) an eastern zone, the Korabi-Pelagonia zone, of Variscan basement overlain by Permian to Mesozoic rift deposits and carbonates. Some authors interpret the Korabi-Pelagonia zone as a microcontinent between the Mirdita-Pindos oceanic basin to the west and the eastern Vardar oceanic basin to the east; other regard the Korabi-Pelagonia zone as a tectonic window below a single ophiolitic nappe. This contribution argues for a far-traveled thrust sheet. The Mirdita ophiolites are 165-160 Ma. The metamorphic sole yielded 40 Ar/ 39 Ar ages of 171 to 162 Ma. The Korabi-Pelagonia zone is subdivided into the Korabi and Gjegjan subzones. The structural analysis of these rocks supports the rooting of the Mirdita ophiolites in the Western Vardar zone. The post-Variscan cover sequence of the Korabi subzone records two phases of deformation: D 1 is associated with a SE dipping to flat-lying schistosity axial planar to NW verging folds and thrust faults, related to ophiolite obduction; D 2 is a postobduction NNE trending crenulation cleavage. Published zircon fission track analyses yielded 150-125 Ma, suggesting that regional metamorphism is Early Cretaceous or older. K-Ar mica ages from correlative rocks of Macedonia cluster between 148 and 130 Ma, indicating that D 1 is Late Jurassic. A west directed obduction is favored, as is a rooting east of the Mirdita ophiolites because of the top-to-the-west structural polarity of obduction-related deformation.

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Geodynamic evolution of ophiolites from Albania and Greece (Dinaric-Hellenic belt): one, two, or more oceanic basins?

Bortolotti

Chiari

Marroni

et al. 2012

Int J Earth Sci (Geol Rundsch)

120

126

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All the geological constraints for an exhaustive reconstruction of the Triassic to Tertiary tectonic history of the southern Dinaric-Hellenic belt can be found in Albania and Greece. This article aims to schematically reconstruct this long tectonic evolution primarily based on a detailed analysis of the tectonic setting, the stratigraphy, the geochemistry, and the age of the ophiolites. In contrast to what was previously reported in the literature, we propose a new subdivision on a regional scale of the ophiolite complexes cropping out in Albania and Greece. This new subdivision includes six types of ophiolite occurrences, each corresponding to different tectonic units derived from a single obducted sheet. These units are represented by: (1) subophiolite me ´lange, (2) Triassic ocean-floor ophiolites, (3) metamorphic soles, (4) Jurassic fore-arc ophiolites, (5) Jurassic intra-oceanic-arc ophiolites, and (6) Jurassic backarc basin ophiolites. The overall features of these ophiolites are coherent with the existence of a single, though composite, oceanic basin located east of the Adria/Pelagonian continental margin. This oceanic basin was originated during the Middle Triassic and was subsequently (Early Jurassic) affected by an east-dipping intra-oceanic subduction. This subduction was responsible for the birth of intra-oceanic-arc and back-arc oceanic basins separated by a continental volcanic arc during the Early to Middle Jurassic. From the uppermost Middle Jurassic to the Early Cretaceous, an obduction developed, during which the ophiolites were thrust westwards firstly onto the neighboring oceanic lithosphere and then onto the Adria margin.

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Thermochronological evidence for Mio‐Pliocene late orogenic extension in the north‐eastern Albanides (Albania)

Cited by 19 publications

References 39 publications

Evolution of ancient Lake Ohrid: a tectonic perspective

Evolution of ancient Lake Ohrid: a tectonic perspective

The Vardar zone as a suture for the Mirdita ophiolites, Albania: Constraints from the structural analysis of the Korabi-Pelagonia zone

Geodynamic evolution of ophiolites from Albania and Greece (Dinaric-Hellenic belt): one, two, or more oceanic basins?

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