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Evolution verticale des Albanides :
Contrôle thermique, érosion et dénudation tectonique

Abstract : Albania occupies a critical position within the Dinaro-Hellenic alpine mountain belt. This orogen is characterized by three fundamental components: a Western (External) Fold-and-Thrust Belt, a Central Belt characterized by the occurrence of ophiolitic nappes, and an Eastern (Internal) Complex.
The application of fission track (FT) and (U-Th)/He thermochronology helps us to better understand the cooling history of the western and eastern Internal Albanides in Albania. Slow cooling and low rate of exhumation (< 0.1 km/m.y.) characterize of the northern and western Internal Albanides throughout Late Eocene-Early Oligocene times, and are possibly related to isostatic uplift as a consequence of crustal thickening near the frontal thrust, during tectonic emplacement of the internal units on top of the external Fold-and-Thrust Belt.
We propose that the present-day symmetric structure of the ophiolite units in the Internal Albanides is a result of Miocene-Pliocene extensional collapse, affecting the eastern ophiolites and the Korabi zone. (U-Th)/He and FT data allow determining the beginning of this extensional phase at around 20 Ma. Exhumation of Korabi zone rocks accelerated since 3-6 Ma, reaching a rate of about 1.2 km/m.y.
This study demonstrates that the combination of (U-Th)/He and FT thermochronology is a powerful means to better constrain the exhumation history of an orogenic wedge in the front and back of a continental subduction regime.
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Contributor : Bardhyl Muceku <>
Submitted on : Sunday, July 8, 2007 - 2:44:35 PM
Last modification on : Thursday, November 19, 2020 - 3:54:26 PM
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  • HAL Id : tel-00160801, version 1



Bardhyl Muceku. Evolution verticale des Albanides :
Contrôle thermique, érosion et dénudation tectonique. Géologie appliquée. Université Joseph-Fourier - Grenoble I, 2006. Français. ⟨tel-00160801⟩



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