The geological signature of a slab tear below the Aegean

Laurent Jolivet; Armel Menant; Pietro Sternai; Aurélien Rabillard; Laurent Arbaret; Romain Augier; Valentin Laurent; Alexandre Beaudoin; Bernhard Grasemann; Benjamin Huet; Loic Labrousse; Laetitia Le Pourhiet

doi:10.1016/j.tecto.2015.08.004

The geological signature of a slab tear below the Aegean

Laurent Jolivet, Armel Menant, Pietro Sternai, Aurélien Rabillard, Laurent Arbaret, Romain Augier, Valentin Laurent, Alexandre Beaudoin, Bernhard Grasemann, Benjamin Huet, Loic Labrousse, Laetitia Le Pourhiet

Department of Geology

Publications: Contribution to journal › Article › Peer Reviewed

Abstract

In this paper we explore the geology of the Aegean region in the Miocene to identify the geological signature of a first-order slab tear observed in all tomographic models. From 15 to 8. Ma, the tear is associated, spatially and timely, with a fast clockwise rotation of the External Hellenides, alkaline volcanism, high-temperature metamorphic domes with a predominance of north-dipping detachments, and south-westward migration of granitoid intrusions. These features suggest a warmer geodynamic environment during the rotation and the impact of a hot mantle flow associated with the tear. The ~. 8. Ma duration between the first high-temperature metamorphic domes in the centre of the archipelago and the beginning of the fast rotation may correspond to the time needed for the slab to bend, stretch and finally tear.

Original language	English
Pages (from-to)	166-182
Number of pages	17
Journal	Tectonophysics
Volume	659
DOIs	https://doi.org/10.1016/j.tecto.2015.08.004
Publication status	Published - 30 Sept 2015

Austrian Fields of Science 2012

105106 Geodynamics

Keywords

Aegean
BACK-ARC EXTENSION
Backarc extension
CYCLADIC DETACHMENT SYSTEM
Detachments
GEODYNAMIC EVOLUTION
HIGH-PRESSURE METAMORPHISM
MENDERES MASSIF
METAMORPHIC CORE COMPLEX
Mediterranean
Metamorphic core complexes
NAXOS CYCLADES
STRUCTURAL EVOLUTION
Slab tear
TECTONIC EVOLUTION
WESTERN TURKEY

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title = "The geological signature of a slab tear below the Aegean",

abstract = "In this paper we explore the geology of the Aegean region in the Miocene to identify the geological signature of a first-order slab tear observed in all tomographic models. From 15 to 8. Ma, the tear is associated, spatially and timely, with a fast clockwise rotation of the External Hellenides, alkaline volcanism, high-temperature metamorphic domes with a predominance of north-dipping detachments, and south-westward migration of granitoid intrusions. These features suggest a warmer geodynamic environment during the rotation and the impact of a hot mantle flow associated with the tear. The ~. 8. Ma duration between the first high-temperature metamorphic domes in the centre of the archipelago and the beginning of the fast rotation may correspond to the time needed for the slab to bend, stretch and finally tear.",

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author = "Laurent Jolivet and Armel Menant and Pietro Sternai and Aur{\'e}lien Rabillard and Laurent Arbaret and Romain Augier and Valentin Laurent and Alexandre Beaudoin and Bernhard Grasemann and Benjamin Huet and Loic Labrousse and {Le Pourhiet}, Laetitia",

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AU - Jolivet, Laurent

AU - Menant, Armel

AU - Sternai, Pietro

AU - Rabillard, Aurélien

AU - Arbaret, Laurent

AU - Augier, Romain

AU - Laurent, Valentin

AU - Beaudoin, Alexandre

AU - Grasemann, Bernhard

AU - Huet, Benjamin

AU - Labrousse, Loic

AU - Le Pourhiet, Laetitia

PY - 2015/9/30

Y1 - 2015/9/30

N2 - In this paper we explore the geology of the Aegean region in the Miocene to identify the geological signature of a first-order slab tear observed in all tomographic models. From 15 to 8. Ma, the tear is associated, spatially and timely, with a fast clockwise rotation of the External Hellenides, alkaline volcanism, high-temperature metamorphic domes with a predominance of north-dipping detachments, and south-westward migration of granitoid intrusions. These features suggest a warmer geodynamic environment during the rotation and the impact of a hot mantle flow associated with the tear. The ~. 8. Ma duration between the first high-temperature metamorphic domes in the centre of the archipelago and the beginning of the fast rotation may correspond to the time needed for the slab to bend, stretch and finally tear.

AB - In this paper we explore the geology of the Aegean region in the Miocene to identify the geological signature of a first-order slab tear observed in all tomographic models. From 15 to 8. Ma, the tear is associated, spatially and timely, with a fast clockwise rotation of the External Hellenides, alkaline volcanism, high-temperature metamorphic domes with a predominance of north-dipping detachments, and south-westward migration of granitoid intrusions. These features suggest a warmer geodynamic environment during the rotation and the impact of a hot mantle flow associated with the tear. The ~. 8. Ma duration between the first high-temperature metamorphic domes in the centre of the archipelago and the beginning of the fast rotation may correspond to the time needed for the slab to bend, stretch and finally tear.

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KW - BACK-ARC EXTENSION

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KW - CYCLADIC DETACHMENT SYSTEM

KW - Detachments

KW - GEODYNAMIC EVOLUTION

KW - HIGH-PRESSURE METAMORPHISM

KW - MENDERES MASSIF

KW - METAMORPHIC CORE COMPLEX

KW - Mediterranean

KW - Metamorphic core complexes

KW - NAXOS CYCLADES

KW - STRUCTURAL EVOLUTION

KW - Slab tear

KW - TECTONIC EVOLUTION

KW - WESTERN TURKEY

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DO - 10.1016/j.tecto.2015.08.004

M3 - Article

SN - 0040-1951

VL - 659

SP - 166

EP - 182

JO - Tectonophysics

JF - Tectonophysics

ER -

The geological signature of a slab tear below the Aegean

Abstract

Austrian Fields of Science 2012

Keywords

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