Solid Earth, 12, 1357–1388, 2021 https://doi.org/10.5194/se-12-1357-2021 © Author(s) 2021. This work is distributed under the Creative Commons Attribution 4.0 License. Interactions of plutons and detachments: a comparison of Aegean and Tyrrhenian granitoids Laurent Jolivet1, Laurent Arbaret2,3,4, Laetitia Le Pourhiet1, Florent Cheval-Garabédian2,3,4, Vincent Roche1, Aurélien Rabillard2,3,4, and Loïc Labrousse1 1Institut des Sciences de la Terre Paris, ISTeP UMR 7193, Sorbonne Université, CNRS-INSU, 75005 Paris, France 2Université d’Orléans, ISTO, UMR 7327, 45071, Orléans, France 3CNRS/INSU, ISTO, UMR 7327, 45071 Orléans, France 4BRGM, ISTO, UMR 7327, BP 36009, 45060 Orléans, France Correspondence: Laurent Jolivet (
[email protected]) Received: 2 February 2021 – Discussion started: 16 February 2021 Revised: 27 April 2021 – Accepted: 30 April 2021 – Published: 16 June 2021 Abstract. Back-arc extension superimposed on mountain 1 Introduction belts leads to distributed normal faults and shear zones inter- acting with magma emplacement within the crust. The com- position of granitic magmas emplaced at this stage often in- In the deep parts of orogens, the flow of melts is coupled volves a large component of crustal melting. The Miocene with ductile deformation and controlled by buoyancy and Aegean granitoids were emplaced in metamorphic core com- tectonic forces (Brown, 1994, 2007; Brown and Solar, 1998). plexes (MCCs) below crustal-scale low-angle normal faults Migmatites, which are a weak crustal material as long as and ductile shear zones. Intrusion processes interact with ex- they are kept at a high temperature, are the source of magma tension and shear along detachments, from the hot magmatic batches that concentrate within plutons of various sizes.