Pluton-dyke relationships in a Variscan granitic complex from AMS and gravity modelling. Inception of the extensional tectonics in the South Armorican Domain (France)

► Anisotropy of magnetic susceptibility (AMS); 2D Gravity modelling; Extensional; deformation; pluton-dyke relationships; Variscan belt; Armorican Massif. ► The Carnac granitic complex is formed by the coalescence of NNE-SSW striking dykes. ► The internal granitic fabric is consistent with the WNW-ESE regional stretching. ► Its emplacement times the inception of the late-orogenic extensional deformation.