Interrelations between extensional shear zones and synkinematic intrusions: The example of Ikaria Island (NE Cyclades, Greece)

Valentin Laurent 1, * Alexandre Beaudoin 1 Laurent Jolivet 1 Laurent Arbaret 1 Romain Augier 1 Aurélien Rabillard 1 Armel Menant 1
* Corresponding author
1 ISTO - Institut des Sciences de la Terre d'Orléans - UMR7327
Abstract : The Aegean extensional backarc domain is an ideal place to investigate the interrelations between syntectonic intrusions and large-scale detachments, understanding whether the intrusions have a triggering effect on the inception of metamorphic core complex formation or not. A new field study of Ikaria Island (NE Cyclades, Greece) in two Miocene granitoid plutons intruding a high-temperature metamorphic dome, namely the Raches and Karkinagrion granites, leads to the identification of a major structure that has been omitted in previous studies: the Gialiskari Detachment. This regional-scale detachment is correlated with the North Cycladic Detachment System. Structural fieldwork at the scale of the entire Raches and Karkinagrion intrusions allows us to propose a map of strain intensity in these granites.
Keywords : detachment metamorphic core complexes intrusions Ikaria Island Aegean Backarc extension
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Valentin Laurent, Alexandre Beaudoin, Laurent Jolivet, Laurent Arbaret, Romain Augier, et al.. Interrelations between extensional shear zones and synkinematic intrusions: The example of Ikaria Island (NE Cyclades, Greece). Tectonophysics, Elsevier, 2015, 651-652, pp.152-171. ⟨10.1016/j.tecto.2015.03.020⟩. ⟨insu-01145425⟩

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