Pre-Cordilleran transposition signatures in felsic and intermediate composition boudins of the Thor-Odin dome, southeastern Canadian Cordillera

Davide Raffaele Addamo (a), Davide Zanoni (a), M. Iole Spalla (a,b) & Gisella Rebay (c)
(a) Dipartimento di Scienze della Terra "A. Desio", Università degli Studi di Milano, via Mangiagalli, 34, 20133 Milano, Italy. E-mail: davide.zanoni@unimi.it (b) CNR-IDPA, via Mangiagalli, 34, 20133 Milano, Italy. (c) Dipartimento di Scienze della Terra e dell'Ambiente, Università degli Studi di Pavia, via Ferrata, 1, 27100 Pavia, Italy.

Multiscale structural analysis, applied to the north-western and southern portions of the Thor-Odin dome, reveals that the tectonometamorphic evolution predating the development of the regional fabric (ST) is contrasted. Pre- ST PT-estimates range between amphibolite and granulite facies conditions: these different PTdt evolutions suggest the existence of different tectono-metamorphic units before the development of the Cordilleran transposition foliation.

HP-HT relics, Monashee complex, PTdt path