Obduction of Tethyan-type ophiolites-A case-study from the Thetford-Mines ophiolitic Complex, Quebec Appalachians, Canada

► U-Pb and 39Ar-40Ar geochronology of ophiolitic igneous rocks and related metamorphic rocks. ► Duration of the obduction of Tethyan-type ophiolites in the Canadian Appalachians. ► Tectonic implications for the early stages of the Taconian orogeny in the Northern Appalachians.