Evidence for transition from a continental forearc to a collisional pro-foreland basin in the eastern Trans-Hudson Orogen: Detrital zircon provenance analysis in the Labrador Trough, Canada

The presence of an Andean-type magmatic arc in the western part of the Core Zone terrane supports the interpretation of an eastward subduction at 1860-1830 Ma. Furthermore, a lag time between crystallization and deposition ages within the Laporte Group points to convergent and collisional settings, with a 40 Ma transition from continental forearc basin to collisional pro-foreland basin, marking the consolidation of the Columbia Supercontinent in northeastern Laurentia.