Évènements tectoniques d'origine compressive dans le Protérozoïque du nord de la Cordillère canadienne (montagnes Ogilvie, Yukon)

Abstract

The oldest Proterozoic strata of Coal Creek Dome (Ogilvie Mountains, Yukon) have been affected by syntectonic and decimetre- to kilometre-scale folds. These folds were eroded, then sealed by other Proterozoic strata. This is the first record of a Proterozoic compressive tectonic event in the northern Canadian Cordillera. It is named the Fifteenmile orogeny and may be correlated either with the Wernecke Mountains Racklan orogeny (usually dated at about 1200 Ma) or with an older event, perhaps Hudsonian (1750 Ma).