Fold origin of the NE-lobe of the Sudbury Basin, Canada: Evidence from heterogeneous fabric development in the Onaping Formation and the Sudbury Igneous Complex

Structural analysis of the Onaping Formation, a heterolithic impact melt breccia, and the Granophyre in the NE-lobe of the 1.85Ga Sudbury Igneous Complex (SIC) assist in understanding the formation of the Sudbury Basin. Previously, the lack of mesoscopic strain fabrics in the SIC, in contrast to pervasive fabrics in the Onaping Formation of the NE-lobe, led to interpretations of the shape of the NE-lobe as primary. We demonstrate that the …