Significance of first-order faults in folding mechanically isotropic layers: Evidence from the Sudbury Basin, Canada

Structural controls on the localization of the mineralized Copper Cliff embayment and the Copper Cliff Offset dyke, Sudbury Igneous Complex, Canada

“…These structures were reactivated as oblique-slip faults and propagated in SIC rocks to accommodate post-impact deformations. The deformation style observed in the study area contrasts with this observed in the Main Mass of the SIC, where NW-SEshortening formed NE-SW-striking thrust faults that were then folded into E-W-and NE-SW-striking structures as folding of the SIC progressed (Clark and Riller, 2017). In the study area, pre-impact faults and neo-formed faults accommodated NW-SE shortening, but most kinematic markers registered local N-S shortening associated with late buckle folding of the eastern lobe of the SIC (Cowan and Schwerdtner, 1994;Santimano and Riller, 2012).…”

Thermo‐mechanical interaction of a large impact melt sheet with adjacent target rock, Sudbury impact structure, Canada

“…True thicknesses were estimated using the software ArcGIS (Esri) and are based on the assumptions that internal contacts of the Main Mass were horizontal during solidification and that postimpact tilting affected the rock units uniformly. As the Main Mass in the East Range is cut by a number of prominent normal and reverse faults that caused repetitions of the Sublayer Norite and Footwall Breccia (Clark and Riller ), the most faulted areas of the basal contact were excluded from the true thickness calculations.…”

“…As the Main Mass in the East Range is cut by a number of prominent normal and reverse faults that caused repetitions of the Sublayer Norite and Footwall Breccia (Clark and Riller 2017), the most faulted areas of the basal contact were excluded from the true thickness calculations.…”