EARLY PROTEROZOIC DEFORMATION ALONG THE SOUTHERN MARGIN OF THE KISSEYNEW GNEISS BELT, TRANS-HUDSON OROGEN - A 30 MA PROGRESSIVE DEFORMATIONCYCLE

Fold axes and lineations across the southern margin of the Kisseynew g neiss belt were progressively reoriented from northwesterly to northea sterly during an Early Proterozoic, southwest-directed, compressive de formation cycle. Partitioning of deformation resulted in a concentrati on of non-coaxial strain along the boundary between the Kisseynew gnei ss belt and Flin Flon - Snow Lake belt. The structural evolution was c omplicated by streamlining of the movement vector around the comparati vely rigid Flin Flon - Snow Lake belt. The relationship of metamorphic assemblages to kinematic fabrics indicates that deformation was coeva l with a prograde-retrograde metamorphic cycle. Progressive deformatio n occurred during a period of 30 Ma, which is consistent with Phaneroz oic orogenic time scales.