Geology of the Mount Novit Ranges, southwest of Mount Isa mine

Southwest of Mount Isa Mine, deformation has resulted in a succession of fold/cleavage generations, ductile faults, and shear zones which reflect continued east-west to northeast-southwest shortening in the Proterozoic Mount Isa Inlier. Kinematic indicators and stratigraphic/metamorphic relations across the faults demonstrate west-over-east movement throughout this history. Pre-D fabrics remain enigmatic, and are recognised ony on the microscale. The dominant fabric and fold generation developed during D, synchronously with low pressure-high temperature metamorphism. Peak conditions reached upper amphibolite facies, and peak temperatures outlasted D, acccompanied by continued folding, as the low pressure-high temperature metamorphic event began to wane. Early shear zone fabrics (S) are overprinted by mesoscopic asymmetrical non-cylindrical F folds. -from Authors