robert h. purdon hbsc thesis abstract

the quetico fault is a significant regional structure forming part of the archean terrane in northwestern ontario.  the fault transects medium to high grade gneisses of variable origin for much of its strike length.  the absence of easily identifiable stratigraphic marker horizons makes it difficult to readily determine the net slip or the sense of motion or the fault.  microscopic examination of samples taken from the fault zone show a number of  structures and fabrics which permit the determination of movement sense locally.  based on the geometry of porphyroclast systems and shear banding a dextral sense of motion is indicated for the fault zone at this locality.