DUCTILE SHEAR BANDS IN A NATURALLY DEFORMED QUARTZITE.

Abstract

MICROSCALE SHEAR BANDS ARE FEATURES THAT OFTEN OCCUR OBLIQUE TO THE MYLONITIC FOLIATION IN MYLONITES. THIS PAPER IS CONCERNED WITH SUCH STRUCTURES WITHIN A QUARTZ-MYLONITE. GEOMETRICAL FEATURES, MICROSTRUCTURES AND FABRICS ASSOCIATED WITH SHEAR BANDS ARE DESCRIBED. BOTH OPTICAL AND TRANSMISSION ELECTRON MICROSCOPY HAVE BEEN USED.