DIFFERENTIAL DEFORMATION AND METAMORPHISM IN ULTRAMAFIC BODIES OF THE BLUE RIDGE MOUNTAINS, NC
While the late stages of ultramafic block emplacement involve disruption of material in a melange-style deformational setting, these units must have behaved differently at depth and may record in their microstructure the deformational conditions of the earlier stages. Detailed study and mapping of internal structure and microstructure of these bodies will provide valuable data on the earliest stages of continental collision and ophiolite emplacement. Preliminary recrystallized grainsize studies reflect paleostress differences of at least 7 MPa. The degree of retrograde metamorphism appears to increase toward the northeast, though this can also vary between bodies in the same vicinity.