This paper considers the kinematics of oblique convergent or divergent motion with components of transpression” (Sanderson and Marchini, 1984) and “extensional flow” (Cowdd and Potts, 1983) in uniform, prismatic or sheet-like deformation zones. Unique relations are shown to exist between eigenvector displacement direction, instantaneous velocity gradient and either steady (constant stress) or constant-velocity (constant displacement rate) particle paths. In general, axes of strain, and therefore structural orientations, occupy intermediate directions between the displacement direction and the zone normal. These results provide a basis for relating relative displacements between crustal and lithospheric masses to patterns of regional ductile deformation, faulting, thickness change and strain migration developed over short period in situations such as collision zones, decollement zones, back-arc basins and subduction complexes.
|Number of pages||1|
|Publication status||Published - 1 Jun 1991|