INFLUENCE OF LAYERING AND BOUNDARY-CONDITIONS ON FAULT-BEND AND FAULT-PROPAGATION FOLDING Academic Article uri icon

abstract

  • The influence of heterogeneous layering and boundary conditions on the structural development of fault-bend and fault-propagation folds has been investigated through petrographic study of nonscaled rock models. The models are deformed in a triaxial rock-deformation apparatus at room temperature and a 50-MPa confining pressure. The models consist of a single layer of sandstone containing a saw-cut ramp that is inclined 20 to the layering, and an overlying, intact, thinly layered unit that is composed of limestone interlayered with lead or mica. Analysis of the fold-thrust structures generated in sequentially shortened models with different loading conditions and layer types suggests that the mode of fold-thrust interaction activated upon shortening will depend on fault zone drag, bending and shearing resistance of the hanging wall, shear strength of layer interfaces, and loading conditions. -from Authors

published proceedings

  • GEOLOGICAL SOCIETY OF AMERICA BULLETIN

author list (cited authors)

  • CHESTER, J. S., LOGAN, J. M., & SPANG, J. H.

citation count

  • 71

complete list of authors

  • CHESTER, JS||LOGAN, JM||SPANG, JH

publication date

  • August 1991