Numerical Modeling of the Development of Kink-bands in Anisotropic Rocks

Thursday, March 21, 2002 - 2:30pm - 3:00pm
Keller 3-180
Dazhi Jiang (University of Maryland)
One effective way to constrain the rheology of rocks under natural conditions is to examine structures in rocks. Kink-bands are common structures in well-foliated rocks and anisotropic crystals. We have used anisotropic plastic rheology to numerically model the development of kink-bands. It is shown that as the bulk strength and the degree of anisotropy vary, a variety of deformation mechanisms occur. By examining the geometry of kink-bands in rocks, one can constrain the region in the bulk strength- anisotropy space, the deformation has occurred.