HR: 0830h
AN: NG11A-0170    [PDF]
TI: Interactive Visualization of Elastic Wave Velocity Anisotropy in Mantle Minerals
AU: * Karki, B B
EM: karki@bit.csc.lsu.edu
AF: Louisiana State University, Department of Computer Science, 298 Coates Hall, Baton Rouge, LA 70803 United States
AU: Wentzcovitch, R M
EM: wentzcov@cems.umn.edu
AF: University of Minnesota, Dept. of Chem. Eng. and Mat. Sci., 421 Washington Ave., SE, Minneapolis, MN 55455 United States
AU: Chennamsetty, R
EM: rchenn1@lsu.edu
AF: Louisiana State University, Department of Computer Science, 298 Coates Hall, Baton Rouge, LA 70803 United States
AU: Iyengar, S S
EM: iyengar@bit.csc.lsu.edu
AF: Louisiana State University, Department of Computer Science, 298 Coates Hall, Baton Rouge, LA 70803 United States
AB: A graphical user interface (GUI) is developed to visualize the elastic wave velocity anisotropy of minerals in response to pressure and temperature. The scheme involves two steps: First, the Cristoffel wave equation is solved on an adaptive three-dimensional grid of propagation directions. Second, the velocity distribution is rendered using polygon-surface and color-coding techniques. The graphical implementation is done with the standard OpenGL graphics libraries and C. This portable GUI enables interactive, three-dimensional visualization of wave velocity surfaces as a function of P and T. We have used it to analyze the anisotropic behavior of major mantle minerals, including MgO and MgSiO3-perovskite for which the required wave velocities are derived from the elastic constants predicted by first-principles calculations at relevant conditions. A demo will be done during the presentation.
DE: 3909 Elasticity and anelasticity
DE: 3924 High-pressure behavior
SC: Nonlinear Geophysics [NG]
MN: 2003 Fall Meeting