HR: 14:25h
AN: T13F-04    [Abstracts]
TI: Testing tectonic models by petrological data: numerical modeling and visualization of P-T paths
AU: * Gerya, T V
EM: taras.gerya@erdw.ethz.ch
AF: Department of Earth Sciences, Swiss Federal Institute of Technology, Zrich, Sonneggstrasse 5, Zurich, CHE CH-8092
AB: The pressure (P)-temperature (T)-time (t) path of a rock is a direct record of its movement within the Earth's interior. Thus P-T-t paths are powerful tools for understanding tectonic processes, and in the last 25 years many P-T-t paths have been worked out by petrologists for crustal and upper mantle rocks formed in different geodynamic environment. Indeed, the majority of numerical studies of tectonic processes at present do not specifically address the details of synthetic P-T-t trajectories. Thus, the huge amount of empirical data available on the P-T-t evolution of crustal and mantle rocks is at present not adequately used to check and interactively optimize numerical models of geodynamic processes. We suggest that there is a general major problem in visualizing the results of numerical geodynamic modelling in terms of the P-T-t evolution of the rocks involved. We have developed a dynamic visualisation and animation technique to allow direct interactive comparison between P-T-t paths and numerical experiments of different geodynamic situations. This cross-disciplinary approach has been applied for modeling of crustal diapirism, subduction and incipient continental collisions. Obtained results demonstrate efficient testing of numerical experiments by available petrological data.
DE: 3600 MINERALOGY AND PETROLOGY
DE: 8020 Mechanics, theory, and modeling
DE: 8104 Continental margins: convergent
DE: 8120 Dynamics of lithosphere and mantle: general (1213)
SC: Tectonophysics [T]
MN: Fall Meeting 2005