Writers : Nankali, H. R.; Vosoughi, B.; Soboutie, F.; Hessami, K.; Talebian, M.
Refference : Scientific Quarterly Journal Geosciences, No. 73, Page:165-176
Publishing Year : 1388

Abstract :

Athree-dimensional lithosphere model with horizontal dimensions of 1500 kmx600 km and a depth extent of 70 km for the Zagros is constructed from available geophysical data to find out strength of the outermost layers in this area. The structural boundaries of the model are based on the results from the deep seismic sounding profıles. First the finite element model for the temperature is solved in order to obtain initial temperature andthe geotherm, after that structural viscoelastic problem is solved using the same mesh as in the thermal initial condition. Preliminary results forvvetanddry rheology indicate that the depth of the BDT is about 8 km and 11 km for hot geotherm and 10.5 km tol4 km for cold geotherm. The results are in good agreement with focal depth in the Zagros that most earthquakes occur in 8 to 15 km depth (Tatar et al., 2004 and Jackson et al., 2008), that the long-term strength of the continental lithosphere resided only in its upper part, which was contained vvholly within the crust.

Subject List : Long Term Strength of Lithosphere