A NEW METHOD FOR THE EXTRACTION OF SLIP DIRECTION AND TECTONIC EVOLUTION STUDY THROUGH PALEOSTRESS INVERSION

The importance of the tectonic evolution in understanding the tectonic changes of the earth's crust is irrefutable and calculating the paleostress and the present day stress through dynamic analysis of faults is necessary in this regard. Several methods based on the inversion of fault slip data (strike, dip, and slip direction) have been proposed. The required data can be obtained both through field observations and also from the focal mechanisms of earthquakes. However, in the meantime, finding a slip direction in comparison to other data is always more challenging, especially if the fault is buried and inactive. Hence, in this study, a method was developed and formulated to calculate the slip direction in these cases. This method employs a 3D modeling software and utilizes the interpreted 3D seismic data. The three-dimensional fault surface is modeled by triangulation, each triangle as a single fault plane has its own unique slip data.