Author: Tusar Dutta, Arun Kumar Arya and Koushik Biswas
Abstract - Himalayas comprise of four major tectonic divisions namely Sub-Himalaya, Lesser Himalaya, Higher Himalaya and Tethyan Himalaya (Figure 1). From South to North these divisions are marked by Himalayan Frontal Thrust (HFT), Main Boundary Thrust (MBT), Main Central Thrust (MCT) and Indus Tsangpo Suture Zone (ITSZ). A number of faults/thrusts which are not mentioned here also subdivide these major tectonic divisions. Modeling in the study is carried out by integrating all available geoscientific data. Parametric calibration is adopted by taking into account robust algorithms while preparing model. Geological sections of previous authors have been used in the model where seismic data is not available. A few available well data have been used to constrain the priori model. Restoration of geological model is carried out along two profiles in sub-Himalayas in this study. During the study it is realized that similar study is required up to ITSZ to resolve complexity of Himalayas.
