Earth, Atmosphere & Environment Sciences
Title : | Long-Term Stress Field Perturbation and Stress Modeling Along the Myanmar-Andaman-Sumatra Subduction Margin |
Area of research : | Earth, Atmosphere & Environment Sciences |
Focus area : | Geophysics, Tectonics |
Principal Investigator : | Prof. Prosanta Kumar Khan, Indian Institute Of Technology (Indian School Of Mines) Dhanbad, Jharkhand |
Timeline Start Year : | 2024 |
Timeline End Year : | 2027 |
Contact info : | khanprosanta1966@iitism.ac.in |
Equipments : | Desktop and Peripherals
FEM Software Upgradation |
Details
Executive Summary : | The study focuses on the Myanmar-Andaman-Sumatra subduction margin, which is a transitional domain between the zones of frontal subduction of the Indo-Australian plate beneath the northeast Himalaya and the Java arc in its south. The oblique convergence of the Indian plate against the Asian plate along this margin causes trench-parallel shear, which is accommodated by various faults on the overriding Asian plate. These observations demonstrate a complex tectonic regime prevalent over the area. The study emerges from previous studies conducted over the last two decades, which have analyzed the ambient long-term stress regime and its perturbation under both pre-earthquake and post-earthquake phases of the off-Sumatra mega-event of December 2004. The high-resolution structure of both the lithosphere and their mutual interaction in different sectors between the Myanmar and Andaman remains to be delineated, and the long-term stress perturbations need to be assessed.
A dataset for stress inversion using the Matlab code will be compiled from the USGS catalog for both converging plates. Three computed principal stress parameters and the shape ratio (R) will highlight the overall tectonics of the study region. Finite element stress modeling of the converging lithosphere will also be carried out for the entire margin. This study will lead to the development of a high-resolution 3-D geodynamic model involving the spatial variation of deformation of the subducting Indian lithosphere with concurrent deformation of the overriding topography. |
Total Budget (INR): | 27,00,240 |
Organizations involved