Abstract

This study employs three high-resolution 2D seismic reflection profiles to investigate the Andaman Nicobar Fault (ANF) and its influence on the evolution of a volcano-supported basin situated adjacent to Narcondam Island. Migrated seismic images reveal a fluid-saturated zone, identified through comprehensive velocity and polarity analyses. Within this zone, mean 1/Q values range from 0.0165 to 0.0096 across the three survey lines. Furthermore, polygonal faults are discerned within the seismic data. These faults, dated to the Miocene epoch, exhibit varying thicknesses between 0.1 and 0.4 km and are observed overlying the fluid-saturated zone. The migrated sections provide evidence that the ANF branches act as conduits for fluid migration and accumulation within the basin sedimentary deposits.