Abstract

Imaging of structures associated with compressional tectonics has always been a challenge not only to the seismic data acquisition geophysicist but also to data processor and interpreter. This is primarily because of disturbances created not only in the subsurface but also on the surface and near surface due to folding, faulting, block rotation, wrenching etc associated with fold belt tectonics. Rokhia Anticline situated in Tripura fold belt area of Assam Arakan Basin is one such structure which was formed due to compressional tectonic activity. Attempts were made to image the structure using Gravity, Magnetic and 2D and 3D seismic data over a long time. However, due to near surface and surface complexities, the anticlinal part of structure could not be mapped clearly. Subsequent to acquisition of 3D data in different phases and merging and reprocessing of the same has brought out the structural aspects in greater detail