Integrated analysis on gravity, 2D seismic, and well data of the Abu Tumayam Trough, Western Sirt Basin, Libya

This study used gravity data and 2D seismic data to determine subsurface structures, including fault systems and the depth of the basement.The analysis of gravity data has been conducted using a low-pass filter, total horizontal gradient (THG), and source parameter imaging (SPI) techniques.In addition, a 2D seismic line and a well data were used in the study.The results indicate that the trough was influenced by many fault trends, including NW-SE, NNW-SSE, and NS.These fault patterns are suggestive of post-rift and syn-rift events that took place within the Sirt Basin.Based on the findings of the source parameter imaging (SPI), the depth of the basement at the depocenter exhibits a range of 5000 m to 5900 m.However, this range is not well captured by 2D seismic datasets.The depocenter is characterised by a significant accumulation of sediment, spanning from the Cambro-Ordovician to Oligocene periods, which provides evidence of the basin's filling and the evolutionary processes of Abu Tumayam.