3D gravity modeling of a salt structure associated to the Trozza–Labaied lineament (Central Tunisia) constrained by seismic and borehole data

• Explaining a positive gravity anomaly in Trozza–Labaied lineament.
• Using seismic and gravity data to constrain 3D gravity model of a salt structure.
• Determine the relationship between the salt structure and the surrounding series.
• Compare the results with other models in Northern Tunisia.

Gravity and seismic are two distinctive geophysical methods which are used combined in integrated geophysical studies. The rationale behind this integration is to construct a 3D gravity model for a salt structure associated to the Trozza–Labaied major tectonic deformation.The Trozza–Labaied area witnessed the occurrence of several tectonic events during the Atlassic phase resulting in the creation of various salt structures. Interpretation of the available seismic data revealed the different lithological units forming the geologic setting. Whereas the analysis of the gravity data contributed in exposing the existence of different gravity anomalies. Thus, the integrated seismic and gravity data are fundamental in constructing a 3D gravity model. The resulting model provides an accurate image of the salt body extent and its geometry and determines its effect over the surrounding sedimentary deposits.