In this study, we performed three-dimensional gravity modeling and inversion of the Vinton Dome, a well-known onshore salt structure located in southwestern Louisiana, USA, by simultaneously integrating Full Tensor Gravity (FTG) and conventional gravity data using a simulated-annealing approach. The process begins with the application of Tensor Euler Deconvolution (ETD), which provides a physically consistent initial model for inversion. This method extends the traditional Euler deconvolution by incorporating both the three diagonal components of the gravity-gradient tensor and the three components of the gravity field, thereby enhancing the frequency content and stability of the solutions. By combining FTG gradients and gravity data, the proposed workflow improves the precision of subsurface modeling, particularly in delineating salt-body boundaries and estimating their depth. The integration of ETD-derived initialization with joint inversion results in a more accurate reconstruction of density contrasts, offering a powerful approach for characterizing complex geologic structures such as the Vinton Dome.