<span>This study employs numerical simulations based on the Limit Analysis (LA) method to calculate the stress distribution in a </span><span>kilometric</span><span>-scale model developed over a basal detachment, featuring the lateral termination of a generic fault under compression. We conduct 2500 </span><span>2D</span><span> and 500 </span><span>3D</span><span> simulations, varying basement and fault friction angles, to analyze and classify the results into clusters representing similar failure patterns to understand the stress fields. Automatic fault detection methods are employed to identify the number and positions of fault lines in </span><span>2D</span><span> and fault surfaces in </span><span>3D</span><span>. Clustering approaches are utilized to group the models based on the detected failure patterns. For the </span><span>2D</span><span> models, the analysis reveals three primary clusters and five transitional ones, qualitatively consistent with the critical Coulomb wedge theory and the influence of inherited structural and geometric aspects over rupture localization. In the </span><span>3D</span><span> models, four different clusters portray the lateral prolongation of the inherited fault. High stress magnitudes are detected between the </span><span>compressive</span><span> boundary and the activated or created faults, and at the root of the inherited active fault. Tension zones appear near the outcropping surface relief while stress decreases with depth at the </span><span>footwall</span><span> of the created back-thrusts. A statistical, cluster-based stress field analysis indicates that for a given cluster, the stress field mainly conserves the same orientations, while the magnitude varies with changes in friction angles and </span><span>compressive</span><span> field intensity, except in failure zones where variations are sparse. Small parametric variations could lead to significantly different stress fields, while larger deviations might result in similar configurations. The comparison between </span><span>2D</span><span> and </span><span>3D</span><span> models shows the importance of lateral stresses and their influence on rupture patterns, distinguishing between </span><span>3D</span><span> analysis and </span><span>2D</span><span> cross-sections. Lastly, despite using small-scale models, stress field variations over a span of a couple of kilometers are quite large.</span>