<p>This study investigates the pre- to syn-mineralization rupture styles of ore-controlling faults in Jiaodong gold province to address the controls of structural geometry on gold localization.&#xa0;Using 2D finite element models in ANSYS Workbench,&#xa0;we numerically simulated the&#xa0;fracture formation and evolution of the Sanshandao and Jiaojia Fault Zones,&#xa0;which host&#xa0;over 3000 tons of gold.&#xa0;They were categorized into two segments based on dip angle: 15°–20° and 30°–50°. During pre-mineralization compression setting, the low-angle (15°–20°) segments exhibited higher differential stress of 81.4–132&#xa0;MPa and shear rupture rate of 0.6–1.8 compared with the moderate-angle (30°–50°) segments. The stress vector diagram indicated that both the maximum (<i>σ</i>₁) and minimum (<i>σ</i>₃) principal stresses were compressive (<i>σ</i>₁, <i>σ</i>₃ &gt; 0), forming exclusively compressional-shear fractures. During gold mineralization under extension condition, fluid pressure reduced the effective <i>σ</i>₁ and <i>σ</i>₃. In the low-angle fault segments, differential directional reactivation generated new tensional-shear fractures, which intersected pre-existing compressional-shear fractures at acute angles to form an extensive fracture network. In contrast, the moderate-angle segments exhibited preferential reactivation of pre-existing fractures, with compressional-shear fractures expanding along previous fault planes. Consequently, the low-angle segments developed optimal fluid permeability networks and ore-hosting spaces favorable for gold mineralization, whereas the moderate-angle segments show poor permeability perpendicular to the fault and primarily served as fluid migration channels rather than favorable gold deposition sites. This study provides a quantitative evaluation for the formation and evolution of fractures and their controls on favorable localization of gold orebodies in Jiaodong.</p>