Abstract: The Berx Uul Gold Deposit is a newly discovered epithermal gold deposit in the southwestern part of the North Khentei gold metallogenic belt. The orebodies are hosted in gabbro and controlled by nearly NS-trending faults, with lenticularor vein-shaped occurrences of gold-bearing quartz veins and altered rock-type orebodies. By systemati-cally analyzing the geochemical characteristies of the gabbro (host rock) in the Berx Uul Gold Deposit and comparing them with those of typical gold deposits in the North Khentei gold metallogenic belt (e.g., Boroo, Naren Tolgoi gold deposits),this study explores metallogenie patterns and prospecting potential. Results from major elements, rare earth elements, and trace elements indicate that the gabbro is enriched in Mg, Fe, and Ca, with a weak negative Eu anomaly, signifi-cantly differing from gold deposits hosted in intermediate-acid rocks within the North Khentei gold metallogenic belt. The mineralization of the Berx Uul Gold Deposit is associated with Late Triassic magmatic hydrothermal activity. This study proposes that mafic rock distribution areas and the vicinity of placer gold clusters in the southwestern part of the North Khentei gold metallogenic belt are potential target areas for rock gold exploration, with a focus on fractures within mafic rock masses and contact zones.