In recent years,Guinea has become one of the hot spots for gold investment and exploration in West Africa.At present,the Siguiri Basin is the main gold mining area in Guinea.Beroko Gold Deposit is located in the northwest of the Siguiri Basin,and the stratum is composed of Paleoproterozoic Birimian metamorphic sedimentary rocks,pyroclastic rocks,volcanic rocks,and intrusive rocks;the ore bodies are mainly hosted in the subordinate ductile-brittle shear zone of the Birimian metamorphic sedimentary rocks and granodiorite,and it is closely related to quartz veins; there are mainly three types of gold mineralization:vein gold mineralization,breccia gold mineralization,and disseminated gold mineralization.The alteration types closely related to gold mineralization are silicification,pyritization,chalcopyritization and carbonation(ankeritization).The deposit is jointly controlled by the Paleoproterozoic Birimian stratum,NE,NWW,nearly NS,nearly EW trending fault structures(shear zones),and granodiorite bodies.The deposit type is classified as orogenic ＋ hydrothermal gold deposits.The deposit was formed during the Eburnean orogeny (2 060- 2 160Ma),and the ore-forming fluid has multiple sources and multiple phases.Four anomalous zones,Au-Ⅰ,Au-Ⅱ,Au-Ⅲ,and Au-Ⅳ were delineated through soil geochemical survey,which provided target areas for prospecting.