Abstract: Phabon gold deposit in Laos is located in the extension part of the southern Sanjiang metallogenic belt in Yunnan Province,which is an important concetrated area of iron,copper and gold deposits.Five gold orebodies have been found in this area,and the host rocks are mainly composed of Permian marine carbonate rocks.The ore-control structures include fractures of NNE ductile shear zone and NNW secondary structure.Carbonatization is the main alteration and it can be classified into three types according to their occurrences: alteration-type,structural fracture zone-type and gold-bearing carbonate vein-type.Inclusion gold and fissure gold occurr in the calcites and pyrites and their fissures.Based on the investigation in the field,it is concluded that this deposit belongs to structural meso-epithermal hydrothermal type gold deposit,and some prospecting indicators from strata,structures and alteration aspects are proposed,which have an reference significance for Au prospecting in Sanjiang metallogenic belt in China.