Abstract: The Jiagantan gold deposit in Gansu Province is located in the western part of the Qinling orogenic belt,which is a newly discovered gold deposit with super-large prospecting potential in the southern part of Xiahe-Hezuo gold mineralized belt.Taking the Jiagantan super-large gold deposit as the study example,based on the detailed field geological investigation and comprehensive study results,the mineralization enrichment regularity and ore-controlling factors of the deposit are analyzed.The study results show that:①the thickness variation regularity of the deposit show that the ore-bodies thickness of the western part is obviously larger than that of the eastern part of the mining area;②the elements distribution contours indicated that the concentration regions of high grade value are mainly distributed in the area of 3#~0# exploration line,which is the precipitation concentration area of the metallogenic materials in the mining area;from the west to the east of mining area,the overall grade reflects the evolution characteristics from high to low,which indicated that the metallogenic materials is migrated from the west to the east of mining area;③the overall mineralization enrichement regularity show that the mineralization intensity of the west is greater than the one of the east of the mining area,the existing of low-lying in the central mining area,it is resulted by the ore-bodies are destructed by the existence of faults.Through the analysis of the ore-controlling factors,the results show that the factors of formation,structure and alteration are closely related to the formation of the gold deposit in the mining area,among them,structure is the most important one of the ore-controlling factors.Combing with the analysis of mineralization regularity and ore-controlling factors of the deposit and the newly drilling results of the mining area,the further discussion results show that prospecting potential of the depth of the western part and its periphery of the mining area are huge,and the further prospecting work should be focused on these areas.

Key words: Gold deposit, Mineralization enrichment regularity, Grade variation regularity, Prospecting potential