Abstract: The hydrothermal gold,uranium,arsenic and antimony deposits in the Bailongjiang anticlinorium of the western Qinling orogen are controlled by fault structures and closely related to magmatism and sub-volcanism in the Mesozoic.Two sets of en echelon arranged arc structures occur respectively at both ends of the Bailongjiang anticlinorium,controlling two highly mineralized areas (HMA) in the south-western Qinling.The Dashui-type gold deposits with gold-bearing jasperoid ores (an oxidation type),and the Lar'erma-type Au-U-Cu deposits with gold and uranium siliceous mudstone ores enriched in organic carbon (a reduction type) in the Maqu-Ruo'ergai Au-U(Cu) HMA in the west,are controlled by the Dashui arc structure and the Langmusi arc structure respectively.The Manaoke-type As-Au deposits,Xiaojinchang-type Fe-Cu-Au deposits,and the Xinguan-type hydrothermal gold deposits in the Zhouqu-Wenxian Au(Cu) HMA in the east,are controlled by the Wudu arc stucture and Wenxian arc structure respectively.As the major ore-control structures,the subsidiary fractures at the apices of the arcs have exerted some important effect on the formation of the two huge gold deposits,the Dashui super-large gold deposit and the Xinguan Lianhecun large gold deposit,as well as on the hypabyssal alkaline intermediate-acid magmatic and continental volcanic rocks which are genetically associated with the mineralization of the gold and uranium deposits.