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西安河构造 (热液 )蚀变岩型金矿床 ,产于丹凤群及大草滩组发育的近EW向断裂破碎带内。矿床规模已达中型。矿石以低品位构造蚀变岩型为主 ,褐铁矿、黄铁矿是主要的载金矿物。围岩蚀变以硅化、褐铁矿化、黄铁矿化、绢云母化为特征。中基性火山岩、韧脆性断裂构造、中酸性岩浆侵入“三位一体”是控制矿床形成的基本条件。区内成矿条件优越 ,具有形成大型金矿的可能性 ,近EW向断裂蚀变延伸带是寻找金矿的有利地段。
The Xi’anhe (hydrothermal) altered rock type gold deposit was produced in the near-EW fracture zone developed in the Danfeng Group and the Dacantan Formation. The size of the deposit has reached a medium size. Ore is dominated by low-grade alteration rock, while limonite and pyrite are the major gold-bearing minerals. Wall rock alteration is characterized by silicification, limonite mineralization, pyrite mineralization and sericitization. Medium-base volcanic rocks, ductile-brittle faults, and acid-magmatic intrusion into the “Trinity” are the basic conditions for controlling the formation of the deposit. The ore-forming conditions are favorable in this area, with the possibility of forming large-scale gold deposits. The near EW trending fault zone is an advantageous area for gold prospecting.