Geochemistry And Mineralilization Characteristics Of Silver Lead-zinc Polymetalic In Liqingdi Of Inner Mongolia

The research area is located in the northern margin of the North China platform,the eastern section of Liangcheng upfault in Tailong,Inner Mongolia,and the south side of the Linhe-Jiming-Shangyi deep fracture zone.The fracture and fold tectonics are developed in the research area.In this paper,the mineralization characteristics and tectonic evolution of silver,lead and zinc polymetallic ore in Liqingdi area of Chayouqianqi,Inner Mongolia are studied by means of petrology,rock geochemistry,chronology and tectonic geology.It is found that the silver,lead and zinc polymetallic mineralization is mainly distributed in Liqingdi area.The tectonic strike related to mineralization is NE,NW fractures and Li Qing's duplex inversion syncline.The syncline is distributed in the NE direction.The core lithology is Ar₂j¹ grayish bearing biotite plagioclase gneiss and biotite plagiogneiss and biotite monzogneiss.Through the analysis of high-precision magnetic measurements,it is found that the silver lead-zinc polymetallic mineralization in the area is related to the annular and radial fracture tectonics of the volcanic mechanism.Ore-bearing rocks are mainly marble and volcanic-subvolcanic rocks.The volcanic rocks and subvolcanic rocks are mainly distributed in Chengtangdi,which are breccia,tuff,andesite and rhyolite,which belong to calc-alkaline acid rock??<4?and are the products of late differentiation of deep magma.The main alteration types are silicification,ferromanganese mineralization,carbonization,sericite and serpentinization.The Yushuwan rock body is mainly a gnessic adamellite,which belongs to peraluminous high-k calc-alkaline rock and high-mg andesite,which was formed in the post-collision dynamic environment in Paleoproterozoic.Silver lead-zinc polymetallic mineralization belongs to medium-low-temperature hydrothermal type and is the product of orogenic environment.