The Metamorphism And Deformation Of The Neoproterozoic Zhaertai Group And Theirs Control On The Ore Re-emplacement Of Huogeqi Copper-zinc Polymetallic Deposit,Inner Mongolia

The Huogeqi copper-zinc polymetallic deposit is located in Langshan-Baiyunebo rift system occurred in western part of northern margin of North China Block,The north side of sauron suture zone;It links with the wester marginal thrust system of the Ordos Basin to the south.Thus,the Alashan Block to the west,It Connects with the Yinshan-Yanshan tectonic belt to the east.The regional stratigraphic is Archean erathem ural mountains Group and the Neoproterozoic Zhaertai Group,the Magmatic of the area Mainly includes Hercynian Intermediate Acidity Rock,The lithology is mainly for the granite and granodiorite.East to the north of Large scalefracture structure to give priority to the area,secondary small fractures also developed.We Choose Huogeqi copper-zinc polymetallic deposit as the research object,Thekey study of The metamorphism and deformation of the Neoproterozoic Zhaertai Group and The concentration and dilution of sulfide in ore,through the field observations and laboratory analysis we divide the ore field into three parts:northern,central and southern belt.Through analysis from outcrop to microscopic scales,and quartz c-axis fabrics,we consider the Neoproterozoic rocks in the Huogeqi ore field experienced multi-phase deformation and metamorphism.Two phases of deformation contribute to the different structural characteristics in northern,central and southern belts.The first phase of deformation is characterized by NW-SE shearing at deformation temperature at about 600 ?.The second phase of deformation is evidenced by NE-SW shearing at ralatively low temperatures.ResearchonThespatialdistributionof orebodymain basis on a three-dimensional model of ore bodies which employed Surpac software and other date,such as drill holes profilgs of exploration lines geological plan of various levels,Looking at the results from the study analysis,the Orebody existsEnrich parter and Partially depleted,From the horizontal section to expose situation,From north to southof of Pb-zinc-Fe-Cu zoning show certain extent of distribution and zoning inside the orefield,the NE-trending regional of orebody in Vertical zoning from Cu?Fe?Pb?Zn in According to the order distribution,The eastern branch of orebody is obvious in Branch composite,enrichment and desperation is developed in all the area of the mine.the effects of Regional metamorphism and deformation on sulfide ore deposit,mainly in Ore texture and structure and mineral chemistry structure,Regional Metamorphism is Strong developed Through the study of the Ore texture and structure in Huogeqi copper-zinc polymetallic deposit.But their primary texture are reserved well,The results of detailed field and microscopic studies on the deposit show that the stratiform orebodies underwent extensive structural reformation and that the distinct deformed behaviours from different sulfides gave rise to the complex style with both brittle and plastic deformed fabrics.Microscopic features of the deformed sulfides indicate that the orebodies were transformed by the multi-phase deformation.Enrichment and depletion of the orebody may result from the physical remobilization caused by the shearing.