| Fuquan area is located in hanyuan county,sichuan province,with an area of about 2.62km2.The administrative division is under the jurisdiction of fuquan township,hanyuan county.The study area is located at the north end of kangdian earth axis in the southwest edge of the Yangtze platform,and is located in the famous sichuan and yunnan guizhou metallogenic belt,which has superior metallogenic geological conditions.Based on the summary of previous geological data in the study area,on the basis of collected from regional geological background,field geological survey data(mainly for profile in the study area,the old adit,analysis,processing,exploratory trench),the microscopic identification of indoor light,thin,adjacent regions tang lead-zinc ore deposit types and sources of ore-forming materials to explore,etc,for the ore deposit geological characteristics and genesis of the region were analyzed.Rich springs on lead-zinc mine area is located in the Yangtze massif north rim in the west and northwest in songpan-ganzi passive margin orogenic belt,with deep major fault lines,is located in the north east anling river fracture,fracture,north of jiang southern longmenshan fault zone.In addition to the regional absence of silurian to the carboniferous system,the anterior sinian to the Permian was exposed and dominated by Marine carbonate rocks.Main stratum mining area of sinian system guanyin cliff,lamp shades,Cambrian facies distribution shop temple group,the surging wave group,the correlation group,west king,wash like ChiZu temple group,the ordovician red cliff group,home opportunely,pagodas group,etc.The ore body mainly exists in the light and shadow group,and the lithology is mainly the argillaceous dolomite,grape type dolomite,laminated dolomite,banded dolomite.There are 1 bedding ore body in the mine area,3 cut layer ore bodies,and many layers are layered,like lamellar and vein output.It is controlled by the head syncline and secondary faults in the area.The ore minerals in the mining area are mainly sphalerite,galena and pyrite,and the secondary is the zinc mine,white lead ore,chalcopyrite and limonite.Gangue minerals include dolomite,quartz and calcite.Through the observation of ore minerals under microscope,the ore structure is dominated by disseminated,reticulate and porphyry.The ore structure is mainly self-shaped-semi-autoform structure,his shape granular structure,fracture structure,crumpled structure,and embedded crystal structure,and the mining area is characterized by dolomitization and silicification.Based on the nature of the ore-forming geological mineral combination and wear cut each other relations,ore structure characteristics of metallogenic period of time to the time,divided into three periods of depositional,diagenetic stage,hydrothermal stage and supergene stage,determine metallogenic successively generated sequence.By collecting adjacent regions tang pb-zn deposit isotopes,fluid inclusions and other data,contrast research springs lead-zinc ore deposit origin types,rich source of ore-forming materials,combined with the formation,tectonic condition such as analysis of ore deposit formation.Finally,the forming process of mineralization is discussed,and the source of mineral and hot brine in fuquan ore deposit is analyzed. |
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