The Analysis Of The Structural Feature And The Mineralization Of Hushan Goldfield In Qixia Shandong Province

Jiaodong is China s important gold mineralization area,super-large gold dotted in the region.The Jiaodong gold deposit is related to the large scale magmatic activity triggered by the multi stage evolution of the Mesozoic mantle plume.Hushan gold deposit is located in North China platform Lu Dong shield glue North uplift zone in central south edge of Jiaolai depression between the northern jounction.Having experienced many times of tectonic movement,Hushan gold deposit has complicated geological structure,frequent magmatic activity and concentrated mineralization.This paper is based on field study with existing research achievements for reference.Through the detailed observation and analysis the of the characteristics of Hushan gold deposit's stratum,tectonic evolution?geophysical anomalies and geochemical distribution,the following results are obtained:1.The gold orebody of Hushan goldfield is hosted mainly in the Mesozoic Linglong super units Guojiadian unit coarse-grained monzogranite and Neoarchean Tan Ge Zhuang rock Mou home unit gneissic fine Austrian long granite contact zone.The deposit is strictly controlled by the contact zone construction and two kinds of lithologic contact zone.2.The stage-escarpment fracture belt and its secondary fracture are the main leading and contain the ore structure of.Migration is gold element in fault or footwall secondary NNE to secondary faults and derived nearly EW trending faults in the precipitation and enrichment.3.The gold deposit formation in Hushan goldfield and is closely related to Mesozoic Jiaodong area large-scale magmatic activity.It belongs to the product of Jiaodong Mesozoic large-scale mineralization stage.4.Mineralization alteration change along the fault zone with zonal distribution.Main alterations mineral are silication,sericitization,pyrite mineralization and silicification.Pyritization stronger,then higher the grade of gold.The spatial distribution of ore bodies volts South East obeying to of the orebody rules.5.The gold mineralization stage is divided into four:from early to late respectively is the potash feldspar quartz stage,the gold quartz pyrite stage,the gold quartz polymetallic sulfide stage and the quartz carbonate stage.6.The ore-forming materials are mainly derived from the mantle plume activity and may has late Archean Jiaodong Group plagioclase flash extraction effect of rock superimposed mineralization.Ore deposit type is post magmatic hydrothermal metasomatic altered cataclastic rock type gold deposit.The output of the ore bodies is controlled by fracture structure.