Study on Element Migration Features in Alteration Zone of Beizhan Iron Deposit in the Western Tianshan Mountains

Awulale Iron iron metallogenic belt is one of the most important iron-rich area,which is located in the Western Tianshan Mountains,and extensive previous research and study had been made about Beizhan iron deposit,especially on the mineralization chronology,metallogenic model and so on. However, the features and quantitative study of element migration of the deposit is still scarce, and the element migration in the process of hydrothermal alteration is unclear. This study is focusing on elucidating the element migration patterns of the Beizhan iron deposit by mass-balance calculation method, this requires systematic fieldwork about wall rock-alteration zone-ore body,and analyzing the whole rock geochemistry of the samples by normalized Isocon diagram and element migration rate.The results indicate that the Beizhan deposit shows obvious element migration during the ore-forming process,especially the mass gain betweent wall rock and alteration rock, Fe2O3 and FeO are enriched and siderophile element such as MnO,Ni,Cr,V show positive correlation,besides large ion lithophile element such as K2O,Rb,Ba,Cs are depleted,and Zr,Hf,Li,Be,Ta are relatively stable.The observed features of element migration of the Beizhan iron deposit provide valuable insights for exploration of iron deposits around the metallogenic belt.