The ore types of the Zhaokalong Fe-Cu deposit are divided into two categories: sulfide-type and oxide-type.The sulfide-type ore include siderite ore,galena-sphalerite ore and chalcopyrite ore,whereas the oxide-type ore include magnetite ore and hematite ore.The ore textures and structures indicate that the Zhaokalong deposit is of the sedimentary-exhalative mineralization type.Geochemical analyses show that the two ore types have a high As,Sb,Mn,Co and Ni content.The REE patterns reveal an enrichment of the LREE compared to the HREE.Isotopic analysis of siderite ore reveal that the δ13CPDB ranges from-2.01 t0 3.34(‰)whereas the δ180SMOW ranges from 6.96 to 18.95(‰).The fluid inclusion microthermometry results indicate that homogenization temperatures of fluid inclusions in quartz range from 131 t0 181℃,with salinity values of l.06 t0 8.04 wt%NaCl eq.The mineralizing fluid therefore belongs to the low temperature-low salinity system,with a mineralizing solution of a CO2-Ca2+(Na+,K+)-SO42-(F-,Cl-)-H2O system.The geochemical results and fluid inclusion data provide additional evidence that the Zhaokalong deposit is a sedex-type deposit that experienced two stages of mineralization.The sulfide mineralization probably occurred first,during the sedimentary exhalative process,as exhibited by the abundance of marine materials associated with the sulfide ores,indicating a higher temperature and relatively deoxidized oceanic depositional environment.After the main exhalative stage,hydrothermal activity was superimposed to the sulfide mineralization.The later stage oxide mineralization occurred in a low temperature and relatively oxidized environment,in which magmatic fluid circulation was dominant.