Geochemical Characteristics And Prospective Prognosis Based On Stream Sediment Survey Of The Xiacangjie And Cebudi In North Bayan Har In Qinhai Province

The Xiacangjie and Cebudi areas are located in the North Bayan Har orogen,which is an important precious metal mineralization belt in Qinghai Province,and is also one of the metallogenic belts with great prospecting potential in China.Based on the 1:50000 stream sediment survey on the area,the characteristics of the enrichment and dispersion of 19 elements in different geological bodies in the areas were roughly ascertained.It was pointed out that the Triassic strata were one of the important horizons to find Sb,Au and other polymetallic deposits.The survey area was divided into the north Gande fault geochemical zone and the south Gande fault geochemical zone by the Gande fault.According to the test results of each element,755 single element abnormalities and 15 integrated abnormalities were identified,including 12 B type abnormalities(3 in B2 and 9 in B3)and 3 C type abnormalities.Six comprehensive anomalies such as HS1,HS6,HS8,HS9,HS13,and HS15 have been investigated,which shows that the formation of abnormalities is mostly related to the northwest fault structure and fracture-alteration zone.Combined with the metallogenic geological conditions in the survey area,we circled two metallogenic prospects: the Pinluohuojieshan Au,Sb,Pb,Ag,Zn,W II Mineralization Prospects and the South Xiacangjie Zhihetougazai Au,Sb,Hg ?Mineralization Prospects;and three prospecting target areas: the Sanahelong Au,Sb,Pb,Zn B-class prospecting targets,the Galaciyan Au C-class prospecting targets and the Zhihetougazai Au and Hg C-class prospecting targets.