关键词: 相关分析, 聚类分析, 组合异常

Abstract: Through the analysis on the elements geochemical data of Lawu Cu-Pb-Zn polymetallic deposit in Tibet，it is shown that the ore-forming elements are not evenly distributed in geological bodies.The correction analysis method and cluster analysis method are adopted to investigate the geochemical elements in the deposit.It is found that the nine elements such as Cu，Pb，Zn， Ag， Bi，Au，Hg，Sb，As have positively correlation with each other and the Cu-Pb-Zn-Ag-Bi combination associated with Cu-Pb-Zn mineralization.Anomaly areas of Cu-Pb-Zn-Ag-Bi are delineated through the anomaly threshold.Three superimposed abnormal areas with potential ore-prospecting are identified.The elements anomalies superimposed of Cu-Zn-Pb-Bi-Ag are significant，and the elements anomaly concentration concentrates on the No.1 anomaly area，hence，the area has potential in seeking for skarn ore deposit.According to the chemical results of soil samples in No.2 anomaly area，the element anomaly value of Pb is 3 800×10^-6，the element anomaly value of Zn is 5 000×10-6，therefore，the area has potential in searching for low-temperature hydrothermal Pb-Zn ore deposit.The No.3 area is affected by the fault reformation and the late magma intrusion，so，there is high abnormal Cu in the area and the element grade of Cu is 0.2%，therefore,the area has potential in searching for Cu ore deposit.

Key words: Correlation analysis, Cluster analysis, Combination anomaly