关键词: 金多金属矿床, 土壤地球化学特征, 元素异常组合, 异常下限, 找矿预测

Abstract: Through conducting the soil geochemical survey work in a scale of 1∶10 000 in Donggou gold-polymetallic deposit area，the statistical characteristics of the survey data is firstly analyzed，and then，the survey data is conducted on correlation analysis，cluster analysis and factor analysis based on Spass software so as to obtain the element anomaly combination in the mining area; Finally，the Spass software is adopted to make the box plot of each element so as to determine the anomaly thresholds of each element by obtaining the first quartile and third quartile.The research results show that:①the elements such as Au，Ag，Hg，As，Sb，Bi，Ba，Pb，Zn and W have a certain tendency of secondary enrichment because its contents are higher than other elements relatively，and its coefficients of variation are larger than that of other elements;②the elements such as Ag，Pb，Zn，Mo，Au，Hg，Ba and W elements represent the secondary enrichment combination of the main ore-forming elements;③it is obvious that the high abnormal elements distribute in the central or the eastern part of the mining area and within the tectonic fracture zone by determining the abnormal threshold and selecting the elements′ anomalies.The above results can provide some reference for the ore-prospecting work in the mining area.

Key words: Gold-polymetallic deposit, Soil geochemical characteristics, Element anomaly combination, Anomaly threshold, Ore-prospecting