关键词: 华北板块, 太古界, 土壤地球化学, 因子分析, 趋势面分析, 成矿靶区

Abstract: The Yu'erya gold deposit is located at the northern margin of the North China Plate.The basement of the mining area is the granulite facies and amphibolite facies of the Qianxi Group in the Archean strata.The ore body is controlled by the NNENE fault structure and the orebearing surrounding rock is granite.Based on the geological characteristics of the deposit,using the soil geochemical data of the mining area,the traditional statistical method and cumulative frequency method were used to delineate the anomalous range of 12 elements in the gold deposit.The factor analysis method was used to distinguish the SbHgPbAs element combination and Au Ag Bi.Element combination,ZnCuSn element combination and WMo element combination; further trend analysis of factor scores,which effectively highlights deep prospecting information and more accurately circle the oreforming target area.Combined with the geological characteristics of the study area,the combination of AuAgBi element and Sb HgPbAs element is the best geochemical marker element combination in the study area.The next step of geological work should be placed in the deep part of the ore body in the mining area and the abnormally high value in the south.At the same time,a small number of projects were arranged in the northern ore belt to trace the relationship between the mine and the Tangzhangzi Gold Mine.

Key words: North China Plate, Archean, Soil geochemistry, Factor analysis, Trend surface analysis, Metallogenic target area