Soil Geochemical Characteristics And Mineralization Prediction Of Xunyu Tungsten-manganese-lead-zinc Mining Area In Luoning County, Henan Province

The tungsten manganese plumbum zinc mine,Xunyu,Luoning County,Henan is located in the southern margin of North China continental block,the middle section of Huaxiong Tailong,and the important metallogenic belt of gold,silver,molybdenum,tungsten,lead-zinc and other polymetallic deposits in western Henan Province.The stratigraphic units are mainly acidic volcanic rocks and neutral lava of Majiahe formation,sandstones of Dayu formation,Quaternary loess,and alluvial deposits of the Xiong'er Group of the Middle Proterozoic.Paleoproterozoic metamorphic granite and the ancient volcanic activity of Xiong'er Group provided the material source for the formation of polymetallic ore,and the multi-stage tectonic-magmatic thermal event provided the condition for mineralization.Through collecting the basic geological data of Xunyu area,the soil geochemical survey of 1:10000 and soil profile of 1:2000 were carried out in the mining area.The soil sample was intercepted by-20?100 mesh grain-size,and 12 trace elements were analyzed,and the ore-prospecting indication elements were determined.Besides,the geochemical anomaly limit of trace elements in this area is determined by comparing the traditional method and fractal method in geochemical data processing.But the traditional method ignores some weak or excessively high abnormal values in low background values,and it is extremely easy to lose the abnormality;The fractal method can further delineate the concentration center of elements,which is conducive to the rapid and effective exploration.But it is easy to omit the ore-induced anomalies formed from concealed deposits.Apply the traditional mathematical geology method such as factor analysis to study the symbiotic combination rule of each element and determine the combination anomaly of the main metallogenic elements.And there are 13 synthetic anomalies in the study area.In addition,an evaluation about the anomalies of Shenshuwa 12-A1 tungsten and manganese polymetallic comprehensive anomaly,and Xunyu north slope 8-A2 lead-zinc polymetallic comprehensive anomaly of key geochemistry was made on in the study area.And there is potential for discovery of lead polymetallic and tungsten polymetallic deposits(point)beds.On the basis of geological characteristics and mineral distribution law,the prospect of ore prospecting is discussed.According to the significance of prospecting,it is screened and divided into 7 ore prospecting and prediction areas.Among them,there are 2 ore prospecting and prediction areas of grade I,3 of grade II and 2 of grade III.