Geochemical Characteristics Of Primary Halos And Prediction Of Deep Ore Prospecting In The Hatu Gold Deposit

The Hatu Gold Mine is the largest gold deposit in the Xinjiang in terms of mine size and output.With the continuous development and utilization of mine resources and the increase of geological work,it is more and more difficult to rely on surface macroscopic markers for direct exploration.The primary halo prospecting method is a method for prospecting using geochemical element anomalies that are preserved in ore bodies or ore bodies in the process of diagenesis and mineralization,and has developed into an important means of exploration geochemical prospecting,especially It has obvious effects for finding hydrothermal concealed deposits.In this study,145 samples were taken from the ore body and surrounding rock in the middle section of the mid-eastern pit exploration project in Hatu mining area,19 deep core core samples in the central and eastern parts,and 54 drill core samples in the southwest.According to the relevant information of the mining area,the geological characteristics of the deposit,and the common(companion)relationship of the elements,12 kinds of metal elements such as Ag,As,Au,Bi,Cu,Hg,Mo,Ni,Pb,Sb,W and Zn were selected for testing.Under the guidance of the theory,comprehensive exploration of geochemical,ore deposits and mining-related data will be used to combine the twelfth ore-forming elements of the eastern concealed veins and the southwestern veins.Characteristics,anomalous distribution characteristics and native sag zoning characteristics and related geochemical parameters are combined to assess and predict the occurrence of deep blind ore bodies.The exploration of geochemical primary halo method was used to predict the potential of deep mineralization of Hatu,mainly using the standard of gold deposit superimposed halo to determine concealed ore.The following results were obtained:(1)Comprehensively determine the front halo Hg,As,Sb,near-mineral elements Zn,Ag,Pb,Cu,Mo,and tail halo W,Bi,Ni.(2)After calculating the primary halo axial banding column in the eastern part of the figure:Au,Pb-Hg-As,Ag-W-Sb,Bi-Zn,Cu,Ni,Mo.The southwest is :Bi,Zn,Hg-Pb-Sb-Cu-W,As-Ag,Ni-Mo-Au.(3)The upper part of the middle part of the belt sequence is the ore-forming element Au,which belongs to the result that the ore body has been denuded;the middle and deep parts are the front edge halo and the tail halo;the tail is the combination of the near-mineral element and the tail halo element.It shows that the main ore body is showing a downward trend,and it is less likely to find a new ore body down.The combination of tail halo and near mineral elements appears in the upper part of the axially partitioned sequence in the southwestern part of the mining area.The combination of near mineral elements and leading edge halo elements appears in the deep part of the sequence;(4)Comparing the distribution characteristics of the primary halo in the deep ore body in the central and eastern parts of the mining area,it is found that although the frontal halo element Hg is abnormal at the bottom of the central part,the scale intensity is small,and it is concluded that there is a scale of blind ore body or Less likely.In the west of 800 m high,it shows the combination of the combination of the frontal halo element and the tail halo element.The maximum multiplication of geochemical parameters appears at a height of 600 m,so the possibility of deep burial is greater.(5)Based on the analysis of the characteristics of the primary halo and the axial zoning sequence and related geochemical parameters,it is concluded that there may be an extension of the upper vein in the central and eastern regions,and the probability of the presence of new veins is small.However,in the southwest,the leading edge halo is abnormal and the main ore-forming elements are strong,indicating that there may be a blind ore in the deep or the ore body extending downward.(6)Based on all the researches in this time,it is inferred that the potential of the central and eastern parts of the mining area is less than that of the southwest,so the deep exploration work of the mining area should be transferred to the southwest.