关键词: 原生晕　 地球化学特征　 鸡冠咀铜金矿　 成矿预测

Abstract: The Jiguanzui Cu-Au Deposit is located in the southeastern part of Hubei Province,an important Cu-Fe-AuMo mineral accumulation zone in the middle and lower reaches of the Yangtze River in China. The orebody is mainly in the form of veins and thin plates,and the deposit is controlled by the fault contact zone structure and the goose shaped fractures in the marble. It belongs to the high to medium temperature gas-liquid type copper gold deposit after the magmatic period. Taking 927 pieces of primary halo data from 8 boreholes in No. 28 exploration line profile of No. Ⅶ Cu-Au deposit in Jiguanzui as the study object,factor analysis,correlation analysis,and cluster analysis were used to study the degree of element affinity in the deposit. The Grigoryan zoning index method was adopted to determine the axial zoning sequence of the primary halo,and combined with the abnormal characteristics of the primary halo and the geochemical parameters of the primary halo,mineralization prediction was made for the hidden ore body in the deep edge of No. Ⅶ deposit. Research has shown that:① There is a strong correlation between Au,Cu,Co,W,and Mo,and Au,Cu,Ag,Zn,and Pb are the most direct indicator elements for mineralization. ② The axial zoning sequence of the primary halo of the ore body is As-Sb-W-Co-Au-Ag-Ni-Pb-Zn. The leading edge halos As and Sb coexist with the trailing edge halos W and Mo,and the trailing edge element Ni appears in the upper part of the near ore indicator elements Pb and Zn. The indicator orebody is formed by the superposition of multiple phases,and there is a possibility for the orebody to extend towards the two side boundaries in the axial direction. ③ The ratio of elements in the leading edge halo and tail halo reflected by w(Sb) / w(W) and w(As+Sb) / w(W+Ni) are relatively large at the boundary and shows an increasing trend,indicating the possibility of the orebody extending along the axial direction to both sides. Based on comprehensive analysis,it is believed that there are still mineralization conditions and trends on both sides of the section of No. Ⅶ orebody on No. 28 line of Jiguanzui,and further engineering verification is necessary. 

Key words: primary halo,geochemistry,Jiguanzui Cu-Au skarn deposit,metallogenic prediction