Research On Geochemical Characteristics Of Primary Halos About Cu-Ni Sulfide Deposit In Hongshishan-Poyi,Xinjiang

The area of Hongshishan-Poyi in Xinjinag Located in the eastern tianshan orogenic belts ia an important component of the Centarl Asian giant metallogenic belt,and also the hot area for all the neighbourhood mineral development.Thia area owns complicated structures with widely distributed late Paleozoic volcanic rocks and Magnesium iron super mafic intrusive rocks. Therefore, there have developed a series of Cu-Ni sulfide deposits. In the essay, with the Copper and nickel sulfide deposits in the area of Hongshishan-Poyias the research object, we will emphatically study Primary halos geochemical analysis and features of Structure of primary halos of ore bodies on the basis of Mineralogy of ore deposits and the features of Petrography and ore deposit geology. Mainly with the way of Mathematical statistics, we will analyse and ascertain the Ore-forming indicator characteristic elements and Paragenetic association characteristics of elements. Meanwhile, we will ascertain the space distribution features of main ore-forming elements to establish ore-forming elements vertical zoning model.Correlation analysis showed that Ni-Cu what is the main ore-forming elements of Nickel deposit in Hongshishan-Poyi have important relation with Co、Bi、Ag、Au,so they can be the direct instructions characteristic elements. Meanwhile, Ni of Nickel deposit in Hongshishan has a strong correlation with Mn、Cr, while Ni of Nickel deposit in Poyi shows weak correlation.Also, the Clustering analysis and Factor analysis Illuminate the elements combination characteristic which at least show the three stages of geological processes: Factor that Ni-Cu-Bi-Ag-Au are as typical elements represents the main mineralization stage,what ore hydrothermal fluids that has high Content of S enriched to mineralization in liquation under the late magmatism. Factor With Cr-Mn for the typical elements represents that silicate melt melted away from basic-ultrabasic magma,what enriched these elements.Factor 3 and Factor 4 represent the low temperature hydrothermal activity in late mineralization.Analysis about abnormal levels of the surface showed that, Ni, Cu, Co, Cr element anomalies coincide with the ore body’s position; Bi, Ag, Au anomalies in the vicinity of the ore body; in addition, Sb, As, Pb, V is a far cry from the ore body,on sub-band of primary halo anomaly at the surface,The concentration zoning of drilling primary halo and vertical zoning sequence of drilling primary halo have identified the primary halo zoning characteristics of Cu-Ni sulphide deposits: In the vertical belt, a typical element what is the leading edge of the deposit halo is Pb, V, followed by Sb, As, or Zn,that they are all low temperature hydrothermal minerals; nearpre halo are with Bi, Au; halo of main mineralization are Cu, Ni, Co, followed by Ag, Cr;halo is possible to end with Mn.