Abstract:

Caixiashan hydrothermal Pb-Zn deposit is located at the south margin of Hazakstan-Jungar plate. The study of the primary geochemical halos of No.36 section in No.Ⅱ ore body shows that: 1)Cd, Hg, Zn, As, Cu are front elements. Ag, Pb, Sb are proximal elements while Sn, Mo W are tail elements of the ore body. 2)The axial zonation of the elements delineated by zonation indexes is as follows:  Zn-Mo-Hg-Cd-Cu-As-Ag-Sb-Sn-W-Pb. Multivariable statistical methods such as correlation analysis, cluster analysis and factor analysis were used to study the relationship among the ore0forming elements, associated elements and major elements and the corresponding evaluation criteria such as (Cd+Hg)/(W+Mo), F₁ factor，Fe₂O₃,Na₂O, and Na₂O/K₂O were built. The distribution of the criteria shows that the mineralization is prospective in the deep portion of  the ore body under study.

Key words: Caixiashan deposit, zonation of primary halso, zonation index, prediction for deep-seated mineralization