Geological Characteristics And Deep Prospecting Of The Keyue Pb-Zn-Sb Polymetallic Deposit In Longzi County, South Tibet

Keyueue Pb-Zn-Sb polymetallic deposit is located in the STDS, is a deposit closed to the Zhaxikang deposit. In this paper, taking Keyue Pb-Zn-Sb polymetallic deposit which is located in the Longzi county south Tibet as the research object, through the research on the field geological investigation and indoor data processing, generally understand its geological characteristics. And on this basis, the primary halo prospecting theory and method to study the metallogenic elements and indicator elements within the mining area. The study includes the zoning sequence of elements, element assemblage characteristics, anomalous element relation with mineralization etc.. Based on the above work, the author conducted a preliminary metallogenic prediction of Keyue mining area, established the primary halo tectonic metallogenic model, we draw the following conclusions:on the basis of the modified C.B. Grigorian method can be as follows:zoning sequence (top-down), Mo-Ni-Au-Bi-As-Hg-Pb-Ag-W-In-Cu-Ba-Ga-Zn-Sb. Front Keyue mineralization indicating elements are Hg, Ba, Sb, As; Keyue deposit ore near indicating elements are Pb, Cu, Ag, Zn, Au; metallogenic Keyue lead antimony polymetallic deposit tail halo indicating elements are W, In, Mo, Bi, Ga, Ni. Also reflects the characteristics of Keyue lead antimony polymetallic deposit multistage mineralization. Variation characteristics of geochemical parameters of axial showed a deep blind ore bodies occur. The clustering analysis of the indicator elements based on Pb, Zn, Sb, As, Ni, Ba, classified as a class level correlation is0.77, on behalf of the metallogenic elements; Au, Ag, Mo, Bi, In are classified as a type of correlation coefficient is0.45, while the Au, Mo, Bi, In as a kind of correlation coefficient reached0.52. Factor analysis and cluster analysis and zoning sequence:the first factor, basic agreement between As, Sb, Pb, Zn, Ba, Ni, represents the main ore-forming elements combination; second factor, Ag, Au, Bi, In, Mo, Bi, In, Mo represents high temperature elements, i.e. the rear halo elements combined, Ag, Au as the front stack element next mineralization stage; third factor, Ag, Hg, Ga, W, Ag, Hg represents the low temperature elements, namely the front elements. Finally, on the basis of As*Hg*Ba/Ga*W*Bi multiplicative halo as calculated denudation extent of orebodies. The calculation results show that from the top down,4516m in middle, middle4468m, middle4403m multiplicative increase, decrease, than increased, suggesting that the No.1ore body at the front near the tail is likely to be another blind ore body.