Characteristics Of Primary Halo And Ore Prospecting Based On Nayongzhi Lead-zinc Deposit,Northwest Guizhou

The primary halo prospecting method since 1950s was proposed,through the practice and application of many domestic workers and scholars in different geological minerals an d various types of ore deposits.It has been accepted by domestic and international geoche mistry researchers,which is considered to be a mature and effective method for the predic tion of hydrothermal ore deposits.Nayongzhi of the Sichuan Yunnan Guizhou lead-zinc deposit is located in the southea st side of metallogenic domain,the southern margin of the central Guizhou Uplift,Diando ng uplift on the west side,in recent years in Guizhou province Wuzhishan ore district an d found not only a large lead-zinc deposit evaluation,but also is a part of the Wuzhishan lead-zinc ore District,ore district along Five Fingers Group anticline developed 7 axis s mall-large lead-zinc deposit,and ore control has proven more than 20,of which Nayong zhi deposit is lead-zinc deposit ore district reserves are the largest typical deposit.Through a detailed catalog of Nayongzhi deposit No.4 exploration line and 1270 mi ddle and sampling,adoptting zoning sequence research,statistical analysis,the composition of primary halo equivalence method,system of Nayongzhi deposit No.V-1 orebody of p rimary halo zoning characteristics,the main contents include the following three aspects:i ndicating the composition and strength of the primary elements in the halo;the distributio n range,each with size and shape;zoning and set the components,is established on the b asis of deep ore prospecting model,evaluates the ore bearing deep area.Research resualts show that using Grigorian zoning index calculation,Nayongzhi lead-zinc deposit V-1 oreb ody zoning sequence was Zn-Cd-Hg-Pb-Mo-Co-Sn-Cu-As-Sb-Mn;the primary halo in the s pace extension,front halo halo halo was near the mine tail,front halo elements into Zn-P b-Cd-Hg;near ore halo element assemblage is Cu-Ni-Sn-Co-Mo;the tail halo the element assemblage is Ag-Sb-Mn;the strength variation of indicator elements in the space of the halo,from the shallow to deep within the range increases and the shallow orebody halo h as a certain degree of coincidence within the regular change;the form of indicator elemen ts in the space distribution of halo with approximate parallel ore zoning characteristics,an d the volcano hydrothermal type Pb Zn deposit zoning-exist-obvious differences;through multivariate statistical analysis of the halo forming elements,that the indicator elements zo ning,The genesis of control elements in composite halo elements and minerals has great r elevance;the result study of the factor analysis showed that this deposit metallogenic temp erature should be low temperature,characteristics and sources of the mineral is deep;and through the distribution of factor scores in space,show that the ore-forming elements the difference between precipitation and fluid distribution in the migration process is obvious i n the process of mineralization.