Trace Elements in Galena and Sphalerite and Their Geochemical Significance in Distinguishing the Genetic Types of Pb-Zn Ore Deposits

<正> This paper deals with the trace elements Ag,Sb,Bi in galena and Fe,Mn,Cd,Se,Te,■a and In insphalerite from 60 Pb-Zn deposits in China and other countries.The contents of the selected trace elementsand their ratios show regular variations from one type of Pb-Zn deposits to another.These elements or theirratios are plotted onto Pb-lnAg,lnSb-lnBi,lnGa-lnIn,Fe-Cd,Fe-Cd-Mn and Zn/Cd-Se/Te-Ga/Indiagrams.On the basis of these diagrams,the deposits associated with magmatism(type Ⅰ),those associatedwith volcanism(type Ⅱ),the sedimentary-reformed deposits(type Ⅲ)and sedimentary-metamorphicdeposits(type Ⅳ)can be well distinguished.Types Ⅰ and Ⅲ have the definite fields in all the diagrams.Types Ⅱ and Ⅳ also have their own fields in lnGa-lnIn and Zn/Cd-Se/Te-Ga/In diagrams.The authorconsiders that these diagrams are applicable to distinguishing the genetic types of Pb-Zn deposits.