在铁帽上进行铅同位素测量,是勘探“层控”Pb-Zn-Cu矿床的一种手段.此法基于层控矿体的均匀同位素成分,基于其比率与所谓的“生长曲线”密切的拟合.这二者也是表征原生硫化矿氧化露头(铁帽)的标志.对于由已知矿导生的真铁帽,经过检验证明,在氧化作用过程中保留均匀的Pb同位素比率.在这些已知矿中,从铁帽到原生硫化矿的垂向深 Lead isotope measurements on iron caps are a means of prospecting “stratigraphic” Pb-Zn-Cu deposits based on the homogenous isotopic composition of stratabound orebodies based on their ratios to the so-called “growth curve ”Close fitting, both of which are also indicative of native sulphide oxidized outcrops (iron caps) For true iron caps derived from known mines, it has been shown through testing that uniform Pb isotopes are retained during the oxidation process In these known mines, the vertical depth from the iron cap to the native sulphide ore is deep