In intermediate-acid magmatic rocks,alkaline magmatic rocks,gneisses and migmatitic rocks K-feldspar is a rook-forming rock in which the contents of Pb are highest,just 2-10 times those of the whole rock,3-16 times those of mica minerals and 6-32 times those of quartz.The lowest contents of K-feldspar are recognized in Early Proterozoic and Achaean rocks,with Pb in the K-feldspar accounting for less than 10% of that in the whole rock;in post-Middle Proterozoic alkaline magmatic rocks,K-feldspar-rich granites and metamorphic rocks the contents of K-feldspar tend to increase,with the proportion of Pb over that in the whole rock being obviously increased.In the alkaline rocks in which K-feldspar accounts for 50%-70%of the total in the whole rock,the contents of Pb in K-feldspar account approximately for 70%-95% of the total lead in the whole rock.Being accessible to hydrothermal alteration in the late periods,K-feldspar was conversed to sericite,calcite,quartz,etc.In the process of such conversion the lead would be leached out and then find its way into fluid phase.This kind of trans-formation can provide sufficent ore-forming material for later Pb metallogenesis. In intermediate-acid magmatic rocks, alkaline magmatic rocks, gneisses and migmatitic rocks K-feldspar is a rook-forming rock in which the contents of Pb are highest, just 2-10 times those of the whole rock, 3-16 times those of mica minerals and 6-32 times those of quartz. The lowest contents of K-feldspar are recognized in Early Proterozoic and Achaean rocks, with Pb in the K-feldspar accounting for less than 10% of that in the whole rock; in post- Middle Proterozoic alkaline magmatic rocks, K-feldspar-rich granites and metamorphic rocks the contents of K-feldspar tend to increase, with the proportion of Pb over that in the whole rock are an increased prone. In the alkaline rocks in which K-feldspar accounts for 50% -70% of the total in the whole rock, the contents of Pb in K-feldspar account for for 70% -95% of the total lead in the whole rock.Being accessible to hydrothermal alteration in the late periods, K -feldspar was conversed to sericite, calcite, quartz, etc. In the process of such c onversion the lead would be leached out and then find its way into fluid phase. This kind of trans-formation can provide sufficent ore-forming material for later Pb metallogenesis.