It was also indicated by the studies on a large number of pb isotope that pb in ores of the deposit chiefly came from volcanic rocks in the strata and later intrusions with derivation of a little pb from the normal deposit stratum 大量pb同位素研究也表明，矿床的矿石铅源跨越了下地壳、地幔和造山带演化线，形成混合铅带，多集中于地幔和造山带演化线附近，暗示pb主要来自地层中的火山岩和后期的侵入岩，少量来自正常沉积地层。
