五台山—恒山一带金银矿床铅同位素地球化学特征

Isotope Geochemistry and Geological Meaning of Gold and Silver Polymetal Ore Deposits in Wutaishan-Hengshan Region

对五台山—恒山一带金银多金属矿床铅同位素地球化学研究表明,该区成矿物质主要来自下地壳及地幔,但太古宙绿岩型金矿铅同位素变化较大,而燕山期次火山岩型金银多金属矿床铅同位素较为集中,两期的成矿既有继承性,又有变异性。为新一轮普查找矿提供重要地质信息。

It is shown from the Isotope study that the metallogenic materials in gold and silver polymetal ore deposits in Wutaishan-Hengshan region might be derived from lower crust and mantle. There is bigger variation scope of Pb isotope composition in Archeazoic greenstone type deposites.but that in Hesozoic subvolcanic type deposite is limited in scope,that indicate the inberitress and variability of the latter to the former.This result supplied important geological informatior for new exploration.