都龙锡矿区铅矿化特征及其实际意义

The Characteristics and Significance of Lead Mineralization of Dulong Tin Ore Area

都龙矿区的锡矿化与铅矿化既有成因联系,又有重要的区别,前者属岩控型高温热液矿床,后者为层控型热液矿床.田蓬组第四岩性段是形成铅矿床的主要矿源层,尽管部分铅可能来自燕山期花岗岩.铅矿化不仅具有工业意义,而且可作为寻找锡矿体的指示元素。

There are genetic connection and essential difference between tin and lead mineralization in Dulong Ore Area.The former belongs to high-temperature hydrothermal deposit controlled magma;the latter is stratabound middle to low-temperature hydrothermal deposit.The fourth fithological member of the Tianpeng Formation is the main source bed which forms lead ore deposit,though it is possible that a small portion of the lead comes from granite.Lead mineralization not only possesses industrial signifi- cance but is the guide element to find tin orebodise.