【摘要】 云南会泽超大型铅锌矿床由麒麟厂和矿山厂两个独立的铅锌矿床组成。利用两组同源矿物组合Rb Sr等时线方法测定了麒麟厂6号矿体的成矿时代,测定结果分别为(225 1±2 9)Ma和(225 9±3 1)Ma,根据已知的分布于该矿床北部和西南部分布的峨眉山玄武岩成岩时代为250Ma左右,有多个火山喷发旋回,显示多期次的喷发活动,认为川—滇—黔成矿区内铅锌成矿作用与峨眉山玄武岩岩浆活动存在成因联系。更多还原

【Abstract】 The Huize giant zinc-lead ore deposit comprises the Kuangshanchang deposit and the Qilinchang deposit.The age of the No. 6ore body of the Qilinchang deposit hasbeen determined by the Rb-Srisochron method for two groupsof mineral assemblage samples. The ages are 225.1 ±2.9 Maand 225.9 ±3.1 Mafor the two groupsof mineral assemblage samples, respectively. These twoages are close to the age of the Emeishan basaltin this area, which is about 250 Ma. Many research results have shown that the Emeishan basalt has manycyclothems and the magmatism may have been a long-lived event. The ages reportedhere imply that mineralization of the Huize Zn-Pb deposit may be related to the magma event of Emeishan basalt.更多还原