摘要
张十八铅锌矿床位于江西彭山地区,铅锌矿床赋存震旦系硐门组地层中,区内出露有二云母碱长花岗岩与黑云母二长花岗岩组成的复式岩体。矿石铅同位素206Pb/204Pb的变化范围在16.756～17.936,平均为17.519,207Pb/204Pb的变化范围在14.809～15.620,平均为15.484。矿石铅的μ值在9.47～9.65内窄幅波动。铅同位素的Doe和Zartman的模式图解以及△α-△β-△γ图解中所显示的矿石铅特征表明,矿床铅不是单一来源的正常铅,而是混合型多来源的异常铅,主要富上地壳铅的特征,又部分具有少量深源铅的特征,并且具有造山带铅的特点,成矿作用与燕山晚期的板块作用所产生的岩浆作用关系密切。
Zhangshiba Pb-Zn deposit in Lower Sinian Dongmen Formation is located in the Pengshan region of Jiangxi Province.The Pengshan rock body consists of biotite granite and alkali granite characterized by the ratio of ()^(206)Pb/()^(204)Pb and ()^(207)Pb/()^(204)Pb of 16.756～17.936,14.809～(15.620),with an average of 17.519 and 15.484 respectively.The μ value (9.47～9.65),the pattern by Doe and Zartman and △β-△γ diagram of ore lead compositions revealed that the ore lead was the abnormal lead with complicated sources.The lead is of characteristics of the mantle lead and mainly belongs to the lead of upper crust with some deep source.Mineralizition is related to the magmatism due to plate collision in late Yanshan period.
出处
《矿物岩石》
CAS
CSCD
北大核心
2005年第2期64-69,共6页
Mineralogy and Petrology
基金
国土资源补偿费项目(2004201)
关键词
铅锌矿床
铅同位素特征
张十八
Pb-Zn deposit
lead isotope characteristic
Zhangshiba
