黔西玄武岩铂、钯地球化学特征与存在状态  

Geochemical characteristics of Pt and Pd and their occurrence in basalt from western Guizhou

作　　者：来雅文[1] 陈博[2] 肖国拾[2] 常平[1] 

机构地区：[1]吉林大学地球探测科学与技术学院,长春130026 [2]吉林大学化学学院,长春130026

出　　处：《世界地质》2007年第3期304-308,共5页World Geology

基　　金：国家重点基础研究发展规划项目(G1999043212)

摘　　要：黔西玄武岩中铂族元素丰度较高,其含量变化顺序为Pt>Pd>Ru>Ir>Rh,表现为Pt、Pd富集,而Os、Ir、Ru、Rh亏损,说明在地幔熔融形成玄武岩的过程中,铂族元素已发生了明显的分异。在分析黔西玄武岩中Pt、Pd岩石载体所处的大地构造背景、含铂(族)矿床的可能类型和岩石化学特征与Pt、Pd可能存在状态的关系的基础上,研究了黔西玄武岩中Pt、Pd存在状态。结果表明,其状态分属硫化物态、金属互化物态、类质同像亲石态和吸附态,且各状态丰度值依次减少。The abundance of Platinum Group Elements （PGE） is higher in the basalt from western Guizhou, of which the order of the PGE contents is Pt〉Pd〉Ru〉 Ir〉Rh. It shows that the PGE occurred differentiation with Pt-rich but Pd-depletion obviously during processes of mantle differential fusion and forming basalt. The authors analyzed background of geotectonics for basah containing Pt and Pd in the studied area. On the basis of the type of mineral deposit containing PGE, the authors also studied occurrence of Pt and Pd. The results show that they belong to sulfide, intermetallic compound, silicate isomorphism and absorption in state, and the abundances of the states decrease in turn.

关 键 词：玄武岩 铂族元素 地球化学特征 存在状态 黔西 

分 类 号：P595[天文地球—地球化学]