铵(氮)在岩石和矿物中地球化学行为研究进展  

DEVELOPMENT OF THE GEOCHEMICAL BEHAVIOR OF AMMONIUM (NITROGEN) IN ROCKS AND MINERALS

作　　者：谢建成[1] 杨晓勇[1] 

机构地区：[1]中国科学院壳-幔物质与环境重点实验室中国科学技术大学地球和空间科学学院,合肥230026

出　　处：《地质找矿论丛》2007年第1期1-8,共8页Contributions to Geology and Mineral Resources Research

基　　金：国家科技部973项目"多种能源矿产共存成藏(矿)机理与富集分布规律(2003CB214606)"资助成果

摘　　要：地壳中的氮大都以NH4+储存在矿物中。由于成岩时含氮有机物质的分解作用,氮广泛分布在沉积岩和低级变质岩中;在岩浆岩和变质岩中,氮主要以NH4+存在于含钾硅酸盐(长石和云母类)中;岩浆岩的δ(15N)值和氮浓度明显地不同于沉积物和变沉积岩,主要是由于有机物的缺乏。具有明显铵含量的火成岩主要是含钾矿物的深成岩。因而NH4+可以作为一个“示踪元素”而用于成矿作用等方面的研究。文章还提出了未来的研究方向。Nitrogen in earth crust, primarily as structural bound [NH4^＋ ], can substitute for K＋ in potassium-bearing silicate minerals such as muscovite, biotite, or K-feldspar and rocks. Compared to other geochemical systems （such as O, H,C, S etc. ）, nitrogen isotopic geochemistry has been rarely studied before but recently, the research of ammonium （nitrogen） isotopic geochemistry has developed rapidly. Value and concentration of δ（^15 N） in magmatic rock are quite different from those of sedimentary and meta-sedimentary rocks thus NH4^＋ can be used as a tracing element in the researches of ore-forming processes. This paper points out the future reseach direction.

关 键 词：铵(氮) 同位素 地球化学 岩石和矿物 

分 类 号：P595[天文地球—地球化学]