摘要
花岗岩锆石中的微量元素(铪、铀、钇、钍、磷)的电子探针分析表明,这些元素在花岗岩锆石中皆以类质同象形式赋存,其中最小离子半径的铪以无序固溶体形式与锆完全相溶,而钇和磷在较低温度的条件下常常呈磷钇矿与锆不完全相溶;它们在花岗岩锆石中的地球化学行为是随着结晶环境的物理化学条件的变化而分异的,因此,对它们的分析研究可以揭示花岗岩的成因特征。
The microprobe analysis of trace elements (Hf,U,Y,Th,P) demonstrates that these elements occur in the form of isomorphic substitution in zircons from granitic rocks.Among these elements,hafnium with the most little ionic radio completely dissolves in zircons in the form of disorderly solid solution,but yttrium and the coupled phosphore incompletely sub- stitutes for zirconium and silicium at lower temperature respectively.The results show that the geochemical behaviour of these elements in zircon from granitic rocks are varied with the chan- ge of physico-chemical conditions of crystallization environments,and the investigation of these elements may be applicable to the granite petrogenesis.
出处
《地质科学》
CAS
CSCD
北大核心
1992年第2期131-140,共10页
Chinese Journal of Geology(Scientia Geologica Sinica)
关键词
锆石
微量元素
花岗岩
配分特征
Zircon
Trace elements(,U,Y,Th,P)
isomorphic substitution
granite petrogenesis
