摘要
对含水黑云母(实验温度为800℃、1000℃)、角闪石(实验温度900℃)在压力0.5～2.0GPa时进行了氩扩散研究,发现含水情况下黑云母的氩扩散特性明显地不同于单纯黑云母体系,其扩散系数下降1—2个数量级,活化能有一定增大。压力对含水黑云母和角闪石的扩散和温度的作用相反。
Radiogenic Ar diffusion is measured at 800℃ and 1000℃ for water-containning biotite and at 900℃ for amphibole at 0.2～2.0 Gpa. It is found that Ar diffusion characteristics of watercontainning biotite are obviously different from those of pure biotite system and that its diffusion coefficient decreases by about 2 magnitudes while the activation energy increases slightly. Pressure effect is opposite to that of temperature for Ar diffusion in biotite and amphibole.
基金
国家自然科学基金
关键词
氩
扩散
角闪石
云母
地质年代学
Ar diffusion, high temperature and pressure, amphibole, water-contained biotite
