In situ viscosity measurements of albite melt under high pressure

被引：26
|
作者：
Funakoshi, K
Suzuki, A
Terasaki, H
机构：
[1] Tohoku Univ, Fac Sci, Inst Mineral Petrol & Econ Geol, Sendai, Miyagi 9808578, Japan
[2] Univ Tsukuba, Inst Geosci, Tsukuba, Ibaraki 3058571, Japan
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2002年 / 14卷 / 44期
关键词：
D O I：
10.1088/0953-8984/14/44/479
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The viscosities of albite (NaAlSi3O8) melt under high pressures have been measured using an x-ray radiography falling sphere method with synchrotron radiation. This method has enabled us to determine the precise sinking velocity directly. Recent experiments of albite melt showed the presence of a viscosity minimum around 5 GPa (Poe et al 1997 Science 276 1245, Mori et al 2000 Earth Planet. Sci. Lett. 175 87). We present the results for albite melt up to 5.2 GPa at 1600 and 1700degreesC. The viscosity minimum is clearly observed to be around 4.5 GPa, and it might be explained not by the change of the compression mechanism in albite melt but by change of the phase itself.
引用
收藏
页码：11343 / 11347
页数：5
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