Equation of state for silicate melts: A comparison between static and shock compression
Equation of state for silicate melts: A comparison between static and shock compression
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DOI：
10.1002/2013gl058328
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发表时间：
2014-01
影响因子：
5.2
通讯作者：
D. Wakabayashi;Nobumasa Funamori;Tomoko Sato;T. Sekine
中科院分区：
文献类型：
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作者：
D. Wakabayashi;Nobumasa Funamori;Tomoko Sato;T. Sekine
在地球深部上地幔压力条件下，对静态和冲击压缩下硅酸盐熔体的密度数据进行了定量比较。基于静态压缩数据的状态方程不能解释冲击压缩数据，揭示了它们之间的系统性差异。不同文献采用不同的方法估算了冲击温度，所报道的冲击温度值相差很大。通过假设熔体中类似相变的结构变化估计的冲击温度介于先前的估计之间。其中许多远低于每个样品的液相线温度，这表明样品状态可能在冲击压缩过程中发生了改变。此外，在最近的论文中重新分析的一些冲击压缩数据与原始数据有很大的不同。这些结果表明，硅酸盐熔体在高压下表现出类似相变的结构变化，这与静态压缩数据一致。
The density data of silicate melts reported by static and shock compression have been compared quantitatively at the pressure condition of the Earth's deep upper mantle. The equation of state based on the static compression data cannot explain the shock compression data, and the systematic differences between them have been revealed. The shock temperatures were estimated with different methods among papers, and the reported values differed considerably from one another. The shock temperatures estimated by assuming phase‐transition‐like structural changes in melts lie between the previous estimates. Many of them are well below the liquidus temperatures of each sample, suggesting that the sample state may have been altered during the shock compression. In addition, some of the shock compression data reanalyzed in the recent paper differ considerably from the original. These results suggest that silicate melts show phase‐transition‐like structural changes at high pressures, which are consistent with the static compression data.