Synthesis of Large Bulk MgSiO3 Perovskite and (Mg,Fe)O Ferropericlase at High-Pressure and High-Temperature
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摘要: 钙钛矿相MgSiO3和镁方铁矿(Mg,Fe)O作为地球下地幔含量最丰富的候选矿物，其高温高压实验数据通常用来与地震学探测数据做对比，对限定下地幔的真实矿物学组分具有决定性的作用。但天然的钙钛矿相MgSiO3和镁方铁矿(Mg,Fe)O很难得到，给这两种矿物的高温高压实验研究工作带来不便。介绍了应用活塞圆筒（Piston-Cylinder）压机和大腔体二级压砧（Mutli-Anvil）压机高温高压合成大块钙钛矿相MgSiO3和不同Fe/Mg比的镁方铁矿(Mg,Fe)O样品的实验技术和实验方法，对所得到的样品进行了微区电子探针、拉曼光谱和X射线衍射分析。所得样品可以作为高压实验特别是冲击压缩实验的初始样品。Abstract: MgSiO3 perovskite and ferropericlase (Mg,Fe)O are generally considered as the most dominant components in the Earth's lower mantle. The experimental data of these phases at high pressures and high temperatures play a key role to constrain the composition of the Earth's lower mantle. However, high pressure experiments at lower mantle conditions, especially the shock wave experiments, are restricted since it is impossible to collect the high-phases of the samples in nature. We introduce the experimental methods to synthesize large bulk MgSiO3 perovskite and ferropericlase (Mg,Fe)O using piston-cylinder and mutli-anvil apparatuses, and the synthesized samples were analyzed by micro electronic probe, Raman spectrum, and X-Ray diffraction. This makes it possible to do shock wave experiments with the large bulk MgSiO3 perovskite and ferropericlase (Mg,Fe)O as starting materials.
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Key words:
- MgSiO3-perovskite /
- (Mg /
- Fe)O ferropericlase /
- high pressure and high temperature /
- mutli-anvil apparatus /
- synthesis
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