Large olivine samples were hot-pressed synthesized for shock wave experiments. The shock wave experiments were carried out at pressure range between 11 and 42 GPa. Shock data on olivine sample yielded a linear relationship between shock wave velocity D and particle velocity u described by D=3.56(0.13)+2.57(0.12)u. The shock temperature is determined by an energy relationship which is approximately 790°C at pressure 28 GPa. Due to low temperature and short experimental duration, we suggest that no phase change occurred in our sample below 30 GPa and olivine persisted well beyond its equilibrium boundary in metastable phase. The densities of metastable olivine are in agreement with the results of static compression. At the depth shallower than 410 km, the densities of metastable olivine are higher than those of the PREM model, facilitating cold slab to sink into the mantle transition zone. However, in entire mantle transition zone, the shock densities are lower than those of the PREM model, hampering cold slab to flow across the "660 km" phase boundary.
Experiments of dynamic high pressure using shock wave are very effective to study physical properties of material under super‐pressure. A shock wave experimental study on Damaping olivine with pressure from 10 to 45 GPa is reported in this paper. Combining previous works about isothermal equation of state for olivine, the temperature in experimental process is determined. The temperatures range from dozens of degrees to 800 °C when the pressures of our experiments are between 10 and 30 GPa. The density variation with pressure is obtained from our experiments and ranges from 3.627 to 4.009 g·cm−3. According to recover experiment of the sample and estimated temperatures under experimental pressures, it is derived that the phase transition during our experimental process under pressures of 30GP did not occur. Meanwhile, the parameters for equation of state are determined. Finally, the geodynamic implication of the experimental results to interior material movement in mantle is discussed, i.e. cold slab with metastable olivine is easily to sink into the mantle's transitional zone.
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