Abstract

Experimental data on impact vaporization of serpentinite are presented. The experiment was carried out using a two-stage light gas gun with an impact velocity ∼6 km/s. Copper with a mass up to 0.5 g was used as the projectile. Impact-generated vapor in the form of a condensate film was analyzed using a JSM-5610 scanning electron microscope. The analysis showed that the Mg/Si ratio in the condensate decreased sharply (by ∼1.8 times) compared to the initial ratio in the serpentinite target. Thus, it is shown that the evaporation of the impact melt of the silicate target is selective: the vapor is enriched with relatively volatile SiO₂, leaving a relatively nonvolatile MgO in the residual melt.

中文翻译：

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蛇纹石冲击汽化的实验研究

摘要

给出了蛇纹石冲击汽化的实验数据。实验是使用两段式轻气枪进行的，其撞击速度为〜6 km / s。质量高达0.5 g的铜用作弹丸。使用JSM-5610扫描电子显微镜分析了凝结膜形式的冲击产生的蒸汽。分析表明，与蛇纹石靶中的初始比率相比，凝析物中的Mg / Si比急剧下降（约1.8倍）。因此，表明硅酸盐靶的冲击熔体的蒸发是选择性的：蒸气中富含相对挥发性的SiO ₂，在残留熔体中留下相对非挥发性的MgO。