Timescales of shock processes in martian meteorites

目前世界上收藏的火星陨石有55块。这些陨石是通过小行星或彗星与火星表面的高速碰撞(撞击)被抛入太空的，将岩石加速到5公里/S的速度。在撞击事件中产生的极端物理条件导致目标岩石具有独特的特征，称为冲击变质效应。我的研究重点是从冲击变质作用产生的矿物和结构中读取陨石的历史，揭示行星之间物质如何交换的重要线索。特别值得一提的是，高温和高压会导致岩石的小块熔化，称为冲击熔块。当这些熔体从高温下冷却时，矿物就会结晶。在冲击熔岩口袋中也发现了大量的火星大气，因为这种成分在撞击过程中被强迫进入岩石。

There are currently 55 Martian meteorites in the world's collection. These meteorites were ejected into space by high-velocity collisions (impacts) of asteroids or comets with the surface of Mars, accelerating rocks to velocities >5 km/s. The extreme physical conditions produced during the impact events cause unique features in the target rocks, called shock metamorphic effects. My research focuses on reading the history of the meteorites from the minerals and textures produced by shock metamorphism, revealing important clues about how material is exchanged between planets. In particular, high temperatures and pressures cause small pockets of the rock to become molten, called shock melt pockets. Minerals crystallize as these melts cool from high temperatures. Large amounts of Martian atmosphere are also found in the shock melt pockets, as this component is forced into the rock during impact.