Previous studies attributed the origin of metal veins penetrating graphite nodules in the Canyon Diablo IAB main group iron meteorite to condensation from vapor or melting of host metal. Abundances of 16 siderophile elements measured in kamacite within vein and host meteorite are most consistent with an origin by melting of the host metal followed by fractional crystallization of the liquid. The presence of the veins within graphite nodules may be explained by impact, as peak shock temperatures, and thus the most likely areas to undergo metal melting, are at metal-graphite interfaces. The origin of the veins is constrained by Re-Os chronometry to have occurred early (>4 Ga) in Solar System history.

中文翻译：

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Canyon Diablo石墨结核中金属脉的起源和年龄

先前的研究将穿透峡谷暗黑破坏神 IAB 主族铁陨石中石墨结核的金属脉的起源归因于蒸汽凝结或宿主金属的熔化。在脉内和宿主陨石中测量到的 16 种亲铁元素的丰度与宿主金属熔化然后液体分步结晶的起源最为一致。石墨结核中存在静脉可以通过撞击来解释，因为峰值冲击温度，因此最有可能发生金属熔化的区域位于金属-石墨界面。脉的起源受 Re-Os 计时法的限制，在太阳系历史上发生的早期（> 4 Ga）。