The Winchcombe meteorite, a unique and pristine witness from the outer solar system.
The Winchcombe meteorite, a unique and pristine witness from the outer solar system.
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DOI：
10.1126/sciadv.abq3925
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发表时间：
2022-11-18
期刊：
影响因子：
13.6
通讯作者：
中科院分区：
文献类型：
--
作者：
在太阳系中，碳质陨石和它们的母体之间的直接联系是罕见的。温奇康贝陨石是最准确记录的碳质球粒陨石坠落。它的前大气层轨道和宇宙射线暴露年龄证实它在从原始小行星喷出后不久到达地球。坠落后仅几小时就被发现，温奇康贝陨石的成分基本上没有受到地球环境的影响。它含有丰富的水化硅酸盐在流体岩石反应过程中形成，和含碳和含氮的有机物质，包括可溶性蛋白质氨基酸。温奇康贝陨石接近原始的氢同位素组成与地球水圈相当，进一步证明富含挥发物的碳质小行星在地球水的起源中发挥了重要作用。对来自小行星的陨石的快速分析揭示了早期太阳系中挥发物的原始组成。
Direct links between carbonaceous chondrites and their parent bodies in the solar system are rare. The Winchcombe meteorite is the most accurately recorded carbonaceous chondrite fall. Its pre-atmospheric orbit and cosmic-ray exposure age confirm that it arrived on Earth shortly after ejection from a primitive asteroid. Recovered only hours after falling, the composition of the Winchcombe meteorite is largely unmodified by the terrestrial environment. It contains abundant hydrated silicates formed during fluid-rock reactions, and carbon- and nitrogen-bearing organic matter including soluble protein amino acids. The near-pristine hydrogen isotopic composition of the Winchcombe meteorite is comparable to the terrestrial hydrosphere, providing further evidence that volatile-rich carbonaceous asteroids played an important role in the origin of Earth’s water. Rapid analysis of a meteorite from an asteroid reveals the primitive composition of volatiles in the early Solar System.
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影响因子：
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