Thermal History of Asteroid Parent Bodies Is Reflected in Their Metalorganic Chemistry
Thermal History of Asteroid Parent Bodies Is Reflected in Their Metalorganic Chemistry
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DOI：
10.3847/2041-8213/ac0727
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发表时间：
2021-07-01
影响因子：
7.9
通讯作者：
Schmitt-Kopplin, Philippe
中科院分区：
文献类型：
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作者：
Matzka, Marco;Lucio, Marianna;Schmitt-Kopplin, Philippe
有机镁化合物被证明有助于显着的可溶性碳分子的复杂性和多样性的陨石，和他们的分析增加了我们的知识碳稳定/封存过程中的小行星母体。在这里，我们提出了一组新的硫镁羧酸盐检测使用超高分辨率质谱在各种陨石。这些新化合物显示出与小行星母体的热历史相关的丰度增加。通过比较44陨石经历了可变的后吸积历史的可溶性有机提取物，我们描述了不同的有机化合物模式的硫镁羧酸盐在其长期和短期的热历史。它表明，这些分子的特殊稳定性，使生存的碳在恶劣的热外星条件下，即使在玻璃化的融合地壳进入地球大气层期间形成的。硫-镁-羧酸盐增加了我们对母体程序在空间中的碳封存和物种形成的理解。
Organo-magnesium compounds were shown to contribute significantly to the soluble carbon molecular complexity and diversity of meteorites, and their analysis increases our knowledge on carbon stabilization/sequestration processes in the asteroidal parent body. Here we present a new group of sulfur-magnesium-carboxylates detected using ultra-high-resolution mass spectrometry in a variety of meteorites. These novel compounds show increased abundance correlated with the thermal history of the asteroid parent bodies. By comparing the soluble organic extracts of 44 meteorites having experienced variable post-accretion history, we describe distinct organic compound patterns of sulfur-magnesium-carboxylates in relation to their long- and short-duration thermal history. It is shown that the exceptional stability of these molecules enables survival of carbon under harsh thermal extraterrestrial conditions, even in the vitrified fusion crust formed during entry into the Earth's atmosphere. Sulfur-magnesium-carboxylates augment our understanding of parent body proceedings with regard to carbon sequestration and speciation in space.