Abstract The composition of atmospheres and the resulting potential for planetary habitability in the rocky bodies of our Solar System and beyond is strongly controlled by the volatile exchange between their silicate reservoirs and exospheres. The initial budget and speciation of major volatiles, like carbon (C), nitrogen (N) and water (H2O), in the silicate reservoirs and atmospheres was set during the formation stages of rocky bodies. However, the speciation of these major volatiles in reduced silicate melts prevalent during the differentiation stages of rocky bodies and its effect on the partitioning of volatiles between major rocky body reservoirs is poorly known. Here we present SIMS and vibrational spectroscopy (FTIR and Raman) data, determining C solubility, H content, and speciation of mixed C-O-N-H volatiles in graphite saturated silicate glasses from high P (1–7 GPa)-T (1500–2200 °C) experiments reported in Grewal et al., 2019a , Grewal et al., 2019b . The experiments recorded oxygen fugacity (log fO2) between IW–4.3 and IW–0.8. C-O-N-H speciation varied systematically as function of fO2 at any given P-T. We find out that C-N−, C O 3 2 - , N2, and OH− are the dominant species in the oxidized range (>IW–1.5), along with some contributions from C-H, N-H, and C-O bearing species. Between IW–3.0 and IW–1.5, C is bonded as C-O either in the form of isolated C-O molecules or Fe-carbonyl complexes, or as C-H in hydrocarbons, or as combination of both in esters, while almost all of the H is bonded with the dominant N species, i.e., NH2− or N H 2 - . At the most reduced conditions ( D N alloy/silicate is unaffected by fH2 under highly reduced conditions ( D C alloy/silicate is affected. Therefore, caution must be taken during the application of experimentally determined D N alloy/silicate and D C alloy/silicate to nominally anhydrous MOs.

中文翻译：

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岩浆海洋中碳、氮和水的形态及其对太阳系岩体主要储层间挥发性分配的影响

摘要 大气的组成以及由此产生的太阳系及其他岩石体中行星宜居性的潜力，受到它们的硅酸盐储层和外逸层之间的挥发性交换的强​​烈控制。硅酸盐储集层和大气中主要挥发物，如碳 (C)、氮 (N) 和水 (H2O) 的初始预算和形态是在岩体形成阶段设定的。然而，在岩体分化阶段普遍存在的还原硅酸盐熔体中这些主要挥发物的形态及其对主要岩体储层之间挥发物分配的影响知之甚少。在这里，我们提供 SIMS 和振动光谱（FTIR 和拉曼）数据，确定 C 溶解度、H 含量、Grewal 等人，2019a 和 Grewal 等人，2019b 报道的高 P (1-7 GPa)-T (1500-2200 °C) 实验中石墨饱和硅酸盐玻璃中混合 CONH 挥发物的形态形成。实验记录了 IW–4.3 和 IW–0.8 之间的氧逸度 (log fO2)。在任何给定的 PT，CONH 物种形成系统地随 fO2 的变化而变化。我们发现 CN−、CO 3 2 - 、N2 和 OH− 是氧化范围 (>IW–1.5) 中的主要物种，同时还有一些来自 CH、NH 和 CO 的物种。在 IW–3.0 和 IW–1.5 之间，C 以孤立的 CO 分子或 Fe-羰基复合物的形式结合为 CO，或以烃中的 CH 或酯中两者的组合形式键合，而几乎所有的 H 都键合与主要的 N 物种，即 NH2- 或 NH 2 - 。