Nanoscale graphene morphologies are reported in the Allende and QUE 94366 CV3-type carbonaceous chondrites via Confocal Raman Imaging Spectroscopy. These morphologies are found embedded in the refractory calcium-aluminum-rich inclusion (CAI) rims in Allende and within a chondrule inclusion in QUE 94366. Earlier investigation already revealed graphite whiskers (GWs) presence in both these meteorites. Further inspection of the meteoritic sections, coupled with advancements in the knowledge of carbon materials, reveal a re-interpretation of Raman features of a subset of the reported GWs and newer analyzed features as graphene. This meteoritic graphene perhaps originated from the same protosolar carbon reservoir that synthesized the GWs. The graphene was most likely synthesized concurrent to the inclusions and CAIs, in a high-temperature zone near the proto-Sun and during the solar system's earliest eon. However, in the case of Allende we cannot totally rule out synthesis during later aqueous alteration of the original mineral CAI assemblage.

通过共焦拉曼成像光谱在阿连德和 QUE 94366 CV3 型碳质球粒陨石中报道了纳米级石墨烯形态。在阿连德的难熔富钙铝包裹体 (CAI) 边缘和 QUE 94366 的球粒包裹体中发现了这些形态。早期的调查已经揭示了这两种陨石中都存在石墨晶须 (GW)。对陨石截面的进一步检查，加上碳材料知识的进步，揭示了对所报告的 GW 子集的拉曼特征和更新的分析特征为石墨烯的重新解释。这种陨石石墨烯可能起源于合成 GW 的同一个原太阳碳储层。石墨烯很可能与包裹体和 CAI 同时合成，在原太阳附近的高温区和太阳系最早的亿万年期间。然而，在阿连德的情况下，我们不能完全排除在原始矿物 CAI 组合的后期水蚀变过程中的合成。