Variability of Organic Matter Across Ci Chondrites and Ryugu

Petrologic and isotopic analysis of the mineral components of regolith samples from asteroid 162173 Ryugu collected by the JAXA Hayabusa2 spacecraft indicate a strong affinity with CI chondrite meteorites. Preliminary investigations of organic matter in Hayabusa2 samples also report similarities with insoluble organic matter in CI and CM chondrites. However, the Ryugu samples also contain a wide diversity of organic functional chemistry not previously observed in those aqueously altered chondrites. Due to their rarity, organic matter in CI chondrites is understudied relative to other chondrite classes. Here we investigate several CI samples with the same analytical approaches used for samples collected by Hayabusa2 for a more accurate comparison between CI and Ryugu organic matter.