抄録
Organic compounds in chondritic meteorites are the products of a complex history that began in dense molecular clouds and the diffuse interstellar medium. This primordial materials were subsequently modified during the formation of the protoplanetary disk, and during the formation and alteration of the meteorite parent bodies. Insoluble organic matter is a complex and heterogeneous macromolecular material that accounts for a major portion of the organic carbon in chondrites. Recent analyses of the insoluble organic matter from a range of chondrites spanning the major groups (CM, CI, CR, CV, CO, ungrouped C2, ordinary, enstatite) and petrologic types 1-3+ have revealed that the organic matter clearly records the history of chemical processing on the meteorite parent bodies. This review first introduces the chemical characteristics of the insoluble organic matter from the well-studied CM2 chondrites, and then highlights the molecular and isotopic variations of the insoluble organic matter in different meteorite groups which could be indicators of aqueous alteration and/or thermal metamorphism on the meteorite parent bodies.
