Organic matter in carbonaceous chondrite lithologies of Almahata Sitta: Incorporation of previously unsampled carbonaceous chondrite lithologies into ureilitic regolith

The Almahata Sitta (AhS) meteorite is a unique polymict ureilite. Recently, carbonaceous chondritic lithologies were identified in AhS. Organic matter (OM) ubiquitously found primitive chondrites. molecular and isotopic characteristics of this OM reflect its origin parent body processes, are particularly sensitive to heating. C1 AhS 671 91A investigated, focusing mainly on the OM. We that these contains signatures, but experienced slight heating possibly by short-term event(s). These support idea one or more bodies incorporated into ureilitic body. uniqueness samples implies there large variations materials solar system other than known chondrite groups such as CI, CM, CR