The polymict carbonaceous breccia Aguas Zarcas: A potential analog to samples being returned by the OSIRIS‐REx and Hayabusa2 missions

On April 23, 2019, a meteorite fall occurred in Aguas Zarcas, Costa Rica. According to the Meteoritical Bulletin, Zarcas is brecciated CM2 chondrite dominated by two lithologies. Our X-ray computed tomography (XCT) results show many different In this paper, we describe petrographic and mineralogical investigation of five lithologies meteorite. The bulk oxygen isotope compositions some were also measured. breccia at all scales. From small fragments, have noted main lithologies, including (1) Met-1: metal-rich lithology; (2) Met-2: second lithology which distinct from Met-1; (3) CM with clasts petrologic subtypes; (4) C1/2 (5) C1 lithology. Met-1 new unique carbonaceous bears similarities CR groups, but both based on data. Met-2 represents type chondrite, it more similar group, albeit very high abundance metal. We between will explore possible genetic relationships. identified primary components: chondrule-poor chondrule-rich showing subtypes. other C1/2, are altered possibly related group. article, detail attempt classification each order understand origin history formation parent body.