Cavezzo—The double face of a meteorite: Mineralogy, petrography, and geochemistry of a very unusual chondrite

The Cavezzo meteorite, which fell on January 1, 2020, is the first meteorite detected and recovered by Italian PRISMA Fireball Network. Two specimens, weighing 3.12 g (specimen 1) 52.19 2), were collected 3 days after bolide was observed, thanks to an effective media campaign that encouraged involvement of local people. two specimens this have not only completely different lithological characteristics but also a geochemistry oxygen isotopic composition as well. Specimen 1 anomalous both for textural–structural features, varying seamlessly from chondritic “achondritic,” very unusual modal mineralogy—such relatively high amount olivine (63.1 vol%), plagioclase (18.2 high-Ca pyroxene (10.3 chlorapatite (2.1 vol%); unusually low content low-Ca (5.8 metal (0.1 troilite (much lesser than 0.1 vol%)—although compositional values (Fa 24.24 mol%) (Fs 20.41 appear be similar those L chondrite group. Conversely, in specimen 2, texture crystal chemistry mineralogy (low-Ca much more abundant occurrence sulfides) look like ordinary chondrite. differences between are confirmed geochemistry. isotope plots at boundary H groups (?17O‰ 3.250; ?18O‰ 4.736; ?17O‰ 0.788) whereas 2 LL fields 3.737; 4.957; 1.159). bulk shows many minor trace elements (including rare earth elements), such strong depletion siderophile chalcophile 1. then do contain fragments each other, thus preventing us classifying “double face” breccia. In detail, can considered “xenolith” structure igneous coexist without discontinuity, therefore, it represents previously unsampled portion parent body. summary, these findings support classification L5