Northwest Africa 12774 — A New Basaltic/Quenched Angrite

V. H. Hoffmann, K. Wimmer, T. Mikouchi, M. Kaliwoda, R. Hochleitner, M. Funaki, M. Torii, M. Jost

51st Lunar and Planetary Science Conference (2020), Abstract #2323


“A new angrite, NWA 12774, was reported in Meteoritical Bulletin 108 [1]. The meteorite, a single stone with a weight of 454 gr, represents the 18th unpaired angrite, quite a rare group of meteorites. A very limited number of finds (20) and only one reported fall, Angra dos Reis (1869, Brasil) are known [1,2]. Four groups of angrites can be discriminated presently in terms of petrogenesis: (1) quenched-basaltic-diabasic (fine-grained), (2) plutonic-subvol-canic (coarse-grained), (3) NWA 2999 and pairs – possibly a regolith breccia and (4) NWA 8535, the first dunitic angrite (deep mantle) [1-4].”