Compositional diversity of ordinary chondrites, inferred from Yamato 982717 (H4)

Abstract

Y 982717 has been classified as an anomalous H chondrite because of its very low Fa and Fs values (Fa_10.6-13.3, Fs_9.6-14.4). Refractory lithophile abundances and O-isotopic compositions are similar to those of ordinary chondrites. We conclude that Y982717 is the lowest-FeO H chondrite found to date and indicates that the H chondrites are more compositionally diverse than has been previously recognized.