Fig. 2: Elemental abundance ratios versus isotopic composition of moderately volatile elements in Bennu sample OREX-803015-0 compared with Ryugu and CCs.
From: The variety and origin of materials accreted by Bennu’s parent asteroid
a–c, Bulk copper (Cu) (a), zinc (Zn) (b) and potassium (K) (c) elemental abundances compared to their isotopic compositions with respect to Mg. The inverse Mg-normalized values are used to compensate for the variable (1) metal-silicate fractionation, (2) refractory inclusion abundances and (3) extent of alteration (H2O content) across the different samples. CK, Karoonda-type; CV, Vigarano-type; C ung., ungrouped CCs. Ordinary chondrites include H, L and LL types. See Methods for sources of non-Bennu data. Data are presented as mean values with 2 s.e. error bars.
