1-s2.0-S0012821X17300353-gr007.sml

Fig. 7. CI chondrite normalized abundances of S, Se, Te, Cu and highly siderophile elements in the mantles of Mars and Earth (this study; Becker et al., 2006, Lodders, 2003, Taylor, 2013, Wang and Becker, 2013). The Martian mantle is strongly depleted in Te, which yields a maximum value for the contribution of Te from metal–silicate partitioning during core formation. This value also indicates late accretion of a strongly volatile element-depleted late veneer on Mars. In contrast, Cu, S and Se in the Martian mantle are primarily left over from metal–silicate segregation. Among chondrites, H chondrites (a) have the lowest Te/Ir and Te/Se ratios (Wasson and Kallemeyn, 1988). The pattern b) represents an alternative composition of volatile element-depleted late accreted material with ratios of volatile elements similar to CI chondrites. (For interpretation of the references to color in this figure, the reader is referred to the web version of this article.)