Figure 13.

Logarithmic plots of (a) germanium and (b) iridium versus nickel content for bulk compositions of all iron meteorites. The ‘non-magmatic’ iron groups (IAB, IIICD and IIE) are shown in dark gray. IVB irons are shown as black circles or a black shaded region and IVA irons are shown as a gray shaded region or gray circles in the plots and these samples are plotted in Figure 13. Other shading is used to distinguish iron meteorite groups and unfilled circles are ungrouped iron meteorites. Dashed lines denote the CI-chondrite ratios. Data are reported in Walker et al. (2008), Goldstein et al. (2009), McCoy et al. (2011) and references therein.