Evidence for an additional processed template and inferred mixing fractions for highlighted candidates. Evidence for a mixture model (natural reference + siderophile-enriched template) relative to a natural-only model shown as ﹩\mathrm{ln}{\rm{BF}}﹩ vs. ﹩{N}_{{\rm{\det }}}﹩. (a) atm. (b) acc_ss. Horizontal lines mark Bayes-factor thresholds (BF = 10 and BF = 100). Highlighted markers denote the highest-evidence records in each track. (c) For highlighted atm records, posterior median and 95% credible interval of the Ca-normalized mixing fraction α, conditional on the mixture model.