Figure 15.
(filled symbols) Measured water‐equivalent hydrogen and thermal neutron absorption cross section (ξ abs) at drill sites from DAN data compared to (unfilled symbols) measurements from APXS of drill tailings (ξ abs) and SAM EGA of drilled samples (H2O). DAN points represent the median likelihood value, and error bars represent the 18% and 82% percentiles. Uncertainties for SAM/APXS data are at the 1 standard deviation level, and ξ abs uncertainties on oxide abundances were only reported for the Duluth target in Thompson et al. (2020). The dynamic range of DAN‐derived ξ abs in the Jura and Pettegrove Point members are shown on the right‐hand side. Labels: RH (Rock Hall drill target), HF (Highfield drill target), ST (Stoer drill target), DU (Duluth drill target), S10 (Site 10). We note that the active DAN experiments were not performed directly over the drill sites but were within 2–3 m.