Fig. 4
From: Long-term weathering rate of stained-glass windows using H and O isotopes
a–c D/H NanoSIMS mappings of the OU2 sample exposed 2.75 months at 70% RH and d–f are the corresponding overlay by image processing on the SEM-BSE images. a, d are located at the pristine glass interface. b, c, e, and f are located in the middle of the alteration layer, with D penetration inside the isolated islets of low-altered glass. g, h are the overlays by image processing of the D/H mappings on the associated SEM-BSE images of two zones of the OU2 sample exposed for 14 months at 90% RH. In all these images, the green zones and rims correspond to the local highly D enriched areas with the D penetration inside the pristine glass. PG, pristine glass; AG, altered glass. It should be noted that the grayish edges in front of the enrichments in the pristine glass (images d, h especially) do not correspond to the hydrated zone, but to artifacts of the image processing. These edges are not present on the initial SEM images
