Fig. 3: Microstructures of two representative space-weathered ilmenite rims.
From: Widespread ilmenite contributions to the surface water cycle in lunar Procellarum KREEP Terrane
a Bright-field transmission electron microscopy (BF-TEM) image of the focused ion beam (FIB) section extracted from the ilmenite grain S404-09. b High-angle annular dark-field (HAADF) image of the region indicated in (a). c High magnification HAADF image of the region indicated in (b). d The corresponding energy-dispersive X-ray spectroscopy (EDS) map of Ti and Fe as shown in (c). e EELS spectra of the three regions indicated in (c). f BF-TEM image of the ilmenite grain S404-21. g The helium bubble observed in space-weathered rims in a bright-field TEM image. h HAADF image of the region marked in (f). i EELS spectra of the three regions indicated in (h).
