EELS fine structure of features in SSW rims. (a) Overlaid Fe (magenta) and Ti (blue) concentration maps (see Section 2.2.3) of the 5 hr sample in the same region as Figure 3(a). The dark inclusions in Figure 3(a) are shown in green. (b) EELS low-loss spectra averaged over the color-coded regions in (a). The dashed line indicates a characteristic ∼10.5 eV peak. (c) Ti L-edge ELNES spectrum averaged over the Ti-rich (blue) region in (a). (d) Fe L-edge ELNES spectrum averaged over the Fe-rich (magenta) region in (a). All spectra are plotted alongside that from unexposed ilmenite (black). (e)–(h) Same as (a)–(d), but for the 12 hr sample.