Mineralogical Magazine; April 2004; v. 68; no. 2;
p. 369-394; DOI: 10.1180/0026461046820193
© Mineralogical Society of Great Britain and Ireland
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FIG. 5. Peripheral crusts and alterations of ilmenite and chromite. (a) ENSM-6774. Altered chromite (dark grey with convoluted cracks) bearing a fine layer of ‘irite’. Pol. sect. SEM(BS). 260 µm. (b) MNHN. Altered ilmenite (various shades of dark grey) bearing a thick layer of ‘irite’ (spotted white). Pol. sect. SEM(BS). 140 µm. (c) ENSM. Chromite (dark grey with orthogonal cracks; Table 2, col. 1) rimmed with a lighter border. Pol. sect. SEM(BS). 160 µm. (d) ENSM. Enlargement of Fig. 5c, showing the lighter border as a diffuse reaction zone, enriched in unresolvable Fe-Ir-Os-Pt-Ru-Cl-K which are absent from the inner chromite (Table 2, col. 2), and in fine metallic inclusions. Pol. sect. SEM(VS). 50 µm.
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