Figure 3. Backscattered electron image of minerals in a metamorphosed Barberton komatiite. Light gray, tabular minerals are preserved high-Ca igneous augitic pyroxenes. Pyroxene grains display change in contrast from dark in center to light at edges. Contrast shows igneous zoning from magnesian core to iron-enriched rim. Metamorphic amphibole (tremolite) surrounds pyroxene. Dark areas represent metamorphosed groundmass consisting of serpentine, chlorite, and magnetite. Sample is B95-7 from Parman et al. (1997). Ion microprobe pits are from measurements of rare earth elements (Parman et al., 1996).