Figure 8. Analytical transects across Cr-rich spinels from Hole 917A, Upper Series. All spinels given represent inclusions within or attached and partially embedded within altered olivine phenocrysts. Cr# = Cr/(Cr + Al + Fe3+), Mg# = Mg/(Mg + Fe2+), Fe# = Fe3+/(Cr + Al + Fe3+), and Melt Mg# = Melt Mg/(Mg + Fe2+) inferred from Cr-rich spinel compositions as explained in the text. BSE images of the crystals analyzed are given in Figure 4, with analyses from the traverses given in Table 2.
