Figure F40. Nb, (Zr/Ti)_N, and Ni vs. Zr (subscript N indicates ratios normalized to primitive mantle values of Sun and McDonough, 1989). Data for basalts from Leg 183 Sites 1136, 1137, 1138, 1140, 1141, and 1142 are compared with fields for basalts dredged and cored from the Kerguelen Plateau (Sites 738, 747, 749, and 750) and dredged basalts from Eastern and Central Broken Ridge (BR) (Data from Alibert, 1991; Davies et al., 1989; Mahoney et al., 1995; Mehl et al., 1991; Salters et al., 1992; Storey et al., 1992; and Weis et al., 1989). Note that basalts from Site 1141 have the highest Nb, Zr, and Ni contents, basalts from Sites 1138 and 1140 range widely in Nb and Zr contents, and basalts from Sites 738, 1137, 1141, and 1142 have the highest (Zr/Ti)_N.