Figure F2. Discrimination Nb-Zr-Y diagram (Meschede, 1986) for basalts from Holes 1136A, 1137A, 1138A, and 1140A (Leg 183) and Hole 747C (Leg 120). AI, AII = fields of intraplate alkali basalts; AII, C = fields of intraplate tholeiites; B = field of P-type MORB; D = field of N-type MORB; C, D = fields of volcanic arc basalts.

Figure F2. Discrimination Nb-Zr-Y diagram (Meschede, 1986) for basalts from Holes 1136A, 1137A, 1138A, and 1140A (Leg 183) and Hole 747C (Leg 120). AI, AII = fields of intraplate alkali basalts; AII, C = fields of intraplate tholeiites; B = field of P-type MORB; D = field of N-type MORB; C, D = fields of volcanic arc basalts.