Fig. 6: Shape coefficients of rare earth element patterns53 for comparison of Unit 1 ASB basalts with FAB, MORB/G, and backarc basin basalts of the Philippine Sea Plate. Data sources for a and b are Unit 126, MORB from Gale et al.28 and Jenner & O’Neill56, boninite20,67,68, FAB of Izu-Bonin-Mariana11,54,55 and literature cited in ref. 19. | Nature Communications

Fig. 6: Shape coefficients of rare earth element patterns53 for comparison of Unit 1 ASB basalts with FAB, MORB/G, and backarc basin basalts of the Philippine Sea Plate. Data sources for a and b are Unit 126, MORB from Gale et al.28 and Jenner & O’Neill56, boninite20,67,68, FAB of Izu-Bonin-Mariana11,54,55 and literature cited in ref. 19.

From: Basalt derived from highly refractory mantle sources during early Izu-Bonin-Mariana arc development

Fig. 6: Shape coefficients of rare earth element patterns53 for comparison of Unit 1 ASB basalts with FAB, MORB/G, and backarc basin basalts of the Philippine Sea Plate. Data sources for a and b are Unit 126, MORB from Gale et al.28 and Jenner & O’Neill56, boninite20,67,68, FAB of Izu-Bonin-Mariana11,54,55 and literature cited in ref. 19.

a Lambda 2 (curvature) versus lambda 1 (slope). Schematic chondrite-normalised REE abundance patterns characterised variously by light REE-depletion, enrichment and U-shaped patterns of boninite are shown in the corners of this plot. N-, D-, E-MORB represent normal MORB, depleted MORB, and enriched MORB. b Lambda 3 (sigmoidal character) versus lambda 2. c Lambda 2 versus lambda 1 comparing clinopyroxene from Unit 1 and gabbros at Site 125669 with ocean floor basalts28,56 and Unit 1 bulk rock26.

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