Fig. 6: Elemental ratios and neodymium isotopes characterize slab makeup and temperature during Expedition 352 high-silica boninite generation. | Nature Communications

Fig. 6: Elemental ratios and neodymium isotopes characterize slab makeup and temperature during Expedition 352 high-silica boninite generation.

From: Boron isotopes in boninites document rapid changes in slab inputs during subduction initiation

Fig. 6: Elemental ratios and neodymium isotopes characterize slab makeup and temperature during Expedition 352 high-silica boninite generation.The alternative text for this image may have been generated using AI.

εNdi (left y-axis) vs. Cs/La diagram for the Expedition 352 and Bonin Islands60 high-silica boninite (HSB), Izu-Bonin trench sediments38 and altered basalts48,67. The temperature (°C; right y-axis) versus Cs/La paths for sediment (light gray dotted line; calculated after Hermann and Rubatto57 at 2.5–4.5 GPa) and basalt (light blue dotted line; calculated after Kessel et al.68 at 4 GPa with Ocean Drilling Program Site 801 “Super-Component” as starting material) dehydration/melting are also plotted for comparison. The red dashed lines are used to estimate the slab dehydration/melting temperature during HSB generation of this study according their highest Cs/La ratio. AOC: altered oceanic crust.

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