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Progress in Earth and Planetary Science
Fig. 10 | Progress in Earth and Planetary Science

Fig. 10

From: Clockwise rotation of SW Japan and timing of Izanagi–Pacific ridge subduction revealed by arc migration

Fig. 10

A Adakite discrimination diagram using Sr and Y content in felsic magma during the period 130–30 Ma (Defant and Drummond 1990). Rocks showing SiO2 < 56 wt%, Al2O3 < 14.5 wt% and Na2O < 3 wt% are not included in the plot to find Sr and Y features in the range of major elements typical of adakite (e.g., Castillo 2012). ADR = andesite–dacite–rhyolite. B Re-plotted data of (A) with age as the horizontal axis. High-Sr/Y ratios signify adakite activity. The data sources are shown in Additional file 3: Table S3

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