Fig. 4: Magmatic flare-up record from shallower arc rocks. | Communications Earth & Environment

Fig. 4: Magmatic flare-up record from shallower arc rocks.

From: Magmatic flare-up causes crustal thickening at the transition from subduction to continental collision

Fig. 4

A Distribution of Eu/Eu* anomalies from bulk-rock across the Kabyé arc root with respect to distance from the westernmost boundary of the massif (near sample DKE-371 in Fig. 1B), which represents the arc deepest position (proxy for arc depth). The samples from the arc bottom have predominantly positive Eu anomalies suggesting shallower crystallization/differentiation, within the plagioclase stability field. Inset shows REE distribution and the positive Eu anomaly of selected samples from the lower arc rocks. Data from ref. 24. B Age distribution of detrital and igneous zircons from arc-related basins and granitoids from Togo and NE Brazil23,26,27,34,35 depicting maximum magmatic addition rate at 620–625 Ma within a 660–580 flare-up. Inset: distribution of U-Pb and Ar–Ar43 ages from the igneous and metamorphic rocks of the Kabyé arc root.

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