Figure 4 | Scientific Reports

Figure 4

From: Gradual and selective trace-element enrichment in slab-released fluids at sub-arc depths

Figure 4

Th/La vs. La/Ta variations for ultrapotassic lavas. (a) Lavas from the Roman Province (Italy). (b) Lavas from the Tuscany Province. For comparison, lavas from Roman Province (Fig. 4a) are also reported. From the datasets47 (http://georoc.mpch-mainz.gwdg.de/georoc/), only analyses having MgO > 4 wt%, LOI < 4 wt%, and Na2O/K2O < 8 have been plotted in order to consider the most primitive rocks46,47.

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