Fig. 3: Li systematics of primitive arc magmas versus crustal thickness and slab thermal parameter. | Nature Communications

Fig. 3: Li systematics of primitive arc magmas versus crustal thickness and slab thermal parameter.

From: Lithium systematics in global arc magmas and the importance of crustal thickening for lithium enrichment

Fig. 3

a, b Li and Li/Y in primitive arc magmas vs. crustal thickness. Primitive arc magmas represent only those with 48–52 wt.% SiO2 and 6–15 wt.% MgO. In (b), dull gray symbols represent averages for more evolved magmas (53–57 wt.% SiO2). Error bars for Li concentration and Li/Y ratio are 2se; error bars for crustal thickness are one standard deviation (1σ) (Supplementary Dataset 2). As in Fig. 2, the pale green bar in (a and c) and blue bar in (b and d) show the average Li concentration of MORB from Gale et al.22 and the Li/Y ratio of MORB from Ryan and Langmuir9, respectively. The dashed line in (a) represents the linear regression of the data (with the Mariana arc excluded). c, d Li and Li/Y of primitive arc magmas vs. slab thermal parameter (Φ/100). Slab thermal parameters are from Syracuse et al.34.

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