Figure 3
From: Gradual and selective trace-element enrichment in slab-released fluids at sub-arc depths
Diagnostic diagram to distinguish the nature of slab-derived fluids. (a) Th/La vs. La/Ta variations in the analyzed natural UHP aqueous fluid and in experimental hydrous-silicate melts released by sediments at high P-T conditions. (b) Th/La vs. La/Ta variations in natural UHP aqueous fluids and in experimental supercritical fluids and hydrous-silicate melts released by different lithologies at high P-T conditions. MSI2 was not plotted because its Ta content is disguised by the presence of a mineral not precipitated from the fluid (see text). LC and HC: low-, and high-carbon calcareous sediments.
