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Figure 3. Th/Ta vs. La/Yb diagram for basalts of oceanic plateaus, island arcs, and Archean greenstone belts.
1 - Late Archean basalt of the Lumby Lake greenstone belt, southwestern Superior Province, Canadian shield, after [Tomlinson et al., 1999], 2 - basalts of the Aruba Plateau, 3 - Late Archean basalts of the Schreiber-Hemlo greenstone belt, southern Superior Province, Canadian shield [Kerrich et al., 1999]. Outlined are fields for basalts of the Ontong Java Plateau (OJP) and island arc volcanics (ARCS) [Condie, 1994, 1997b]. PM = primitive mantle, DM = depleted mantle.


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