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Fig. 4 | Progress in Earth and Planetary Science

Fig. 4

From: Lithological structure of western Pacific lithosphere reconstructed from mantle xenoliths in a petit-spot volcano

Fig. 4

Geochemistry of the petit-spot basalts. a Total alkali silica diagram. Triangles and circles show the whole-rock and quenched glass compositions, respectively. The whole-rock composition of 6K#1466 basalts (pink triangles) is highly silica-undersaturated. The compositions previously reported at petit-spots from the NW Pacific are represented as open triangles and circles (Hirano et al. 2006; Machida et al. 2015; Sato et al. 2018). b Primitive mantle normalized trace-element compositions of basalts. The pink lines are 6K#1466 basalts in this study, and the blue lines are those reported by Hirano et al. (2019). The gray lines describe previously reported petit-spots from the NW Pacific (Hirano et al. 2006; Machida et al. 2015; Sato et al. 2018). Dotted lines describe the values of representative OIBs (Oceanic Island Basalts) and primitive mantle, from Sun and McDonough (1989). The numerical data are provided in Table 1

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