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Progress in Earth and Planetary Science
Fig. 2 | Progress in Earth and Planetary Science

Fig. 2

From: Geochemical characteristics of back-arc basin lower crust and upper mantle at final spreading stage of Shikoku Basin: an example of Mado Megamullion

Fig. 2

Seafloor observation and rock samples from Mado Megamullion. a Representative occurrence of gabbroic rocks on the seafloor. b Representative occurrence of peridotitic rocks with platy dike intrusion on the seafloor. a, b were taken during submersible diving of 6K-1536 and 6K-1515, respectively. c YK18-07-6K-1515-R14 oxide gabbro. d A contact between YK20-18S-6K-1569-R4-1 gabbro and YK20-18S-6K-1569-R4-2 oxide gabbro. e YK18-07-6K-1515-R10 peridotite with gabbroic vein network. f YK18-07-6K-1515-R6 peridotite with oxide gabbroic vein network. Abbreviations: Ga = gabbro, Ol ga = olivine gabbro, Ox ga = oxide gabbro, and Pe = peridotite

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