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Progress in Earth and Planetary Science
Fig. 4 | Progress in Earth and Planetary Science

Fig. 4

From: Si- versus Mg-metasomatism at the crust–mantle interface: insights from experiments, natural observations and geochemical modeling

Fig. 4

a–e The Higuchi serpentinite body in the Sanbagawa belt, Japan (modified after Okamoto et al. 2021). a, left Outcrop photograph and (right) close-up view of the chlorite rock and the Act–Chl schist at the contact between a serpentinite body and pelitic schist. b Branching Tlc–Cb vein networks in the serpentinite body. c Photomicrograph of a dolomite vein with a talc selvage in the massive antigorite under cross-polarized light. d Back-scattered electron image of the Act–Chl schist. e Photomicrographs (plane-polarized light) of the chlorite rock, showing the relic banded graphite-rich layers and quartz veins in the pelitic schist. Chlorite has formed around the altered Cr-rich spinel. f Photograph and g sketch of the reaction zones between the serpentinite body and pelitic schist in Tomisato body (modified after Oyanagi et al. 2023). Act: actinolite, Chl: chlorite, Gr: graphite, Spl: spinel, Dol: dolomite, Tlc: talc, Qz: quartz, Grt: garnet, Atg: antigorite, Srp: serpentine

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