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Earth, Planets and Space
Fig. 5 | Earth, Planets and Space

Fig. 5

From: Middle Miocene forearc alkaline magmatism in Amami-Oshima Island, central Ryukyu Arc: implications for paleoreconstruction of Shikoku Basin

Fig. 5

Primitive mantle normalized trace element patterns of basaltic rocks in Amami-Oshima Island. Trace element patterns of basaltic rocks in Amami-Oshima Island in comparison with a OIB, N-MORB, and E-MORB; b Miocene alkaline basaltic rocks; and c island arc basalt-like rocks. Data for Miocene rocks were compiled from the following sources: Kiminami et al. (2017) for Tanegashima, Otoyo, and Shingu; Shinjoe et al. (2003) for Cape Ashizuri; and Shinjo et al. (1999) for Kume-jima and Tonaki-jima. Data for N-MORB and E-MORB are obtained from Gale et al. (2013). The primitive mantle values were obtained from Sun and McDonough (1989). Note that HFSE such as Nb, Ta, and Ti (highlighted in red) are depleted in volcanic rocks in Kume-jima and Tonaki-jima, but not depleted in basaltic dikes on Amami-Oshima Island

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