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Earth, Planets and Space
Fig. 8 | Earth, Planets and Space

Fig. 8

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

Fig. 8

Age and distribution of forearc alkaline (red) and arc (blue) magmatism during middle Miocene. MTL: Median Tectonic Line, KPR: Kyushu-Palau Ridge. The white open triangle indicates Quaternary volcanoes on the volcanic front of Shinjo and Kato (2000). The red and blue symbols represent the alkaline and arc magnetism, respectively. The red star represents the study site. Age ranges for Miocene magmatism were compiled from the following sources: Uto et al. (1987) for the Shingu-Otoyo area; Shinjoe et al. (2010), and Matsumoto et al. (2020) for Cape Ashizuri; Ogasawara (1997) and Taneda & Kinoshita (1972) for Tanegashima; Daishi et al. (1987), Miki (1995), and Nakagawa and Murakami (1975) for Kume-jima; Kato (1985) for Tonaki-jima. The area enclosed by the broken line represents the paleo-location of the Kyushu-Palau Ridge in the middle Miocene, inferred from along the arc variation of magmatism in the central Ryukyu Arc

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