Fig. 9

Chondrite-normalized REE patterns for whole rocks of Akagi Volcano. The normalized values are from McDonough and Sun (1995). The hatched area shows the range of REE patterns for andesite lava flows in the volcanic cone-building stage (Kobayashi and Nakamura 2001). Other data are from Yamamoto (2016). The Itoi Pumice Flow (SiO₂ = 62.7–65.6 wt%) erupted at the end of the volcanic cone-building stage (160 ka). The Tanashita, Wakubara, Ogo Pumice Flows (SiO₂ = 56.9–64.4 wt%) erupted during the pumice-eruption stage