Fukujin is one of the largest submarine volcanoes in the Northern Seamount Province (Bloomer et al., 1989) with a simple conical shape (Yamazaki et al., 1993). The last known eruption was in 1974 and since then intermittent water discoloration and floating pumice have been observed. There is no direct evidence for hydrothermal activity, because it has not been visited on the bottom. Lavas dredged from Fukujin are mainly porphyritic basaltic andesites, with a few nearly aphyric, medium-K siliceous andesites (Stern et al., 1993).
Low-and medium-K Tholeiitic andesites and Basaltic andesites
Stern et al., 1993
Vent fluid characteristics: None known
Vent Biology: None known
Images: None known
Video Links: None known
References:
Bloomer, S. H., Stern, R. J., Fisk, E., Geschwind, C. H., 1989. Shoshonitic Volcanism in the Northern Mariana Arc. 1. Mineralogic and Major and Trace Element Characteristics. Journal of Geophysical Research 94 (B4), 4469-4496.
Stern, R. J., Jackson, M. C., Fryer, P., Ito, E., 1993. O, Sr, Nd and Pb isotopic composition of the Kasuga Cross-Chain in the Mariana Arc: A new perspective on the K-h relationship. Earth and Planetary Science Letters 119, 459-475.
Yamazaki, T., Murakami, F., Saito, E., 1993. Mode of seafloor spreading in the northern Mariana Trough. Tectonophysics 221, 207-222.
