Configuration and Dynamics of Magma Chambers Beneath Arc Volcanoes
Instead of a chamber at the crust-mantle boundary, as shown in Fig. 5.2, a repeatedly refilled magma chamber situated in the crust is analyzed in this chapter.
It is well known that the surface of an active volcano and its surrounding area are gently elevated during a quiet period, they quickly subside immediately after a great eruption, and then become gently elevated again. This type of inflation and deflation is repeated in active volcanoes, resulting in a serrated type of ground deformation over time. It also is well known that the rapid subsidence is due to a pressure drop in the chamber caused by an eruption, and that the gentle uplifting is due to increasing pressure resulting from magma injection into the chamber.
KeywordsVolcanic Rock Lava Flow Lower Crust Lower Chamber Basaltic Magma
- Aramaki S (1980) Chemical compositions of recent ejecta from the south crater at Sakurajima volcano. The 3rd Joint Observations of Sakurajima Volcano, Kyoto University Disaster Prevention Research Institute, Sakurajima Volcano Research Centre, pp 105–109 (In Japanese)Google Scholar
- Fukuyama H, Ono K (1981) Geological map of Sakurajima volcano, 1:25,000. Geological map of volcanoes. Geol Surv Japan 1:1–8 (In Japanese with English abstract)Google Scholar
- Ishihara K, Takayama T, Tanaka Y, Hirabayashi J (1981) Lava flows at Sakurajima volcano (1), Volume of the historical lava flows. Annu Disas Prev Res. Inst Kyoto Univ 24B:1–10 (In Japanese with English abstract)Google Scholar
- Kamo K, Ishihara K (1980) Volcanic activity of Sakurajima as inferred from the ground deformation. Sakurajima regional science investigation conference’s research report, 19–28 (In Japanese with English abstract)Google Scholar
- Kobayashi T (2002) Eruption history of Sakurajima volcano, 8th open lecture, Volcanol. Society Japan. (http://hakone.eri.u-tokyo.ae.jp/kazan/jishome/koukai01/kobayashi.html)
- Mogi K (1958) Relations between the eruptions of various volcanoes and the deformations of the ground surface around them. Bull Earthq Res Inst 36:99–134Google Scholar
- Yanagi T, Arikawa H, Hamamoto R, Hirano I (1988) Petrological implications of strontium isotope compositions of the Kinpo volcanic rocks in Southwest Japan: ascent of the magma chamber by assimilating the lower crust. Geochem J 22:237–248Google Scholar
- Yanagi T, Ichimaru Y, Hirahara S (1991) Petrochemical evidence for coupled magma chambers beneath the Sakurajima volcano, Kyushu, Japan. Geochem J 25:17–30Google Scholar