BackgroundVolcanism of the Abu group is believed to be caused by upwelling mantle diapirs, and is is related to subduction of the Philippine Sea Plate. The volcanic group is part of the southwestern Japanese arc, which lies subparallel to the Nankai trough.
The erupted magmas of Abu are mainly alkaline basalt and calc-alkaline andesite - dacite in composition.
Eruptions from Abu volcano:
Volcanic activity occurred mainly in 2 phases. An earlier and more intense phase of activity was between ca. 3 and 1.6 million years ago when a quiescent interval followed. The second, less intense phase of activity started about 800,000 years ago and continues into present. The latest known eruption of the AMVG was dated by thermoluminescence at about 8800 years ago.
- Smithsonian / GVP volcano information
- Kiyosugi et al (2010) "Relationships between volcano distribution, crustal structure, and P-wave tomography: An example from the Abu monogenetic volcano group, SW Japan." Bull. Volcanol. 72 (3), 331-340.
See also: Sentinel hub | Landsat 8