Beppu–Shimabara graben

The Beppu-Shimabara graben (別府‐島原地溝帯 Beppu-Shimabara Chikōtai) is a geological formation that runs across the middle of Kyushu, Japan, from Beppu Bay in the east to the Shimabara Peninsula in the west.[1] The area is known for its volcanic, geothermal, and seismic activity.[2] It encompasses several significant geological features, including a number of active volcanoes. The most prominent is Mount Aso, an active volcanic formation consisting of one of the world's largest calderas and a central central crater group with five distinct peaks.[3] Beppu Onsen is located at the eastern end of the graben.

It is located at the overlap of two magma types -- within plate type to the north, and island-arc type to the south -- that erupted in the Quaternary: to the north, the eastern end of the Eurasian Plate and, to the south, the subduction zone of the Philippine Sea Plate.[4] It runs about 200 kilometres east to west and its north-south width varies between 20 and 30 kilometres.[5]

References

  1. ↑ "Contemporaneous ascent of within-plate type and island-arc type magmas in the Beppu–Shimabara graben system, Kyushu island, Japan". Journal of Volcanology and Geothermal Research. 111 (1-4): 99. November 2001. doi:10.1016/s0377-0273(01)00222-0. Retrieved 16 April 2016.
  2. ↑ Handa, Shun (2005). "Electrical conductivity structures estimated by thin sheet inversion, with special attention to the Beppu-Shimabara graben in central Kyushu, Japan" (PDF). Earth Planets Space. The Society of Geomagnetism and Earth, Planetary and Space Sciences (57): 605. Retrieved 16 April 2016.
  3. ↑ "Description of Mt. Aso". Information on Restrictions for the Aso Volcano Crater. The Aso Volcano Disaster Prevention Council. 2008. Retrieved 16 April 2016.
  4. ↑ "Contemporaneous ascent of within-plate type and island-arc type magmas in the Beppu–Shimabara graben system, Kyushu island, Japan". Journal of Volcanology and Geothermal Research. 111 (1-4): 99. November 2001. doi:10.1016/s0377-0273(01)00222-0. Retrieved 1 December 2016.
  5. ↑ "Geothermal sciences within the "Beppu-Shimabara Graben"". Institute for Geothermal Sciences (IGS). Institute for Geothermal Sciences Kyoto University. Retrieved 16 April 2016.
This article is issued from Wikipedia - version of the 12/1/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.