セイスタレイキャルブンガ
Theistareykir
楯状火山 · Iceland · 563m
- タイプ
- 楯状火山
- 国
- Iceland
- 地域
- Atlantic Ocean Volcanic Regions / Iceland Neovolcanic Rift Volcanic Province
- 標高
- 563m
- 座標
- 65.883, -16.967
- 最終噴火
- -900年
- テクトニクス環境
- Rift zone / Oceanic crust (< 15 km)
- 火山地形
- Shield
- 主要岩石
- Basalt / Picro-Basalt
地質学的概要
The Holocene Theistareykir fissure system, including the basaltic Theistareykjarbunga shield volcano, extends from north of Myvatn lake to the coast of Iceland. This is the northernmost subaerial volcanic system along the Eastern Volcanic Zone of Iceland. The 30 km3 Theistareykjarbunga shield volcano formed slightly after deglaciation; the youngest dated eruption produced the Theistareykjahraun lava flow about 2,400 years ago.
Wikipedia の要約
英語版の要約Theistareykjarbunga is a shield volcano in north-eastern Iceland with two fissure vents called Þeistareykjahraun and Borgahraun, and two cones: the 370 m (1,210 ft) Stórahversmór and the 540 m (1,770 ft), 30 km3 (7.2 cu mi) Stóravíti. They both are currently extinct, although there is evidence suggesting the potential for activity such as recent localised uplift and seismicity. The multiple vents make up the Theistareykir (Þeistareykir) volcanic system, with more recent evidence that the former classification as a shield volcano is better considered an embryonic central volcano with associated fissure swarm, as rhyolite has erupted in a limited area. The recent lava has picrite, olivine tholeiite basalt characteristics but before the ice age there were basaltic andesite and rhyolite eruptions. There is a central high temperature geothermal area with numerous steam vents and fumaroles. This has been utilised by a 90 MWe power station.
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噴火履歴
詳細タイムライン
- 紀元前 900年 (±100年)VEI 0地質学的推定BCE 900 ~ 進行中Storihver (Theistareykjahraun)
- 紀元前 6800年VEI 0地質学的推定BCE 6800 ~ 進行中Borgarhraun and other flows
- 紀元前 9500年VEI 0地質学的推定BCE 9500 ~ 進行中Theistareykjabunga shield volcano
外部リンク
⚠ 参考情報です。緊急対応には使用しないでください。