Þeistareykjarbunga
Theistareykir
순상화산 · Iceland · 563m
- 화산 유형
- 순상화산
- 국가
- Iceland
- 지역
- Atlantic Ocean Volcanic Regions / Iceland Neovolcanic Rift Volcanic Province
- 해발
- 563m
- 좌표
- 65.883, -16.967
- 마지막 분화
- -900년
- 판구조 환경
- Rift zone / Oceanic crust (< 15 km)
- 화산 지형
- Shield
- 주요 암석
- Basalt / Picro-Basalt
지질학적 요약
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 요약
영어 요약Theistareykjarbunga 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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분화 이력
상세 타임라인
- 기원전 900년 (±100년)VEI 0지질학적 추정BCE 900 ~ 진행 중Storihver (Theistareykjahraun)
- 기원전 6800년VEI 0지질학적 추정BCE 6800 ~ 진행 중Borgarhraun and other flows
- 기원전 9500년VEI 0지질학적 추정BCE 9500 ~ 진행 중Theistareykjabunga shield volcano
외부 링크
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