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Þeistareykjarbunga

Theistareykir

Gunung api perisai · Iceland · 563 m

Stóravíti crater, seen here from the SE, is 600 m across and 140 m deep. It is located in the summit area of the Holocene Theistareykjarbunga shield volcano, part of the northernmost subaerial volcanic system along the Eastern Volcanic Zone of Iceland. The youngest dated eruption in this system produced the Theistareykjahraun lava flow about 2,400 years ago.
Stóravíti crater, seen here from the SE, is 600 m across and 140 m deep. It is located in the summit area of the Holocene Theistareykjarbunga shield volcano, part of the northernmost subaerial volcanic system along the Eastern Volcanic Zone of Iceland. The youngest dated eruption in this system produced the Theistareykjahraun lava flow about 2,400 years ago. · Foto: Photo by Michael Ryan, 1984 (U.S. Geological Survey).
Tipe
Gunung api perisai
Negara
Iceland
Wilayah
Atlantic Ocean Volcanic Regions / Iceland Neovolcanic Rift Volcanic Province
Ketinggian
563 m
Koordinat
65.883, -16.967
Letusan terakhir
-900
Kondisi tektonik
Rift zone / Oceanic crust (< 15 km)
Bentuk lahan
Shield
Batuan utama
Basalt / Picro-Basalt
Ringkasan geologi

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.

Ringkasan Wikipedia

Ringkasan Inggris

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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Riwayat letusan

Ringkasan (VEI dari waktu ke waktu)
Klik pada bar untuk melihat letusan individu
9500 BCE~9213 BCE · 1 letusan · VEI maks. 06920 BCE~6633 BCE · 1 letusan · VEI maks. 01187 BCE~900 BCE · 1 letusan · VEI maks. 09500 BCE7493 BCE5200 BCE3193 BCE1187 BCE

Garis waktu rinci

  1. 900 SM (±100 tahun)VEI 0Perkiraan geologi
    BCE 900 – Berlangsung
    Storihver (Theistareykjahraun)
  2. 6800 SMVEI 0Perkiraan geologi
    BCE 6800 – Berlangsung
    Borgarhraun and other flows
  3. 9500 SMVEI 0Perkiraan geologi
    BCE 9500 – Berlangsung
    Theistareykjabunga shield volcano

Tautan eksternal

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