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East Gakkel Ridge at 85 E

East Gakkel Ridge at 85°E

割れ目火口 · Undersea Features · 3800m (海底)

Detailed bathymetry of the East Gakkel Ridge at 85°E in the Arctic Ocean. The inset map shows the location of the 85°E segment (yellow star) along the Gakkel Ridge (red line). The main panel shows illuminated color bathymetry (30-m grid spacing) of the 85°E segment acquired during the AGAVE expedition. The axial valley contains large numbers of distinctive, cratered volcanoes, including a cone on a fault terrace of the northern valley wall. Named features include two volcanic ridges in the center of the axial valley (Jessica’s Hill and Duque’s Hill), and three cratered volcanoes along a ridge-parallel fissure to the south (Oden, Thor, and Loke). The bathymetry data were plotted with Generic Mapping Tools.
Detailed bathymetry of the East Gakkel Ridge at 85°E in the Arctic Ocean. The inset map shows the location of the 85°E segment (yellow star) along the Gakkel Ridge (red line). The main panel shows illuminated color bathymetry (30-m grid spacing) of the 85°E segment acquired during the AGAVE expedition. The axial valley contains large numbers of distinctive, cratered volcanoes, including a cone on a fault terrace of the northern valley wall. Named features include two volcanic ridges in the center of the axial valley (Jessica’s Hill and Duque’s Hill), and three cratered volcanoes along a ridge-parallel fissure to the south (Oden, Thor, and Loke). The bathymetry data were plotted with Generic Mapping Tools. · 写真: Sohn et al., 2008. Explosive volcanism on the ultraslow-spreading Gakkel ridge, Arctic Ocean. Nature, v. 453, p. 1236-1238.
タイプ
割れ目火口
国
Undersea Features
地域
Atlantic Ocean Volcanic Regions / Arctic Ridge Volcanic Province
標高
3800m (海底)
座標
85.608, 85.250
最終噴火
1999年
テクトニクス環境
Rift zone / Oceanic crust (< 15 km)
火山地形
Cluster
主要岩石
No Data (checked)
地質学的概要

During January-September 1999 global seismic networks detected an earthquake swarm along the East Gakkel Ridge (near 86°N, 85°E). Sonar mapping in May 1999 identified a cone at the western end of a line of volcanoes that corresponded to the average location of the epicenters (Edwards et al., 2001). A survey in July 2007 (Sohn et al., 2008) provided detailed bathymetry and named selected features, including the Oden (location of the 1999 seismicity), Thor, and Loke cones. Both Oden and Loke were covered with a light dusting of pyroclastic material, which was also found throughout the survey area, thought to be products of an eruption during the 1999 swarm.

噴火履歴

概要 (VEI時系列)
バーをクリックすると個別の噴火が表示されます
1999~1999 · 1件 · 最大 VEI 219991999200020002000

詳細タイムライン

  1. 1999年VEI 2観測記録
    1999-04-05 ~ 1999-04-15
    East Gakkel Ridge

外部リンク

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