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海底地形 · 割れ目火口

Southern EPR-Segment I

Southern EPR at 18.5°S (Segment I)

タイプ
割れ目火口
標高
2600m (海底)
最終噴火
1915年
Black smoker vents emitting low-chlorinity fluids at 374°C were photographed at the "RM28" site at 18°26’S on Segment I of the Southern East Pacific Rise in November 1994 from the Japanese submersible Shinkai 6500. The narrow axial crest of Segment I of the Southern East Pacific Rise in some places is less than 50 m wide. The largest lava flow field in this area is the Animal Farm flow, named after a thriving low-temperature hydrothermal site discovered during a 1993 submersible expedition.
Black smoker vents emitting low-chlorinity fluids at 374°C were photographed at the "RM28" site at 18°26’S on Segment I of the Southern East Pacific Rise in November 1994 from the Japanese submersible Shinkai 6500. The narrow axial crest of Segment I of the Southern East Pacific Rise in some places is less than 50 m wide. The largest lava flow field in this area is the Animal Farm flow, named after a thriving low-temperature hydrothermal site discovered during a 1993 submersible expedition. · 写真: Image courtesy of NOAA Vents Program, 1994 (www.pmel.noaa.gov/vents/chemistry/images/).
タイプ
割れ目火口
国
海底地形
地域
南太平洋 / Southern East Pacific Rise Volcanic Province
標高
2600m (海底)
座標
-18.530, -113.420
最終噴火
1915年
テクトニクス環境
リフト帯 / 海洋地殻 (< 15 km)
火山地形
火山群
主要岩石
玄武岩 / ピクライト質玄武岩
地質学的概要

The narrow axial crest of Segment I of the Southern East Pacific Rise in some places is less than 50 m wide. An axial dome is located along the southern part of the segment. The largest lava flow field in this segment is the Animal Farm flow, named after a thriving low-temperature hydrothermal site discovered during a submersible expedition in 1993. The Animal Farm lava flow was dated by magnetic paleointensity measurements at about 1880-1950 CE, and older flows were dated by similar techniques to the 17th and 19th centuries.

噴火履歴

3件の記録用語集
概要 (VEI時系列)
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1620~1650 · 1件 · 最大 VEI 01856~1886 · 1件 · 最大 VEI 01886~1915 · 1件 · 最大 VEI 016201679176818271886

詳細タイムライン

  1. 1915年 (±40年)VEI 0地質学的推定
    1915-07-02 ~ 終了日不明
  2. 1860年VEI 0地質学的推定
    1860-07-02 ~ 終了日不明
  3. 1620年VEI 0地質学的推定
    1620 ~ 終了日不明

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