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Southern EPR-Segment I

Southern EPR at 18.5°S (Segment I)

Frattura eruttiva · Undersea Features · 2600 m (sottomarino)

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. · Foto: Image courtesy of NOAA Vents Program, 1994 (www.pmel.noaa.gov/vents/chemistry/images/).
Tipo
Frattura eruttiva
Paese
Undersea Features
Regione
Southern Pacific Volcanic Regions / Southern East Pacific Rise Volcanic Province
Altitudine
2600 m (sottomarino)
Coordinate
-18.530, -113.420
Ultima eruzione
1915
Contesto tettonico
Rift zone / Oceanic crust (< 15 km)
Forma vulcanica
Cluster
Roccia principale
Basalt / Picro-Basalt
Sintesi geologica

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.

Storia delle eruzioni

Riepilogo (VEI nel tempo)
Fai clic su una barra per vedere le singole eruzioni
1620~1650 · 1 eruzioni · VEI max. 01856~1886 · 1 eruzioni · VEI max. 01886~1915 · 1 eruzioni · VEI max. 016201679176818271886

Cronologia dettagliata

  1. 1915 (±40 anni)VEI 0Stima geologica
    1915 – In corso
  2. 1860VEI 0Stima geologica
    1860 – In corso
  3. 1620VEI 0Stima geologica
    1620 – In corso

Link esterni

⚠ Solo a scopo informativo. Non adatto a situazioni di emergenza.