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Southern EPR-Segment J

Southern EPR at 18.2°S (Segment J)

Frattura eruttiva · Undersea Features · 2650 m (sottomarino)

Black smoker hydrothermal vents emitting high-chlorinity fluids were photographed at the "RM29" site at 18°10’S. This image was taken in November 1994 from the Japanese submersible Shinkai 6500. The axial crest of Segment J of the Southern East Pacific Rise consists of an asymmetrical shallow graben varying from 250 to 600 m wide with walls about 20 m high.
Black smoker hydrothermal vents emitting high-chlorinity fluids were photographed at the "RM29" site at 18°10’S. This image was taken in November 1994 from the Japanese submersible Shinkai 6500. The axial crest of Segment J of the Southern East Pacific Rise consists of an asymmetrical shallow graben varying from 250 to 600 m wide with walls about 20 m high. · 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
2650 m (sottomarino)
Coordinate
-18.175, -113.350
Ultima eruzione
1890
Contesto tettonico
Rift zone / Oceanic crust (< 15 km)
Forma vulcanica
Cluster
Roccia principale
Basalt / Picro-Basalt
Sintesi geologica

The axial crest of Segment J of the Southern East Pacific Rise consists of an asymmetrical shallow graben varying from 250 to 600 m wide with walls about 20 m high. Horst and graben structures expose cooled lava lakes and both active and extinct hydrothermal chimneys. Basaltic lava flow fields, lava pillars, and pillow mounds are found on the floor of the graben. The largest lava flow field is the Moai lava flow at about 18°12'S. Two lava flows have been dated by paleomagnetic evidence at about 1820 and 1890 CE.

Storia delle eruzioni

Riepilogo (VEI nel tempo)
Fai clic su una barra per vedere le singole eruzioni
1820~1827 · 1 eruzioni · VEI max. 01883~1890 · 1 eruzioni · VEI max. 018201834185518691883

Cronologia dettagliata

  1. 1890VEI 0Stima geologica
    1890 – In corso
  2. 1820VEI 0Stima geologica
    1820 – In corso

Link esterni

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