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Southern EPR-Segment J

Southern EPR at 18.2°S (Segment J)

Fisura volcánica · Undersea Features · 2650 m (submarino)

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
Fisura volcánica
País
Undersea Features
Región
Southern Pacific Volcanic Regions / Southern East Pacific Rise Volcanic Province
Altitud
2650 m (submarino)
Coordenadas
-18.175, -113.350
Última erupción
1890
Contexto tectónico
Rift zone / Oceanic crust (< 15 km)
Forma volcánica
Cluster
Roca principal
Basalt / Picro-Basalt
Resumen geológico

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.

Historial de erupciones

Resumen (VEI en el tiempo)
Haga clic en una barra para ver erupciones individuales
1820~1827 · 1 erupciones · VEI máx. 01883~1890 · 1 erupciones · VEI máx. 018201834185518691883

Línea de tiempo detallada

  1. 1890VEI 0Estimación geológica
    1890 – En curso
  2. 1820VEI 0Estimación geológica
    1820 – En curso

Enlaces externos

⚠ Solo como referencia. No apto para respuesta ante emergencias.