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Southern EPR-Segment J

Southern EPR at 18.2°S (Segment J)

Rekahan erupsi · Undersea Features · 2650 m (bawah laut)

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/).
Tipe
Rekahan erupsi
Negara
Undersea Features
Wilayah
Southern Pacific Volcanic Regions / Southern East Pacific Rise Volcanic Province
Ketinggian
2650 m (bawah laut)
Koordinat
-18.175, -113.350
Letusan terakhir
1890
Kondisi tektonik
Rift zone / Oceanic crust (< 15 km)
Bentuk lahan
Cluster
Batuan utama
Basalt / Picro-Basalt
Ringkasan geologi

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.

Riwayat letusan

Ringkasan (VEI dari waktu ke waktu)
Klik pada bar untuk melihat letusan individu
1820~1827 · 1 letusan · VEI maks. 01883~1890 · 1 letusan · VEI maks. 018201834185518691883

Garis waktu rinci

  1. 1890VEI 0Perkiraan geologi
    1890 – Berlangsung
  2. 1820VEI 0Perkiraan geologi
    1820 – Berlangsung

Tautan eksternal

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