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해저 지형 · 열극 분화구

Southern EPR-Segment J

Southern EPR at 18.2°S (Segment J)

화산 유형
열극 분화구
해발
2650m (해저)
마지막 분화
1890년
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. · 사진: Image courtesy of NOAA Vents Program, 1994 (www.pmel.noaa.gov/vents/chemistry/images/).
화산 유형
열극 분화구
국가
해저 지형
지역
남태평양 / Southern East Pacific Rise Volcanic Province
해발
2650m (해저)
좌표
-18.175, -113.350
마지막 분화
1890년
판구조 환경
열곡대 / 해양 지각 (< 15 km)
화산 지형
화산군
주요 암석
현무암 / 피크로현무암
지질학적 요약

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.

분화 이력

2건 기록용어집
요약 (VEI 시계열)
막대를 클릭하면 개별 분화가 표시됩니다 · 화살표 키로 막대 이동, Enter로 열기
1820~1827 · 1건 · 최고 VEI 01883~1890 · 1건 · 최고 VEI 018201834185518691883

상세 타임라인

  1. 1890년VEI 0지질학적 추정
    1890-07-02 ~ 종료일 미상
  2. 1820년VEI 0지질학적 추정
    1820-07-02 ~ 종료일 미상

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