Southern EPR-Segment J

Southern EPR at 18.2°S (Segment J)

열극 분화구 · Undersea Features · 2650m (해저)

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: Undersea Features
지역: Southern Pacific Volcanic Regions / Southern East Pacific Rise Volcanic Province
해발: 2650m (해저)
좌표: -18.175, -113.350
마지막 분화: 1890년
판구조 환경: Rift zone / Oceanic crust (< 15 km)
화산 지형: Cluster
주요 암석: Basalt / Picro-Basalt

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

요약 (VEI 시계열)

막대를 클릭하면 개별 분화가 표시됩니다

상세 타임라인

1890년VEI 0지질학적 추정
1890 ~ 진행 중
1820년VEI 0지질학적 추정
1820 ~ 진행 중

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