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Aracar

성층화산 · Argentina · 6095m

Aracar volcano in Argentina has a 1.5-km-wide summit crater in the center of this May 2019 Planet Labs satellite image monthly mosaic (N is at the top; this image is approximately 22 km across). Lobate lava flows with pressure ridges are exposed along the lower southern flanks, and lava flows have been emplaced around topographic highs on the W, E, and S.
Aracar volcano in Argentina has a 1.5-km-wide summit crater in the center of this May 2019 Planet Labs satellite image monthly mosaic (N is at the top; this image is approximately 22 km across). Lobate lava flows with pressure ridges are exposed along the lower southern flanks, and lava flows have been emplaced around topographic highs on the W, E, and S. · 사진: Satellite image courtesy of Planet Labs Inc., 2019 (https://www.planet.com/). · Wikimedia Commons
화산 유형
성층화산
국가
Argentina
지역
South America Volcanic Regions / Central Andean Volcanic Arc
해발
6095m
좌표
-24.290, -67.783
마지막 분화
미확인
판구조 환경
Subduction zone / Continental crust (> 25 km)
화산 지형
Composite
주요 암석
Andesite / Basaltic Andesite
지질학적 요약

Aracar is a steep-sided stratovolcano with a youthful-looking summit crater 1-1.5 km in diameter that contains a small lake. It is located just east of the Argentina-Chile border. The volcano was constructed during three eruptive cycles dating back to the Pliocene. The andesitic stratovolcano overlies dacitic lava domes. Lava flows found at the base of the volcano below 4500 m elevation are relatively well preserved, but upper-flank lavas, often an indication of youthful activity, are not present (de Silva, 2007 pers. comm.). There were reports of possible ash columns from the summit in 1993, but it is not known whether these were rockfall dust or eruption plumes.

Wikipedia 요약

영어 요약

Aracar is a large conical stratovolcano in northwestern Argentina, just east of the Chilean border. It has a main summit crater about 1–1.5 kilometres (0.6–0.9 mi) in diameter and sometimes contains crater lakes and a secondary crater. The volcano has formed, starting during the Pliocene, on top of a lava platform and an older basement. Constructed on a base with an altitude of 4,100 metres (13,500 ft), it covers a surface area of 192.4 square kilometres (74.3 sq mi) and has a volume of 148 cubic kilometres (36 cu mi). The only observed volcanic activity was a possible steam or ash plume on March 28, 1993, seen from the village of Tolar Grande about 50 km (31 mi) southeast of the volcano, but with no evidence of deformation of the volcano from satellite observations. Inca archeological sites are found on the volcano.

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분화 이력

요약 (VEI 시계열)
막대를 클릭하면 개별 분화가 표시됩니다
1993~1993 · 1건 · 최고 VEI 219931993199419941994

상세 타임라인

  1. 1993년VEI 2지질학적 추정
    1993-03-28 ~ 진행 중

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