学術雑誌論文 Giant rhyolite lava dome formation after 7.3 ka supereruption at Kikai caldera, SW Japan

Tatsumi, Yoshiyuki  ,  Suzuki-Kamata, Keiko  ,  Matsuno, Tetsuo  ,  Ichihara, Hiroshi  ,  Seama, Nobukazu  ,  Kiyosugi, Koji  ,  Nakaoka, Reina  ,  Nakahigashi, Kazuo  ,  Takizawa, Hideaki  ,  Hayashi, Kazuki  ,  Chiba, Tatsuro  ,  Shimizu, Satoshi  ,  Sano, Mamoru  ,  Iwamaru, Hikaru  ,  Morozumi, Haruhisa  ,  Sugioka, Hiroko  ,  Yamamoto, Yojiro

8p.2753 , 2018-02-09 , Nature Publishing Group
ISSN:2045232220452322
内容記述
Kikai submarine caldera to the south of the Kyushu Island, SW Japan, collapsed at 7.3 ka during the latest supereruption (>500 km3 of magma) in the Japanese Archipelago. Multi functional research surveys of the T/S Fukae Maru in this caldera, including multi-beam echosounder mapping, remotely operated vehicle observation, multi-channel seismic reflection survey, and rock sampling by dredging and diving, provided lines of evidence for creation of a giant rhyolite lava dome (~32 km3) after the caldera collapse. This dome is still active as water column anomalies accompanied by bubbling from its surface are observed. Chemical characteristics of dome-forming rhyolites akin to those of presently active small volcanic cones are different from those of supereruption. The voluminous post-caldera activity is thus not caused simply by squeezing the remnant of syn-caldera magma but may tap a magma system that has evolved both chemically and physically since the 7.3-ka supereruption.
本文を読む

http://www.lib.kobe-u.ac.jp/repository/90004609.pdf

このアイテムのアクセス数:  回

その他の情報