著者
高橋 正樹
出版者
特定非営利活動法人 日本火山学会
雑誌
火山 (ISSN:04534360)
巻号頁・発行日
vol.40, no.1, pp.33-42, 1995
参考文献数
22
被引用文献数
6 7

There is no positive correlation between the long-term eruption rate of large-scale felsic volcanism and its discharge volume of a single eruptive episode. This means that the storage of voluminous felsic magma at high-level in the crust is caused not by high magma production rate but by continuous accumulation of magma during a long repose time, if the long-term eruption rate reflects the averaged magma production rate. If the cruslal defomation is weak, the magma chamber could be stable in the crust; it is favorable for efficient accumulation of voluminous magma. In fact, the large-volume felsic volcanism occurs exclusively in the region of low crustal strain rate. The low crustal strain rate is considered to be essential for the formation of large-scale felsic volcanism. The large-volume felsic volcanic activity is present in the compressional tectonic stress field as well as in the extensional one; the difference in arrangement of principal stress axes is not related to the occurrence of voluminous felsic volcanism.

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「巨大カルデラ噴火を起こす火山は、地殻の変形速度が小さい地域に位置することが判りました」これはすでに1995年に高橋正樹さんが論文に書いた結論と同じ。新たにわかったというのは疑問。高橋論文:http://t.co/Y8MKEA2d8t
メモ:高橋正樹(1995)大規模珪長質火山活動と地殻歪速度 http://t.co/Wf2GhYMTxW
メモ:高橋正樹(1995)大規模珪長質火山活動と地殻歪速度 http://t.co/Wf2GhYMTxW

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