大規模珪長質火山活動と地殻歪速度

• 高橋 正樹

  茨城大学理学部地球科学教室

書誌事項

タイトル別名

• Large-volume Felsic Volcanism and Crustal Strain Rate
• ダイキボ ケイチョウシツ カザン カツドウ ト チカク ヒズミソクド

抄録

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.

収録刊行物

• 火山

  火山 40 (1), 33-42, 1995

  特定非営利活動法人 日本火山学会

詳細情報

• CRID: 1390282679280882432
• NII論文ID: 10004653754
• NII論文ID: 110003041025
• NII書誌ID: AN10512786
• DOI: 10.18940/kazan.40.1_33
• ISSN: 21897182
• ISSN: 04534360
• NDL書誌ID: 3624090
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I3624090
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • CiNii Articles
  • Crossref
• 抄録ライセンスフラグ: 使用不可