火山噴火におけるマグマ中の揮発性物質の挙動 : 斑晶中のガラス包有物の分析に基づくアプローチ

• 斎藤 元治

  岡山大学地球内部研究センター

• 日下部 実

  岡山大学地球内部研究センター

書誌事項

タイトル別名

• Behavior of Magmatic Volatiles in Volcanic Eruptions Based on Glass Inclusion Analysis
• カザン フンカ ニ オケル マグマチュウ ノ キハツセイ ブッシツ ノ キョド

抄録

The role of volatiles in volcanic eruptions was reviewed in view of the measured concentration of volatiles in glass inclusions in phenocrysts. Since the amount of volatiles in a glass inclusion is very small (typically ranging from 10^-11 to 10^-8 mol), a special attention has to be paid to the extraction techniques and analytical methods. Advantage and disadvantage were discussed for the four extraction/analytical techniques; (1) vacuum heating methods, (2) electron-probe microanalysis, (3) ion-probe microanalysis, and (4) infrared spectrometry. The glass inclusion analyses suggest that (1) the volatile concentration in a magma of an early stage of eruption is significantly higher than that of the later stage, (2) a gas phase (H₂O, CO₂ and SO₂) accumulates in a magma chamber during its residence at a shallow depth, and (3) accumulation of data on volatiles in magmas contributes to the understanding of the effect of volcanic eruptions on the climatic changes and evolution of atmosphere.

収録刊行物

• 火山.第２集

  火山.第２集 34 (4), 275-293, 1989

  特定非営利活動法人 日本火山学会

詳細情報

• CRID: 1390282681099300608
• NII論文ID: 110002996512
• NII書誌ID: AN10512786
• ISSN: 04534360
• ISSN: 24330590
• DOI: 10.18940/kazanc.34.4_275
• NDL書誌ID: 3649762
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I3649762
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可