海水中のヒ素の地球化学バランスに対する熱水の影響

• 鹿園 直建

  慶応義塾大学理工学部地球科学教室

書誌事項

タイトル別名

• Influence of hydrothermal flux on arsenic geochemical balance of seawater
• カイスイチュウ ノ ヒソ ノ チキュウ カガク バランス ニ タイスル ネッス

抄録

Annual hydrothermal flux of arsenic from back arc basins and mid-ocean ridges was estimated based on arsenic concentration of hydrothermal solutions and seawater circulation rate. Estimated values are (0.2-5.2)x10¹¹ g/yr at island arc-back arc basins and (0.8-1.6)x10⁹ g/yr at mid-ocean ridges. The estimated total hydrothermal input flux ((0.28-5.36)×10¹¹ g/yr) is similar to or higher than that of river flux (0.78×10¹¹ g/yr). Total input flux ((1.6-6.1)×10¹¹ g/yr) is same in orders of magnitude to pyrite output flux ((1.3-2.9)×10¹¹ g/yr). Subduction flux is estimated to be (4.0-8.2)×10¹⁰ g/yr. The comparison of subduction flux with hydrothermal flux from island arc-back arc basins suggests that the subduction flux from crust to mantle is small, compared with arsenic circulation in crust-ocean-atmosphere system.

収録刊行物

• 地球化学

  地球化学 27 (2), 135-139, 1993

  一般社団法人日本地球化学会

詳細情報

• CRID: 1390001205741548032
• NII論文ID: 110008679882
• NII論文ID: 10007191716
• NII書誌ID: AN00141280
• DOI: 10.14934/chikyukagaku.27.135
• ISSN: 21885923
• ISSN: 03864073
• NDL書誌ID: 3847963
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I3847963
• 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