北海道濁川盆地および周辺の温泉に関する化学的考察

• 吉田 裕

  日本重化学工業(株)

書誌事項

タイトル別名

• Chemical study on the hot springs and wells in and around the Nigorikawa Basin, southwest Hokkaido, Japan
• ホッカイドウ ニゴリガワ ボンチ オヨビ シュウヘン ノ オンセン ニ カンス

抄録

Chemical and isotopic compositions of hot spring waters and well discharges of the Nigorikawa geothermal area were examined. On the basis of SO₄/Cl ratios, geothermal waters can be classified into four groups from high to low value as follows; (1)Hot springs located at outside the Basin, (2)Hot water discharged from wells drilled into the pre-Tertiary formation of outside the Nigorikawa caldera, (3)Hot water discharged from wells drilled into a fracture zone of caldera wall, (4)Hot springs in the Nigorikawa Basin. Such a classification coincides with the geological conditions of reservoir. Although four types of hot water exist, almost all SO₄ ion are supplied from anhydrite contained in formations, and the SO₄ concentration is controlled by an anhydrite solubility. Anhydrite, Cl and Br are derived from sea water. Geothermal water is basically mixture of sea water and meteoric water. But, hot waters show very high enrichment of ¹⁸O (δ¹⁸O= 23‰ at δD=0‰ extrapolation), and the relation between Cl and δD of hot waters are different from that of simple mixture of surface water and sea water. It suggests that seawater is altered in the penetrating process.

収録刊行物

• 地球化学

  地球化学 24 (1), 65-77, 1990

  一般社団法人日本地球化学会

詳細情報

• CRID: 1390001205743148288
• NII論文ID: 110008679840
• NII論文ID: 10003917461
• NII書誌ID: AN00141280
• DOI: 10.14934/chikyukagaku.24.65
• ISSN: 21885923
• ISSN: 03864073
• NDL書誌ID: 3688659
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I3688659
• 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