鹿塩地域に湧出する塩水の季節変動とその要因について

• 益田 晴恵

  東京大学海洋研究所:(現)大阪市立大学理学部地学教室

• 橋爪 伝

  箕輪町立箕輪北小学校

• 酒井 均

  東京大学海洋研究所

書誌事項

タイトル別名

• Seasonal variation in chemical and isotopic compositions of Kashio brines and its interpretation
• カシオ チイキ ニ ユウシュツスル エ

抄録

Kashio brines in the deep mountain area in the central Honshu have been noted for the high salinity, the non-meteoric δ¹⁸O and δ²H values of water, and its close relation to the Median Tectonic Line, the largest fault in Japan. Similar brines discharge in other localities along the fault. The Cl^- content of the brine seasonally varied from 670 to 60 meq/l in harmony with the variations of δ¹⁸O from -2.4 to -8.7‰ and δ²H from -52 to -64‰. The stable isotopic and chemical data indicate that these variations are caused by dilution of ascending deep endmembers with two types of meteoric circulation. The first is a local meteoric circulation directly supplied from precipitation to the drainage basin of Kashio, having δ¹⁸O of -10.5 to -13‰ and δ²H of -72 to -86‰. The second is a circulation whose isotopic values are greater (δ¹⁸O: -9 to -10‰ and δ²H: -60 to -70‰) than the local meteoric water. The enrichment of heavy isotopes in the latter circulation may have resulted from ultra or ion-filtration of deep-circulating water during its passage through sedimentary rocks. A heavy precipitation in the drainage area increased after a few months the proportion of the first meteoric component and decreased that of the second.

収録刊行物

• 地球化学

  地球化学 22 (2), 149-156, 1988

  一般社団法人日本地球化学会

詳細情報

• CRID: 1390282680719838464
• NII論文ID: 110008679822
• NII書誌ID: AN00141280
• DOI: 10.14934/chikyukagaku.22.149
• ISSN: 21885923
• ISSN: 03864073
• NDL書誌ID: 3216814
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I3216814
• 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