Chemical composition and radioactivity in hokutolite (Plumbian barite) collected at Peito hot spring, Taiwan

Noriyuki Momoshima, Junichi Nita, Yonezo Maeda, Shinji Sugihara, Isamu Shinno, Nobuaki Matsuoka, Chin Wang Huang

研究成果: ジャーナルへの寄稿学術誌査読

21 被引用数 (Scopus)

抄録

Chemical composition and radionuclide concentrations were determined for hokutolite, plumbian barite, collected at Peito hot spring, Taiwan. The hokutolite, precipitated on the surface of the base rock, was scraped into 20 layers from the surface. Barium and Pb were determined by inductively coupled plasma-atomic emission spectroscopy, and 228Ra, 226Ra and 210Pb were determined by γ-ray spectrometry. Comparison of the 228Ra/226Ra activity ratio at the surface of the hokutolite with that of the hot spring water suggests that the hokutolite has been isolated from the stream for 60 years. Significantly low fractions of (Ba, Pb) SO4 and changes in Ba/Pb mole ratio in the middle layers of the hokutolite suggest a change of growth condition at that time. Using the smooth and continuous decline in 228Ra/226Ra activity ratio observed in the upper layers of the hokutolite, the growth rate of 0.17 mm year-1 was estimated.

本文言語英語
ページ(範囲)85-99
ページ数15
ジャーナルJournal of Environmental Radioactivity
37
1
DOI
出版ステータス出版済み - 1月 1 1997

!!!All Science Journal Classification (ASJC) codes

  • 環境化学
  • 廃棄物管理と処理
  • 汚染
  • 健康、毒物学および変異誘発

フィンガープリント

「Chemical composition and radioactivity in hokutolite (Plumbian barite) collected at Peito hot spring, Taiwan」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル