日本海海水中のヘリウム同位体比

佐野 有司, 脇田 宏, 石橋 純一郎, 蒲生 俊敬, 酒井 均

doi:10.14934/chikyukagaku.23.61

書誌事項

タイトル別名

Helium isotope ratios in Japan Sea water
ニホンカイカイスイチュウノヘリウムドウイタイヒ

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説明

We have measured ³He/⁴He and ⁴He/²⁰Ne ratios, and ⁴He concentrations in water samples collected at several depths in the eastern Japan Sea. Observed ³He/⁴He and ⁴He/²⁰Ne ratios vary from 1.006R_atm (where R_atm is atmospheric ratio of 1.343×10^-6) to 1.045 R_atm and from 0.24 to 0.31, respectively. There is a difference in ⁴He concentration between in the samples shallower than 1,500m and those deeper than 2,000m. The discrepancy may be related to the existence of two water masses in the Japan Sea suggested by Gamo and Horibe (1983). Excess ³He in the shallower samples is attributable to tritium decay in the sea water while that in the deeper samples is not. Emanation of mantle helium is suggested in the Japan Sea bottom. Since the number of present data is small, extensive ³He/⁴He research should be carried out in future to verify the existence of mantle helium in the Jpan Sea.

収録刊行物

地球化学

地球化学 23 (2), 61-67, 1989-12-30

一般社団法人日本地球化学会

詳細情報詳細情報について

CRID: 1390001205742441472

NII論文ID: 110008679830

NII書誌ID: AN00141280

DOI: 10.14934/chikyukagaku.23.61

ISSN: 21885923; 03864073

NDL書誌ID: 3649685

Web Site: http://id.ndl.go.jp/bib/3649685; https://ndlsearch.ndl.go.jp/books/R000000004-I3649685

本文言語コード: ja

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