3He and methane in Sakurajima Caldera, Kagoshima Bay, Japan

Details 3He and methane in Sakurajima Caldera, Kagoshima Bay, Japan 3He and methane in Sakurajima Caldera, Kagoshima Bay, Japan

May 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994e%26psl.123..221c&link_type=abstract

Earth and Planetary Science Letters, Volume 123, Issue 1-3, p. 221-226.

Physics

2

Scientific paper

Volcanic gases from the submerged caldera of Sakurajima Volcano are characterized by 3He/4He = 6.1RA, CH4/3He ~ 109, and a ratio of excess ΣCO2 to 3He of 140 × 109. Helium in the Kagoshima Bay waters is a mixture of volcanic helium and atmospheric-solubility helium in surface waters, and provides a strong signature for seawater injected into the protocaldera by flow through the volcanic edifice, the probable source of the warm deep water that replaces the colder, more saline deep water of the North Basin in November.
Present address: Department of Marine Science, Tokai University, Shimizu 424, Japan

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