Browsing Статьи, тезисы докладов by Author "Takahata N."

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Diffusive fractionation of noble gases in mantle with magma channels: Origin of low He/Ar in mantle-derived rocks

Yamamoto J.; Nishimura K.; Sugimoto T.; Takemura K.; Takahata N.; Sano Y. (2009)

By crushing olivine and pyroxene phenocrysts in volcanic rocks from Kyushu Island, Japan, we determined 3He/4He of 3–7 Ra and 40Ar/36Ar of up to 1750. These values are lower than those of MORB. 4He/40Ar⁎ (down to 0.1) is ...

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