2021 Annual Meeting of Japan Association of Mineralogical Sciences (JAMS)

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Oral presentation

S1, S4: Earth materials science related to igneous processes and plate convergence region (Joint Special Session)

Fri. Sep 17, 2021 2:00 PM - 4:45 PM Zoom Session 3

Chairperson:DYUTI PRAKASH SARKAR(Hiroshima Uni.), Morihisa Hamada(Japan Agency for Marine-Earth Science and Technology)

4:00 PM - 4:15 PM

[S1,S4-07] Diffusive fractionation of carbon isotopes in rhyolitic melt

*Akira Kawahara1, shumpei Yoshimura1 (1. Hokkaido Uni. sci. )

Keywords:CO2, Diffusive fractionation, silicic melt

We measured diffusivity of 12CO2 and 13CO2 in dry and hydrous rhyolitic melts. We found that significant diffusive fractionation occurred between 12CO2 and 13CO2 in hydrous rhyolitic melts, while it did not occur in dry melts.