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

4:00 PM - 4:15 PM JST(7:00 AM - 7:15 AM UTC)

[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.