Útdráttur:

Carbon dioxide is the first volatile to exsolve from magmas as they rise towards the surface. This progressive degassing induces isotopic fractionation, therefore providing an opportunity to track magma degassing. This talk presents carbon isotope results from the 2022 and 2023 Fagradalsfjall eruptions. They show that the source of eruptive CO2 during Litli Hrútur eruption was from fresh, relatively undegassed magma and distinct from that of the extensively degassed magma left after the end of the eruptions. These observations show that samples that are collected prior to, during, and following an eruption like the ones that have occurred in 2022 and 2023 on the Reykjanes peninsula and are rapidly analyzed for ẟ13C values give insights into eruption dynamics, magma supply, and potentially timing of eruption cessation.

Öll velkomin!