Journal Highlights

Bubble formation and decrepitation control the CO2 content of olivine-hosted melt inclusions

Editors’ Highlight—CO2 contents of melt inclusions (MI's) in erupted minerals can be used to estimate that depth of magma emplacement and fractionation before volcanic eruptions (among other processes). But, in the past few years, quite a few studies have begun to dig deeper into the types of processes that take place after trapping and that affect the volatile contents. Overall, these studies have sought to illuminate how post-entrapment processes affect volatiles in these inclusions in order to design strategies to circumvent obstacles to obtaining good depth estimates (e.g. Raman analysis of bubbles, re-hydration experiments, etc.) This paper raises new and fundamental questions about how MI behave after trapping, and whether certain processes effect irreversible changes to the MI, such that important information on volatile contents and depths are irrevocably lost. The author provides a global synthesis, as well as detailed examples from Iceland, and a suite of new and robust numerical models for these processes.