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Concentrations of H 2 O and CO 2 in olivine-hosted melt inclusions can be used to estimate crystallization depths for the olivine host. However, the original dissolved CO 2 concentration of melt inclusions at the time of trapping can be difficult to measure directly because in many cases substantial CO 2 is transferred to shrinkage bubbles that form during post-entrapment cooling and crystallization. To investigate this problem, we heated olivine from the 1959 Kīlauea Iki and 1960 Kapoho (Hawai'i) eruptions in a 1-atm furnace to temperatures above the melt inclusion trapping temperature to redissolve the CO 2 in shrinkage bubbles. The measured CO 2 concentrations of the experimentally rehomogenized inclusions (≤590 ppm for Kīlauea Iki [n=10]; ≤880 ppm for Kapoho, with one inclusion at 1863 ppm [n=38]) overlap with values for

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