Fig. 3: Degree of decarbonation.
From: Pervasive subduction zone devolatilization recycles CO2 into the forearc

Blue symbols show the observed CO2 loss of each sample whereas green symbols show the maximum potential CO2 loss as a function of initial wt% CO2. a Percent of CO2 released. Nearly pure carbonate rocks degas the smallest proportion of CO2. b The kg CO2 released per kg rock. This shows a peaked distribution, with intermediate-CO2-content rocks degassing the greatest mass of CO2 in both observed and potential datasets.