Fig. 4: Carbon flux.
From: Pervasive subduction zone devolatilization recycles CO2 into the forearc
a The percentage of CO2 degassed along two linear P–T paths. Both paths begin at 310 °C and 1.0 GPa; path A continues through peak field conditions of 525 °C and 1.5 GPa, while path B passes through 550 °C and 2.0 GPa. Paths A and B end at 650 °C and 1.8 or 2.4 GPa, respectively. A sharp pulse of decarbonation is seen around peak-T conditions. b The constructed moles of CO2 subducting globally and the amount of CO2 released at both peak conditions (observed) and up to 650 °C (observed + modeled). The arc volcanic CO2 flux1 is shown for reference.
