A quantification of the input of deep carbon to the Earth's surface is crucial to understand the carbon budget and carbon biogeochemical processes in active volcanic zone (Caudron et al., 2012;Chiodini et al., 2020;Rivé et al., 2013). It is commonly known that the volcanic eruptions would release a large amount of CO 2 into the atmosphere, which can regulate the climate at the geological timescales (Berner & Caldeira, 1997;Hilton & West, 2020). Recently, it has been recognized that