Temporal analysis of d13C CO2 and CO2 efflux in soil gas emissions at Mt. Etna: a new tool for volcano monitoring

Abstract

We monitored the soil gas emission of CO 2

Geochemistry of Thermal and Cold Mineral Water and Gases of the Tien Shan and the Pamir

“…However, the most negative δ 13 C CO2 value (−10‰) may mark the influence of fractionation of C-isotopes between gaseous CO 2 (δ 13 C CO2 = −1‰-−2‰) and dissolved HCO 3 (δ 13 C HCO3 = +7‰) when deep CO 2 reacts with cold groundwaters for a long time. According to several investigations [92,93], given enough contact time between high-pressure dissolved CO 2 and a water temperature of 10 • C to 25 • C, the isotope fractionation factor varies from −9.6 to −8.5‰. The δ 13 C PDB for HCO 3 for these waters is positive and varies from +3.6‰ to +10.7‰ (Table S1).…”

Fractionation processes of δ13C in a soil-shallow groundwater system of a potential CO2 sequestration site: Wandoan, QLD, Australia

“…Many studies on CO 2 and carbon distribution in soil exist and the connection between the soil and groundwater carbon system with respect to δ 13 C fractionation is well established in the literature (Giammanco et al, 2017;Rhino et al 2016;Wang et al, 2015;Wynn, 2007).…”