Gas and isotope chemistry of thermal features in Yellowstone National Park, Wyoming

Gases from different thermal areas in Yellowstone National Park exhibit distinct chemical signatures, revealing complex subsurface processes. Unlike previous assumptions, these variations are not solely tied to surface temperatures or feature types but instead reflect underlying lithologies and contributions from magmatic, crustal, and meteoric sources. The study analyzed 130 gas samples and 31 water samples collected between 2003 and 2009, measuring bulk chemistry and isotopic compositions (δ¹⁸O, δD, δ¹³C for CO₂ and methane, helium, neon, and argon). By comparing these findings with previous research, the authors highlight the significance of subsurface geology in shaping gas emissions, offering new insights into Yellowstone's dynamic hydrothermal system.

Bergfeld, D., Lowenstern, J. B., Hunt, A. G., Shanks, W. C. P., & Evans, W. (2011). Gas and isotope chemistry of thermal features in Yellowstone National Park, Wyoming. Scientific Investigations Report. https://doi.org/10.3133/sir20115012