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1. Ultrahigh-precision noble gas isotope analyses reveal pervasive subsurface fractionation in hydrothermal systems

   https://doi.org/10.1126/sciadv.adg2566  

   Bekaert, David V.; Barry, Peter H.; Broadley, Michael W.; Byrne, David J.; Marty, Bernard; Ramírez, Carlos J.; de Moor, J. Maarten; Rodriguez, Alejandro; Hudak, Michael R.; Subhas, Adam V.; et al (April 2023, Science Advances)

   Ubiquitous fractionation processes in the subsurface obscure mantle-derived volatile signals in hydrothermal systems. 

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2. Noble Gas Isotopes and Nitrogen Isotopologues Reveal Deep Sources and Subsurface Fractionation in Yellowstone Gases

   https://doi.org/10.1021/acsearthspacechem.4c00349  

   Broadley, Michael_W; Barry, Peter_H; Tyne, Rebecca_L; Bekaert, David_V; Karolyte, Ruta; Hudak, Michael_R; McPaul, Katelyn; Ramirez, Carlos_J; Curtice, J.; Lloyd, Karen_G; et al (March 2025, ACS Earth and Space Chemistry)
3. Frequency shifts in noble-gas comagnetometers

   https://doi.org/10.1103/PhysRevA.100.012502  

   Terrano, W. A.; Meinel, J.; Sachdeva, N.; Chupp, T. E.; Degenkolb, S.; Fierlinger, P.; Kuchler, F.; Singh, J. T. (July 2019, Physical Review A)
4. Investigating Fracture Network Deformation Using Noble Gas Release

   https://doi.org/10.1155/2021/6697819  

   Gardner, W. Payton; Bauer, Stephen J.; Broome, Scott (May 2021, Geofluids)

   Vaselli, Orlando (Ed.)

   We investigate deformation mechanics of fracture networks in unsaturated fractured rocks from subsurface conventional detonation using dynamic noble gas measurements and changes in air permeability. We dynamically measured the noble gas isotopic composition and helium exhalation of downhole gas before and after a large subsurface conventional detonation. These noble gas measurements were combined with measurements of the subsurface permeability field from 64 discrete sampling intervals before and after the detonation and subsurface mapping of fractures in borehole walls before well completion. We saw no observable increase in radiogenic noble gas release from either an isotopic composition or a helium exhalation point of view. Large increases in permeability were observed in 13 of 64 discrete sampling intervals. Of the sampling intervals which saw large increases in flow, only two locations did not have preexisting fractures mapped at the site. Given the lack of noble gas release and a clear increase in permeability, we infer that most of the strain accommodation of the fractured media occurred along previously existing fractures, rather than the creation of new fractures, even for a high strain rate event. These results have significant implications for how we conceptualize the deformation of rocks with fracture networks above the percolation threshold, with application to a variety of geologic and geological engineering problems. 

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5. A whole ocean thermometer from atmospheric noble gas ratios

   https://doi.org/10.22498/pages.31.2.96  

   Shackleton, Sarah (October 2023, Past Global Changes Magazine)