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Showing 1–17 of 17 results
Advanced filters: Author: Chris Ballentine Clear advanced filters

  • Natural hydrogen is generated through chemical and radioactive processes in the Earth’s crust, and could be an important future clean chemical feedstock and energy resource. This Review examines the processes of geological hydrogen generation, migration, accumulation and preservation that enable the development of exploitable reserves.

    • Chris J. Ballentine
    • Rūta Karolytė
    • Michael C. Daly
    Reviews
    Nature Reviews Earth & Environment
    Volume: 6, P: 342-356

  • The xenon isotopic composition of mantle gases from a natural gas field indicates that heavy noble gases are reintroduced into the mantle at subduction zones — providing an important constraint for future models of convection in the Earth.

    • Greg Holland
    • Chris J. Ballentine
    Research
    Nature
    Volume: 441, P: 186-191

  • Injecting industrial CO2 into deep geological strata could be a safe and economical means of storing it, either dissolved in solution or absorbed by carbonate minerals. Chris Ballentine and colleagues used noble gas and isotope tracers to identify what happens to CO2 in gas fields in North America, China and Europe that provide a natural model of geological storage of anthropogenic CO2 over millennia. They find that dissolution in water is the main mechanism.

    • Stuart M. V. Gilfillan
    • Barbara Sherwood Lollar
    • Chris J. Ballentine
    Research
    Nature
    Volume: 458, P: 614-618

  • Semantic heterogeneity exists regarding terminology for active surveillance (AS) for prostate cancer. A panel of leading specialists in prostate cancer and AS involved in the Movember Foundation's Global Action Plan Prostate Cancer Active Surveillance (GAP3) consortium participated in a consensus-forming project to reach international consensus on definitions of terms related to this management option. This standard terminology could support multidisciplinary communication, reduce the extent of variations in clinical practice and optimize clinical decision making.

    • Sophie M. Bruinsma
    • Monique J. Roobol
    • Sophie Bruinsma
    ReviewsOpen Access
    Nature Reviews Urology
    Volume: 14, P: 312-322

  • Some inert-gas isotopes in Earth's atmosphere can only have come from deep inside the planet. We thought we knew how much gas Earth gives up, and how it does it — but a challenge has emerged to the prevailing model.

    • Chris J. Ballentine
    News & Views
    Nature
    Volume: 449, P: 294-296

  • The cocktail of noble-gas isotopes in an Icelandic rock suggests that the upper mantle does not, and never did, receive gas from a deeper mantle reservoir. This challenges ideas of deep Earth's behaviour and formation. See Letter p.101

    • Chris J. Ballentine
    News & Views
    Nature
    Volume: 486, P: 40-41

  • A modelling study shows that crustal nitrogen from the crystalline basement can reach sufficient concentrations in some sedimentary basins to form a free gas phase, into which helium partitions.

    • Anran Cheng
    • Barbara Sherwood Lollar
    • Chris J. Ballentine
    Research
    Nature
    Volume: 615, P: 94-99

  • Li et al. established a liquid-liquid partition model based on ab initio calculations to reveal that He and Ne strongly fractionate during core-mantle separation, which concludes the primitive volatiles seen in hotspots cannot be from the core.

    • Yunguo Li
    • Lidunka Vočadlo
    • John P. Brodholt
    ResearchOpen Access
    Nature Communications
    Volume: 13, P: 1-9

  • Oceanic crust subduction sequesters substantial amounts of argon in the Earth’s mantle, while atmosphere-derived argon affects only the isotopic composition and not the overall budget, according to geodynamic–geochemical models of mantle convection.

    • Jonathan M. Tucker
    • Peter E. van Keken
    • Chris J. Ballentine
    Research
    Nature Geoscience
    Volume: 15, P: 85-90

  • Science and society are faced with two challenges that are inextricably linked: fossil-fuel energy dependence and rising levels of atmospheric carbon dioxide. Coupling of noble gas and carbon chemistry provides an innovative approach to understanding the deep terrestrial carbon cycle.

    • B. Sherwood Lollar
    • C. J. Ballentine
    Reviews
    Nature Geoscience
    Volume: 2, P: 543-547