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Showing 1–9 of 9 results
Advanced filters: Author: Jay J. Ague Clear advanced filters

  • Aqueous subduction-zone fluids contain CO2 and methane. New calculations indicate that these fluids also host a wide array of organic carbon species, in concentrations sufficient to influence the deep carbon cycle.

    • Jay J. Ague
    News & Views
    Nature Geoscience
    Volume: 7, P: 860-861

  • Metasedimentary rocks atop the downgoing slab oxidize ascending slab-derived dehydration fluids by removing reduced species, according to petrological analysis of subduction complex metasedimentary rocks and reactive transport modelling.

    • Jay J. Ague
    • Santiago Tassara
    • Timm John
    ResearchOpen Access
    Nature Geoscience
    Volume: 15, P: 320-326

  • The balance between carbonate subduction into the deep Earth and CO2 release through degassing at volcanoes is critical for the carbon cycle. Geochemical analyses of an exhumed subduction zone complex in Greece show that fluid-mediated reactions could liberate significant amounts of carbon from the subducting slab for later release at arc volcanoes.

    • Jay J. Ague
    • Stefan Nicolescu
    Research
    Nature Geoscience
    Volume: 7, P: 355-360

  • Correlation between large igneous province activity and iron formation ages suggests that subducted iron formations may have facilitated mantle plume upwelling in the Archaean and Proterozoic Earth.

    • Duncan S. Keller
    • Santiago Tassara
    • Rajdeep Dasgupta
    Research
    Nature Geoscience
    Volume: 16, P: 527-533

  • Sulfur is one of the key volatiles in Earth’s chemical cycles; however, sulfur speciation, isotopic composition, and flux during the subduction cycle remain unclear. Here, the authors provide direct constraints on subduction zone sulfur recycling from high-pressure rocks and explore implications for arc magmatism.

    • Ji-Lei Li
    • Esther M. Schwarzenbach
    • Xin-Shui Wang
    ResearchOpen Access
    Nature Communications
    Volume: 11, P: 1-12

  • The fate of subducted CO2 remains debated, with estimates mainly from numerical predictions varying from wholesale decarbonation of the shallow subducting slab to massive deep subduction of CO2. Here, the authors present field-based data and show that ~40% to ~65% of the CO2 in subducting crust is released via metamorphic decarbonation reactions at forearc depths.

    • E. M. Stewart
    • Jay J. Ague
    ResearchOpen Access
    Nature Communications
    Volume: 11, P: 1-8