IDEAS home Printed from https://ideas.repec.org/a/nat/natcom/v8y2017i1d10.1038_s41467-017-00562-z.html
   My bibliography  Save this article

Silicate dissolution boosts the CO2 concentrations in subduction fluids

Author

Listed:
  • S. Tumiati

    (Università degli Studi di Milano)

  • C. Tiraboschi

    (Università degli Studi di Milano Bicocca)

  • D. A. Sverjensky

    (Johns Hopkins University)

  • T. Pettke

    (University of Bern)

  • S. Recchia

    (Università degli Studi dell’Insubria)

  • P. Ulmer

    (Institute of Geochemistry and Petrology)

  • F. Miozzi

    (Università degli Studi di Milano
    Sorbonne Universités – UPMC)

  • S. Poli

    (Università degli Studi di Milano)

Abstract

Estimates of dissolved CO2 in subduction-zone fluids are based on thermodynamic models, relying on a very sparse experimental data base. Here, we present experimental data at 1–3 GPa, 800 °C, and ∆FMQ ≈ −0.5 for the volatiles and solute contents of graphite-saturated fluids in the systems COH, SiO2–COH ( + quartz/coesite) and MgO–SiO2–COH ( + forsterite and enstatite). The CO2 content of fluids interacting with silicates exceeds the amounts measured in the pure COH system by up to 30 mol%, as a consequence of a decrease in water activity probably associated with the formation of organic complexes containing Si–O–C and Si–O–Mg bonds. The interaction of deep aqueous fluids with silicates is a novel mechanism for controlling the composition of subduction COH fluids, promoting the deep CO2 transfer from the slab–mantle interface to the overlying mantle wedge, in particular where fluids are stable over melts.

Suggested Citation

  • S. Tumiati & C. Tiraboschi & D. A. Sverjensky & T. Pettke & S. Recchia & P. Ulmer & F. Miozzi & S. Poli, 2017. "Silicate dissolution boosts the CO2 concentrations in subduction fluids," Nature Communications, Nature, vol. 8(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-00562-z
    DOI: 10.1038/s41467-017-00562-z
    as

    Download full text from publisher

    File URL: https://www.nature.com/articles/s41467-017-00562-z
    File Function: Abstract
    Download Restriction: no
    File URL: https://libkey.io/10.1038/s41467-017-00562-z?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. S. Tumiati & S. Recchia & L. Remusat & C. Tiraboschi & D. A. Sverjensky & C. E. Manning & A. Vitale Brovarone & A. Boutier & D. Spanu & S. Poli, 2022. "Subducted organic matter buffered by marine carbonate rules the carbon isotopic signature of arc emissions," Nature Communications, Nature, vol. 13(1), pages 1-10, December.

    More about this item

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-00562-z. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Sonal Shukla or Springer Nature Abstracting and Indexing (email available below). General contact details of provider: http://www.nature.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.