Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

How do volcanoes produce carbon dioxide?

  1. Apr 18, 2016 #1
    I am just curious where this gas comes from when volcanoes erupt.
     
  2. jcsd
  3. Apr 18, 2016 #2

    SteamKing

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper

    It comes from the geological carbon cycle:

    https://en.wikipedia.org/wiki/Carbon_cycle

    Much carbon is stored in the form of carbonate rocks, like limestone. When these rocks are subducted by tectonic activity into the mantle and metamorphized, the carbon they contain is released in the form of CO2, which can re-enter the atmosphere later through volcanic eruptions.
     
  4. Apr 18, 2016 #3

    DrDu

    User Avatar
    Science Advisor

    The lava in volcanoes is generated when e.g. crust material is molten during subduction of crust. This crust may contain CaCO3 etc and other carbonates. Unter high temperature, it will react with silica, alumina etc to form feldspar and carbon dioxide. Simplified: CaCO3 +SiO2 -> CaSiO3 + CO2.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: How do volcanoes produce carbon dioxide?
Loading...