Carbon dioxide released from subduction zones by fluid-mediated reactions

Ague, Jay J.; Nicolescu, Stefan

doi:10.1038/ngeo2143

Cited by 295 publications

(221 citation statements)

References 29 publications

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“…Besides H 2 O, CO 2 is a dominant volatile phase commonly observed in metamorphic fluids (Roedder, 1984;Crawford and Hollister, 1986;Diamond, 2001;Kerrick and Connolly, 2001;Yardley and Bodnar, 2014). The knowledge of carbon cycle is of primary importance in climate studies but also in reconstructing geological processes in various environments (Selverstone and Gutzler, 1993;Galvez et al, 2013;Ague and Nicolescu, 2014). The production of CO 2 -rich fluids has been proposed to result from (i) redox reactions or interaction of fluids with carbonaceous material (e.g.…”

Section: Introductionmentioning

confidence: 98%

CO 2 flow during orogenic gravitational collapse: Syntectonic decarbonation and fluid mixing at the ductile-brittle transition (Lavrion, Greece)

et al. 2017

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Section: Introductionmentioning

confidence: 98%

CO 2 flow during orogenic gravitational collapse: Syntectonic decarbonation and fluid mixing at the ductile-brittle transition (Lavrion, Greece)

et al. 2017

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“…As a caveat, Hadean slab temperatures and mineral phase diagrams, such as those in the work of Dasgupta [18], may be somewhat imprecise. We also note that hydrous fluids such as derived from sedimentary mélange are able to extract solid CaCO 3 into solution [105], but it is not evident that this process operated on a large scale in the Hadean or even the early Archaean.…”

Section: (D) Non-standard Gabbroic Mush Ocean With Platesmentioning

confidence: 99%

Terrestrial aftermath of the Moon-forming impact

Sleep

Zahnle

Lupu

2014

Phil. Trans. R. Soc. A.

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Much of the Earth's mantle was melted in the Moon-forming impact. Gases that were not partially soluble in the melt, such as water and CO 2 , formed a thick, deep atmosphere surrounding the post-impact Earth. This atmosphere was opaque to thermal radiation, allowing heat to escape to space only at the runaway greenhouse threshold of approximately 100 W m −2 . The duration of this runaway greenhouse stage was limited to approximately 10 Myr by the internal energy and tidal heating, ending with a partially crystalline uppermost mantle and a solid deep mantle. At this point, the crust was able to cool efficiently and solidified at the surface. After the condensation of the water ocean, approximately 100 bar of CO 2 remained in the atmosphere, creating a solar-heated greenhouse, while the surface cooled to approximately 500 K. Almost all this CO 2 had to be sequestered by subduction into the mantle by 3.8 Ga, when the geological record indicates the presence of life and hence a habitable environment. The deep CO 2 sequestration into the mantle could be explained by a rapid subduction of the old oceanic crust, such that the top of the crust would remain cold and retain its CO 2 . Kinematically, these episodes would be required to have both fast subduction (and hence seafloor spreading) and old crust. Hadean oceanic crust that formed from hot mantle would have been thicker than modern crust, and therefore only old crust underlain by cool mantle lithosphere could subduct. Once subduction started, the basaltic crust would turn into dense eclogite, increasing the rate of subduction. The rapid subduction would stop when the young partially frozen crust from the rapidly spreading ridge entered the subduction zone.

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“…Thus, the study of materials as a function of pressure and temperature almost always lead to the formation of new materials. Carbon dioxide (CO 2 ), one of the most important planetary materials, has been extensively studied in many perspectives not only related to Earth and planetary sciences but also in climate change and materials research [Kelemen and Matter, 2008;Lal, 2009;Litasov et al, 2011;Boates et al, 2011Boates et al, , 2012Yoo et al, 2011;Yoo, 2013;Teweldebrhan et al, 2013;Ague and Nicolescu, 2014]. CO 2 is a molecular gas at ambient conditions.…”

Section: Introductionmentioning

confidence: 99%

Stability and properties of liquid CO₂ at high pressure and high temperature: Implications for electrical conductivities in Earth's lower mantle

Tse

Pan

2015

Geophysical Research Letters

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Carbon dioxide (CO2), one of the most important planetary materials, has been the subject of extensive experimental and theoretical studies. However, the stabilities and properties of CO2 at high pressures and temperatures relevant to Earth's mantle and core remain controversial. We have studied the molten structures of CO2‐V with first‐principles molecular dynamic calculations at 60 GPa and different temperatures. The formation of oxygen molecules in the melt is consistent with experimental observations. In particular, the melting transition is accompanying by metallization. The metallic behavior is shown to originate from electron delocalization between oxygen via the overlap of the π orbitals from the dissociated oxygen‐rich species. Metallic molten CO2 is a potential candidate to explain the high conductivities of the Earth's lower mantle. Furthermore, theoretical results do not support the existence of the proposed ionic solid phase of CO2 at high temperature and high pressure.

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Carbon dioxide released from subduction zones by fluid-mediated reactions

Cited by 295 publications

References 29 publications

CO 2 flow during orogenic gravitational collapse: Syntectonic decarbonation and fluid mixing at the ductile-brittle transition (Lavrion, Greece)

CO 2 flow during orogenic gravitational collapse: Syntectonic decarbonation and fluid mixing at the ductile-brittle transition (Lavrion, Greece)

Terrestrial aftermath of the Moon-forming impact

Stability and properties of liquid CO₂ at high pressure and high temperature: Implications for electrical conductivities in Earth's lower mantle

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Carbon dioxide released from subduction zones by fluid-mediated reactions

Cited by 295 publications

References 29 publications

CO 2 flow during orogenic gravitational collapse: Syntectonic decarbonation and fluid mixing at the ductile-brittle transition (Lavrion, Greece)

CO 2 flow during orogenic gravitational collapse: Syntectonic decarbonation and fluid mixing at the ductile-brittle transition (Lavrion, Greece)

Terrestrial aftermath of the Moon-forming impact

Stability and properties of liquid CO2 at high pressure and high temperature: Implications for electrical conductivities in Earth's lower mantle

Contact Info

Product

Resources

About

Stability and properties of liquid CO₂ at high pressure and high temperature: Implications for electrical conductivities in Earth's lower mantle