High thermal conductivity of stishovite promotes rapid warming of a sinking slab in Earth's mantle

Hsieh, Wen‐Pin; Marzotto, Enrico; Tsao, Yi‐Chi; Okuchi, Takuo; Lin, Jung‐Fu

doi:10.1016/j.epsl.2022.117477

Cited by 4 publications

(12 citation statements)

References 77 publications

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“…The thermal conductivity of subducting oceanic crust is assumed to be that of an aggregate with 10 vol% pure stishovite that appears after 300 km depth (Text S4 in Supporting Information S1 and (W.‐P. Hsieh et al., 2022)) and 90 vol% dry olivine and ringwoodite in the upper mantle and transition zone, respectively; in the lower mantle it is composed of 60 vol% (Fe,Al)‐bearing bridgmanite, 20 vol% Fe‐bearing new‐hexagonal‐aluminous phase, and 20 vol% stishovite (Text S4 in Supporting Information S1 and (W.‐P. Hsieh et al., 2022)).…”

Section: Discussion and Geophysical Implicationsmentioning

confidence: 99%

“…Hsieh et al., 2022)) and 90 vol% dry olivine and ringwoodite in the upper mantle and transition zone, respectively; in the lower mantle it is composed of 60 vol% (Fe,Al)‐bearing bridgmanite, 20 vol% Fe‐bearing new‐hexagonal‐aluminous phase, and 20 vol% stishovite (Text S4 in Supporting Information S1 and (W.‐P. Hsieh et al., 2022)).…”

Section: Discussion and Geophysical Implicationsmentioning

confidence: 99%

“…Chang et al, 2017), dry ringwoodite at 410-660 km (Marzotto et al, 2020), and an aggregate with 80 vol% (Fe,Al)-bearing bridgmanite and 20 vol% ferropericlase at 660-1,250 km (W.-P. Hsieh et al, 2018), see Text S4 in Supporting Information S1 for details. The thermal conductivity of subducting oceanic crust is assumed to be that of an aggregate with 10 vol% pure stishovite that appears after 300 km depth (Text S4 in Supporting Information S1 and (W.-P. Hsieh et al, 2022)) and 90 vol% dry olivine and ringwoodite in the upper mantle and transition zone, respectively; in the lower mantle it is composed of 60 vol% (Fe,Al)-bearing bridgmanite, 20 vol% Fe-bearing new-hexagonalaluminous phase, and 20 vol% stishovite (Text S4 in Supporting Information S1 and (W.-P. Hsieh et al, 2022)).…”

Section: Numerical Modeling Of the Hydration Effects On The Thermal E...mentioning

confidence: 99%

“…We further conducted numerical simulations to understand how the poorly thermally-conductive hydrous minerals impact the thermal evolution of a sinking slab. The simulation was based on a self-written Matlab code with re-arrangements from the one performed by Marzotto et al (2020) and W.-P. Hsieh et al (2022). Details of our numerical modeling are described in Text S4-S7 of Supporting Information S1.…”

Section: Numerical Modeling Of the Hydration Effects On The Thermal E...mentioning

confidence: 99%

“…see Text S4 in Supporting Information S1 for details. The thermal conductivity of subducting oceanic crust is assumed to be that of an aggregate with 10 vol% pure stishovite that appears after 300 km depth (Text S4 in Supporting Information S1 and (W.-P Hsieh et al, 2022)Hsieh et al, 2022)…”

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Low Thermal Conductivity of Hydrous Phase D Leads to a Self‐Preservation Effect Within a Subducting Slab

et al. 2022

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Section: Discussion and Geophysical Implicationsmentioning

confidence: 99%

Section: Discussion and Geophysical Implicationsmentioning

confidence: 99%

Section: Numerical Modeling Of the Hydration Effects On The Thermal E...mentioning

confidence: 99%

Section: Numerical Modeling Of the Hydration Effects On The Thermal E...mentioning

confidence: 99%

mentioning

confidence: 99%

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Low Thermal Conductivity of Hydrous Phase D Leads to a Self‐Preservation Effect Within a Subducting Slab

et al. 2022

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Small-Scale Heterogeneity and Seismic Anisotropy in the Mid-Mantle: Oceanic Crust versus Meta-Stable Olivine

2022

J. Earth Sci.

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Recycled carbonates elevate the electrical conductivity of deeply subducting eclogite in the Earth’s interior

Jing

Dai

et al. 2023

Commun Earth Environ

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The elevated pressure and temperature conditions encountered by a subducted slab entering the deep Earth can substantially alter the chemical composition and physical properties of recycled carbonates. Carbonate-silicate reactions are believed to have a pivotal role in this process. Here we conduct high temperature and high pressure experiments on carbonated eclogite and measure the electrical conductivity in order to constrain the evolution of geophysical properties and chemical composition in the carbonate-bearing eclogitic slab. We find that the carbonate-silicate reaction elevates the conductivity of carbonated eclogite by cations (e.g., Ca, Mg, Fe) exchange between carbonates and silicate. We propose that carbonate-silicate cations exchange can alter the chemical composition of recycled carbonates, potentially impacting their stability and reducing the solidus temperature of carbonate-bearing systems. Combining thermodynamic calculations with the elevated conductivity in our experiments, we re-evaluate the contribution of recycled carbonates to the Earth mantle geophysical anomalies and obtain the potential carbonate capacity in the subducting slab.

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High thermal conductivity of stishovite promotes rapid warming of a sinking slab in Earth's mantle

Cited by 4 publications

References 77 publications

Low Thermal Conductivity of Hydrous Phase D Leads to a Self‐Preservation Effect Within a Subducting Slab

Low Thermal Conductivity of Hydrous Phase D Leads to a Self‐Preservation Effect Within a Subducting Slab

Small-Scale Heterogeneity and Seismic Anisotropy in the Mid-Mantle: Oceanic Crust versus Meta-Stable Olivine

Recycled carbonates elevate the electrical conductivity of deeply subducting eclogite in the Earth’s interior

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