Radiative heat transfer in a hydrous mantle transition zone

Sylvia Monique Thomas; Craig R. Bina; Steven D. Jacobsen; Alexander F. Goncharov

doi:10.1016/j.epsl.2012.09.035

Radiative heat transfer in a hydrous mantle transition zone

Sylvia Monique Thomas^*, Craig R. Bina, Steven D. Jacobsen, Alexander F. Goncharov

^*Corresponding author for this work

Earth and Planetary Sciences

Research output: Contribution to journal › Article › peer-review

26 Scopus citations

Abstract

The structure and dynamics of Earth's interior depend crucially upon heat flow and thus upon the thermal conductivity of its constituents. We measured optical absorbance spectra of hydrous wadsleyite and hydrous ringwoodite at simultaneous high-pressure and high-temperature conditions up to 26GPa and 823K in order to determine their radiative conductivities and to study the potential influence of hydration in the transition zone on thermal conductivity of the mantle. We report radiative thermal conductivities of 1.5±0.2Wm^-1K^-1 for hydrous wadsleyite and 1.2±0.1Wm^-1K^-1 for hydrous ringwoodite at transition zone conditions. The analytically derived radiative thermal conductivities of anhydrous wadsleyite and ringwoodite are 40% and 33% higher, respectively. The total thermal conductivities, calculated from temperature- and pressure-dependent optical absorption measurements, maintain an energy transmission window in the infrared and visible spectral range at high pressures and temperatures. The results indicate that the mantle transition zone may contribute significantly to heat transfer in the mantle and demonstrate the importance of radiative heat transfer in controlling geodynamic processes in Earth's mantle.

Original language	English (US)
Pages (from-to)	130-136
Number of pages	7
Journal	Earth and Planetary Science Letters
Volume	357-358
DOIs	https://doi.org/10.1016/j.epsl.2012.09.035
State	Published - Dec 1 2012

Funding

This research was supported by the NSF EAR-0748707 (S.D.J.) and EAR-1015239 (A.F.G.), DOE/BES, DOE/NNSA (CDAC) , and by the David and Lucile Packard Foundation . We thank N. Blair for access to the FTIR microscope at Northwestern University, D.J. Frost for help with synthesis of wadsleyite sample Z570, J.R. Smyth for ringwoodite samples from run SZ0104, and D. McInerney for help with the thermal conductivity model. We also acknowledge Y. Fukao, and H. Keppler for discussions.

Keywords

Earth's mantle
Earth's transition zone
Optical absorption spectroscopy
Ringwoodite
Thermal conductivity
Wadsleyite

ASJC Scopus subject areas

Geophysics
Geochemistry and Petrology
Earth and Planetary Sciences (miscellaneous)
Space and Planetary Science

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10.1016/j.epsl.2012.09.035

Cite this

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title = "Radiative heat transfer in a hydrous mantle transition zone",

abstract = "The structure and dynamics of Earth's interior depend crucially upon heat flow and thus upon the thermal conductivity of its constituents. We measured optical absorbance spectra of hydrous wadsleyite and hydrous ringwoodite at simultaneous high-pressure and high-temperature conditions up to 26GPa and 823K in order to determine their radiative conductivities and to study the potential influence of hydration in the transition zone on thermal conductivity of the mantle. We report radiative thermal conductivities of 1.5±0.2Wm-1K-1 for hydrous wadsleyite and 1.2±0.1Wm-1K-1 for hydrous ringwoodite at transition zone conditions. The analytically derived radiative thermal conductivities of anhydrous wadsleyite and ringwoodite are 40% and 33% higher, respectively. The total thermal conductivities, calculated from temperature- and pressure-dependent optical absorption measurements, maintain an energy transmission window in the infrared and visible spectral range at high pressures and temperatures. The results indicate that the mantle transition zone may contribute significantly to heat transfer in the mantle and demonstrate the importance of radiative heat transfer in controlling geodynamic processes in Earth's mantle.",

keywords = "Earth's mantle, Earth's transition zone, Optical absorption spectroscopy, Ringwoodite, Thermal conductivity, Wadsleyite",

author = "Thomas, {Sylvia Monique} and Bina, {Craig R.} and Jacobsen, {Steven D.} and Goncharov, {Alexander F.}",

note = "Funding Information: This research was supported by the NSF EAR-0748707 (S.D.J.) and EAR-1015239 (A.F.G.), DOE/BES, DOE/NNSA (CDAC) , and by the David and Lucile Packard Foundation . We thank N. Blair for access to the FTIR microscope at Northwestern University, D.J. Frost for help with synthesis of wadsleyite sample Z570, J.R. Smyth for ringwoodite samples from run SZ0104, and D. McInerney for help with the thermal conductivity model. We also acknowledge Y. Fukao, and H. Keppler for discussions. ",

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doi = "10.1016/j.epsl.2012.09.035",

language = "English (US)",

volume = "357-358",

pages = "130--136",

journal = "Earth and Planetary Science Letters",

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T1 - Radiative heat transfer in a hydrous mantle transition zone

AU - Thomas, Sylvia Monique

AU - Bina, Craig R.

AU - Jacobsen, Steven D.

AU - Goncharov, Alexander F.

N1 - Funding Information: This research was supported by the NSF EAR-0748707 (S.D.J.) and EAR-1015239 (A.F.G.), DOE/BES, DOE/NNSA (CDAC) , and by the David and Lucile Packard Foundation . We thank N. Blair for access to the FTIR microscope at Northwestern University, D.J. Frost for help with synthesis of wadsleyite sample Z570, J.R. Smyth for ringwoodite samples from run SZ0104, and D. McInerney for help with the thermal conductivity model. We also acknowledge Y. Fukao, and H. Keppler for discussions.

PY - 2012/12/1

Y1 - 2012/12/1

N2 - The structure and dynamics of Earth's interior depend crucially upon heat flow and thus upon the thermal conductivity of its constituents. We measured optical absorbance spectra of hydrous wadsleyite and hydrous ringwoodite at simultaneous high-pressure and high-temperature conditions up to 26GPa and 823K in order to determine their radiative conductivities and to study the potential influence of hydration in the transition zone on thermal conductivity of the mantle. We report radiative thermal conductivities of 1.5±0.2Wm-1K-1 for hydrous wadsleyite and 1.2±0.1Wm-1K-1 for hydrous ringwoodite at transition zone conditions. The analytically derived radiative thermal conductivities of anhydrous wadsleyite and ringwoodite are 40% and 33% higher, respectively. The total thermal conductivities, calculated from temperature- and pressure-dependent optical absorption measurements, maintain an energy transmission window in the infrared and visible spectral range at high pressures and temperatures. The results indicate that the mantle transition zone may contribute significantly to heat transfer in the mantle and demonstrate the importance of radiative heat transfer in controlling geodynamic processes in Earth's mantle.

AB - The structure and dynamics of Earth's interior depend crucially upon heat flow and thus upon the thermal conductivity of its constituents. We measured optical absorbance spectra of hydrous wadsleyite and hydrous ringwoodite at simultaneous high-pressure and high-temperature conditions up to 26GPa and 823K in order to determine their radiative conductivities and to study the potential influence of hydration in the transition zone on thermal conductivity of the mantle. We report radiative thermal conductivities of 1.5±0.2Wm-1K-1 for hydrous wadsleyite and 1.2±0.1Wm-1K-1 for hydrous ringwoodite at transition zone conditions. The analytically derived radiative thermal conductivities of anhydrous wadsleyite and ringwoodite are 40% and 33% higher, respectively. The total thermal conductivities, calculated from temperature- and pressure-dependent optical absorption measurements, maintain an energy transmission window in the infrared and visible spectral range at high pressures and temperatures. The results indicate that the mantle transition zone may contribute significantly to heat transfer in the mantle and demonstrate the importance of radiative heat transfer in controlling geodynamic processes in Earth's mantle.

KW - Earth's mantle

KW - Earth's transition zone

KW - Optical absorption spectroscopy

KW - Ringwoodite

KW - Thermal conductivity

KW - Wadsleyite

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DO - 10.1016/j.epsl.2012.09.035

M3 - Article

AN - SCOPUS:84867615564

SN - 0012-821X

VL - 357-358

SP - 130

EP - 136

JO - Earth and Planetary Science Letters

JF - Earth and Planetary Science Letters

ER -

Radiative heat transfer in a hydrous mantle transition zone

Abstract

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Keywords

ASJC Scopus subject areas

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