Influence of composition-dependent thermal conductivity on the long-term evolution of primordial reservoirs in Earth's lower mantle
Abstract The influence of composition-dependent thermal conductivity and heterogeneous internal heating of primordial dense material on the long-term evolution of primordial reservoirs in the lower mantle of the Earth is investigated utilizing thermochemical mantle convection simulations in a 2-D sp...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2022-03-01
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| Series: | Earth, Planets and Space |
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| Online Access: | https://doi.org/10.1186/s40623-022-01608-3 |
| _version_ | 1818353628945055744 |
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| author | Yang Li Frédéric Deschamps Zhidong Shi Joshua M. Guerrero Wen-Pin Hsieh Liang Zhao Paul J. Tackley |
| author_facet | Yang Li Frédéric Deschamps Zhidong Shi Joshua M. Guerrero Wen-Pin Hsieh Liang Zhao Paul J. Tackley |
| author_sort | Yang Li |
| collection | DOAJ |
| description | Abstract The influence of composition-dependent thermal conductivity and heterogeneous internal heating of primordial dense material on the long-term evolution of primordial reservoirs in the lower mantle of the Earth is investigated utilizing thermochemical mantle convection simulations in a 2-D spherical annulus geometry. Our results show that a reduction in the thermal conductivity of primordial dense material due to iron enrichment does not substantially alter mantle dynamics nor the long-term stability of the reservoirs of this dense material. If the primordial dense material is also enriched in heat-producing elements, the average altitude of these reservoirs slightly increases as the thermal conductivity is reduced, therefore, covering smaller core–mantle boundary areas. Our study indicates that the composition-dependent thermal conductivity of primordial material plays a second order role in the long-term evolution of Earth's mantle. Graphical Abstract |
| first_indexed | 2024-12-13T19:12:34Z |
| format | Article |
| id | doaj.art-6d424546d1434607bf499e0f55daf72b |
| institution | Directory Open Access Journal |
| issn | 1880-5981 |
| language | English |
| last_indexed | 2024-12-13T19:12:34Z |
| publishDate | 2022-03-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Earth, Planets and Space |
| spelling | doaj.art-6d424546d1434607bf499e0f55daf72b2022-12-21T23:34:22ZengSpringerOpenEarth, Planets and Space1880-59812022-03-0174111310.1186/s40623-022-01608-3Influence of composition-dependent thermal conductivity on the long-term evolution of primordial reservoirs in Earth's lower mantleYang Li0Frédéric Deschamps1Zhidong Shi2Joshua M. Guerrero3Wen-Pin Hsieh4Liang Zhao5Paul J. Tackley6State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Institutions of Earth Science, Chinese Academy of SciencesInstitute of Earth Sciences, Academia SinicaState Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Institutions of Earth Science, Chinese Academy of SciencesInstitute of Earth Sciences, Academia SinicaInstitute of Earth Sciences, Academia SinicaState Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Institutions of Earth Science, Chinese Academy of SciencesInstitute of Geophysics, Department of Earth Sciences, ETH ZürichAbstract The influence of composition-dependent thermal conductivity and heterogeneous internal heating of primordial dense material on the long-term evolution of primordial reservoirs in the lower mantle of the Earth is investigated utilizing thermochemical mantle convection simulations in a 2-D spherical annulus geometry. Our results show that a reduction in the thermal conductivity of primordial dense material due to iron enrichment does not substantially alter mantle dynamics nor the long-term stability of the reservoirs of this dense material. If the primordial dense material is also enriched in heat-producing elements, the average altitude of these reservoirs slightly increases as the thermal conductivity is reduced, therefore, covering smaller core–mantle boundary areas. Our study indicates that the composition-dependent thermal conductivity of primordial material plays a second order role in the long-term evolution of Earth's mantle. Graphical Abstracthttps://doi.org/10.1186/s40623-022-01608-3Mantle dynamicsThermal conductivityLower mantlePrimordial reservoirsThermo-chemical mantle convection |
| spellingShingle | Yang Li Frédéric Deschamps Zhidong Shi Joshua M. Guerrero Wen-Pin Hsieh Liang Zhao Paul J. Tackley Influence of composition-dependent thermal conductivity on the long-term evolution of primordial reservoirs in Earth's lower mantle Earth, Planets and Space Mantle dynamics Thermal conductivity Lower mantle Primordial reservoirs Thermo-chemical mantle convection |
| title | Influence of composition-dependent thermal conductivity on the long-term evolution of primordial reservoirs in Earth's lower mantle |
| title_full | Influence of composition-dependent thermal conductivity on the long-term evolution of primordial reservoirs in Earth's lower mantle |
| title_fullStr | Influence of composition-dependent thermal conductivity on the long-term evolution of primordial reservoirs in Earth's lower mantle |
| title_full_unstemmed | Influence of composition-dependent thermal conductivity on the long-term evolution of primordial reservoirs in Earth's lower mantle |
| title_short | Influence of composition-dependent thermal conductivity on the long-term evolution of primordial reservoirs in Earth's lower mantle |
| title_sort | influence of composition dependent thermal conductivity on the long term evolution of primordial reservoirs in earth s lower mantle |
| topic | Mantle dynamics Thermal conductivity Lower mantle Primordial reservoirs Thermo-chemical mantle convection |
| url | https://doi.org/10.1186/s40623-022-01608-3 |
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