Nonlinearity of the post-spinel transition and its expression in slabs and plumes worldwide
Abstract Phase transitions in the mantle control its internal dynamics and structure. The post-spinel transition marks the upper–lower mantle boundary, where ringwoodite dissociates into bridgmanite plus ferropericlase, and its Clapeyron slope regulates mantle flow across it. This interaction has pr...
Saved in:
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2025-01-01
|
| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-025-56231-z |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832585577985212416 |
|---|---|
| author | Junjie Dong Rebecca A. Fischer Lars P. Stixrude Matthew C. Brennan Kierstin Daviau Terry-Ann Suer Katlyn M. Turner Yue Meng Vitali B. Prakapenka |
| author_facet | Junjie Dong Rebecca A. Fischer Lars P. Stixrude Matthew C. Brennan Kierstin Daviau Terry-Ann Suer Katlyn M. Turner Yue Meng Vitali B. Prakapenka |
| author_sort | Junjie Dong |
| collection | DOAJ |
| description | Abstract Phase transitions in the mantle control its internal dynamics and structure. The post-spinel transition marks the upper–lower mantle boundary, where ringwoodite dissociates into bridgmanite plus ferropericlase, and its Clapeyron slope regulates mantle flow across it. This interaction has previously been assumed to have no lateral spatial variations, based on the assumption of a linear post-spinel boundary in pressure and temperature. Here we present laser-heated diamond anvil cell experiments with synchrotron X-ray diffraction to better constrain this boundary, especially at higher temperatures. Combining our data with results from the literature, and using a global analysis based on machine learning, we find a pronounced nonlinearity in the post-spinel boundary, with its slope ranging from –4 MPa/K at 2100 K, to –2 MPa/K at 1950 K, and to 0 MPa/K at 1600 K. Changes in temperature over time and space can therefore cause the post-spinel transition to have variable effects on mantle convection and the movement of subducting slabs and upwelling plumes. |
| format | Article |
| id | doaj-art-8f76dffd44d6477dbbfabeaa07e22b24 |
| institution | Kabale University |
| issn | 2041-1723 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj-art-8f76dffd44d6477dbbfabeaa07e22b242025-01-26T12:41:11ZengNature PortfolioNature Communications2041-17232025-01-011611910.1038/s41467-025-56231-zNonlinearity of the post-spinel transition and its expression in slabs and plumes worldwideJunjie Dong0Rebecca A. Fischer1Lars P. Stixrude2Matthew C. Brennan3Kierstin Daviau4Terry-Ann Suer5Katlyn M. Turner6Yue Meng7Vitali B. Prakapenka8Department of Earth and Planetary Sciences, Harvard University, CambridgeDepartment of Earth and Planetary Sciences, Harvard University, CambridgeDepartment of Earth, Planetary, and Space Sciences, University of California, Los AngelesDepartment of Earth and Planetary Sciences, Harvard University, CambridgeDepartment of Earth and Planetary Sciences, Harvard University, CambridgeDepartment of Earth and Planetary Sciences, Harvard University, CambridgeDepartment of Earth and Planetary Sciences, Harvard University, CambridgeHigh Pressure Collaborative Access Team (HPCAT), X-Ray Science Division, Argonne National LaboratoryCenter for Advanced Radiation Sources, University of ChicagoAbstract Phase transitions in the mantle control its internal dynamics and structure. The post-spinel transition marks the upper–lower mantle boundary, where ringwoodite dissociates into bridgmanite plus ferropericlase, and its Clapeyron slope regulates mantle flow across it. This interaction has previously been assumed to have no lateral spatial variations, based on the assumption of a linear post-spinel boundary in pressure and temperature. Here we present laser-heated diamond anvil cell experiments with synchrotron X-ray diffraction to better constrain this boundary, especially at higher temperatures. Combining our data with results from the literature, and using a global analysis based on machine learning, we find a pronounced nonlinearity in the post-spinel boundary, with its slope ranging from –4 MPa/K at 2100 K, to –2 MPa/K at 1950 K, and to 0 MPa/K at 1600 K. Changes in temperature over time and space can therefore cause the post-spinel transition to have variable effects on mantle convection and the movement of subducting slabs and upwelling plumes.https://doi.org/10.1038/s41467-025-56231-z |
| spellingShingle | Junjie Dong Rebecca A. Fischer Lars P. Stixrude Matthew C. Brennan Kierstin Daviau Terry-Ann Suer Katlyn M. Turner Yue Meng Vitali B. Prakapenka Nonlinearity of the post-spinel transition and its expression in slabs and plumes worldwide Nature Communications |
| title | Nonlinearity of the post-spinel transition and its expression in slabs and plumes worldwide |
| title_full | Nonlinearity of the post-spinel transition and its expression in slabs and plumes worldwide |
| title_fullStr | Nonlinearity of the post-spinel transition and its expression in slabs and plumes worldwide |
| title_full_unstemmed | Nonlinearity of the post-spinel transition and its expression in slabs and plumes worldwide |
| title_short | Nonlinearity of the post-spinel transition and its expression in slabs and plumes worldwide |
| title_sort | nonlinearity of the post spinel transition and its expression in slabs and plumes worldwide |
| url | https://doi.org/10.1038/s41467-025-56231-z |
| work_keys_str_mv | AT junjiedong nonlinearityofthepostspineltransitionanditsexpressioninslabsandplumesworldwide AT rebeccaafischer nonlinearityofthepostspineltransitionanditsexpressioninslabsandplumesworldwide AT larspstixrude nonlinearityofthepostspineltransitionanditsexpressioninslabsandplumesworldwide AT matthewcbrennan nonlinearityofthepostspineltransitionanditsexpressioninslabsandplumesworldwide AT kierstindaviau nonlinearityofthepostspineltransitionanditsexpressioninslabsandplumesworldwide AT terryannsuer nonlinearityofthepostspineltransitionanditsexpressioninslabsandplumesworldwide AT katlynmturner nonlinearityofthepostspineltransitionanditsexpressioninslabsandplumesworldwide AT yuemeng nonlinearityofthepostspineltransitionanditsexpressioninslabsandplumesworldwide AT vitalibprakapenka nonlinearityofthepostspineltransitionanditsexpressioninslabsandplumesworldwide |