Iron isotope fractionation and the oxygen fugacity of the mantle.
The oxygen fugacity of the mantle exerts a fundamental influence on mantle melting, volatile speciation, and the development of the atmosphere. However, its evolution through time is poorly understood. Changes in mantle oxidation state should be reflected in the Fe3+/Fe2+ of mantle minerals, and hen...
| Main Authors: | , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
2004
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| _version_ | 1826281341243621376 |
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| author | Williams, H McCammon, C Peslier, A Halliday, A Teutsch, N Levasseur, S Burg, J |
| author_facet | Williams, H McCammon, C Peslier, A Halliday, A Teutsch, N Levasseur, S Burg, J |
| author_sort | Williams, H |
| collection | OXFORD |
| description | The oxygen fugacity of the mantle exerts a fundamental influence on mantle melting, volatile speciation, and the development of the atmosphere. However, its evolution through time is poorly understood. Changes in mantle oxidation state should be reflected in the Fe3+/Fe2+ of mantle minerals, and hence in stable iron isotope fractionation. Here it is shown that there are substantial (1.7 per mil) systematic variations in the iron isotope compositions (delta57/54Fe) of mantle spinels. Spinel delta57/54Fe values correlate with relative oxygen fugacity, Fe3+/sigmaFe, and chromium number, and provide a proxy of changes in mantle oxidation state, melting, and volatile recycling. |
| first_indexed | 2024-03-07T00:27:21Z |
| format | Journal article |
| id | oxford-uuid:7e96a4c2-ac4d-4ba1-9262-8659a7ce487a |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T00:27:21Z |
| publishDate | 2004 |
| record_format | dspace |
| spelling | oxford-uuid:7e96a4c2-ac4d-4ba1-9262-8659a7ce487a2022-03-26T21:11:08ZIron isotope fractionation and the oxygen fugacity of the mantle.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:7e96a4c2-ac4d-4ba1-9262-8659a7ce487aEnglishSymplectic Elements at Oxford2004Williams, HMcCammon, CPeslier, AHalliday, ATeutsch, NLevasseur, SBurg, JThe oxygen fugacity of the mantle exerts a fundamental influence on mantle melting, volatile speciation, and the development of the atmosphere. However, its evolution through time is poorly understood. Changes in mantle oxidation state should be reflected in the Fe3+/Fe2+ of mantle minerals, and hence in stable iron isotope fractionation. Here it is shown that there are substantial (1.7 per mil) systematic variations in the iron isotope compositions (delta57/54Fe) of mantle spinels. Spinel delta57/54Fe values correlate with relative oxygen fugacity, Fe3+/sigmaFe, and chromium number, and provide a proxy of changes in mantle oxidation state, melting, and volatile recycling. |
| spellingShingle | Williams, H McCammon, C Peslier, A Halliday, A Teutsch, N Levasseur, S Burg, J Iron isotope fractionation and the oxygen fugacity of the mantle. |
| title | Iron isotope fractionation and the oxygen fugacity of the mantle. |
| title_full | Iron isotope fractionation and the oxygen fugacity of the mantle. |
| title_fullStr | Iron isotope fractionation and the oxygen fugacity of the mantle. |
| title_full_unstemmed | Iron isotope fractionation and the oxygen fugacity of the mantle. |
| title_short | Iron isotope fractionation and the oxygen fugacity of the mantle. |
| title_sort | iron isotope fractionation and the oxygen fugacity of the mantle |
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