Reevaluating the evidence for a Hadean-Eoarchean dynamo
Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). The time of origin of the geodynamo has impor...
| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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American Association for the Advancement of Science (AAAS)
2021
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| Online Access: | https://hdl.handle.net/1721.1/133374 |
| _version_ | 1826211057714069504 |
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| author | Borlina, Cauê S Weiss, Benjamin P Lima, Eduardo A Tang, Fengzai Taylor, Richard JM Einsle, Joshua F Harrison, Richard J Fu, Roger R Bell, Elizabeth A Alexander, Ellen W Kirkpatrick, Heather M Wielicki, Matthew M Harrison, T Mark Ramezani, Jahandar Maloof, Adam C |
| author2 | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences |
| author_facet | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Borlina, Cauê S Weiss, Benjamin P Lima, Eduardo A Tang, Fengzai Taylor, Richard JM Einsle, Joshua F Harrison, Richard J Fu, Roger R Bell, Elizabeth A Alexander, Ellen W Kirkpatrick, Heather M Wielicki, Matthew M Harrison, T Mark Ramezani, Jahandar Maloof, Adam C |
| author_sort | Borlina, Cauê S |
| collection | MIT |
| description | Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). The time of origin of the geodynamo has important implications for the thermal evolution of the planetary interior and the habitability of early Earth. It has been proposed that detrital zircon grains from Jack Hills, Western Australia, provide evidence for an active geodynamo as early as 4.2 billion years (Ga) ago. However, our combined paleomagnetic, geochemical, and mineralogical studies on Jack Hills zircons indicate that most have poor magnetic recording properties and secondary magnetization carriers that postdate the formation of the zircons. Therefore, the existence of the geodynamo before 3.5 Ga ago remains unknown. |
| first_indexed | 2024-09-23T15:00:12Z |
| format | Article |
| id | mit-1721.1/133374 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T15:00:12Z |
| publishDate | 2021 |
| publisher | American Association for the Advancement of Science (AAAS) |
| record_format | dspace |
| spelling | mit-1721.1/1333742023-09-26T19:52:48Z Reevaluating the evidence for a Hadean-Eoarchean dynamo Borlina, Cauê S Weiss, Benjamin P Lima, Eduardo A Tang, Fengzai Taylor, Richard JM Einsle, Joshua F Harrison, Richard J Fu, Roger R Bell, Elizabeth A Alexander, Ellen W Kirkpatrick, Heather M Wielicki, Matthew M Harrison, T Mark Ramezani, Jahandar Maloof, Adam C Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). The time of origin of the geodynamo has important implications for the thermal evolution of the planetary interior and the habitability of early Earth. It has been proposed that detrital zircon grains from Jack Hills, Western Australia, provide evidence for an active geodynamo as early as 4.2 billion years (Ga) ago. However, our combined paleomagnetic, geochemical, and mineralogical studies on Jack Hills zircons indicate that most have poor magnetic recording properties and secondary magnetization carriers that postdate the formation of the zircons. Therefore, the existence of the geodynamo before 3.5 Ga ago remains unknown. 2021-10-27T19:52:25Z 2021-10-27T19:52:25Z 2020 2020-05-08T14:27:05Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/133374 en 10.1126/sciadv.aav9634 Science Advances Creative Commons Attribution NonCommercial License 4.0 https://creativecommons.org/licenses/by-nc/4.0/ application/pdf American Association for the Advancement of Science (AAAS) Science Advances |
| spellingShingle | Borlina, Cauê S Weiss, Benjamin P Lima, Eduardo A Tang, Fengzai Taylor, Richard JM Einsle, Joshua F Harrison, Richard J Fu, Roger R Bell, Elizabeth A Alexander, Ellen W Kirkpatrick, Heather M Wielicki, Matthew M Harrison, T Mark Ramezani, Jahandar Maloof, Adam C Reevaluating the evidence for a Hadean-Eoarchean dynamo |
| title | Reevaluating the evidence for a Hadean-Eoarchean dynamo |
| title_full | Reevaluating the evidence for a Hadean-Eoarchean dynamo |
| title_fullStr | Reevaluating the evidence for a Hadean-Eoarchean dynamo |
| title_full_unstemmed | Reevaluating the evidence for a Hadean-Eoarchean dynamo |
| title_short | Reevaluating the evidence for a Hadean-Eoarchean dynamo |
| title_sort | reevaluating the evidence for a hadean eoarchean dynamo |
| url | https://hdl.handle.net/1721.1/133374 |
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