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The end of the lunar dynamo
| dc.date.accessioned | 2021-09-20T18:21:26Z | |
| dc.date.available | 2021-09-20T18:21:26Z | |
| dc.identifier.uri | https://hdl.handle.net/1721.1/132237 | |
| dc.description.abstract | Copyright © 2020 The Authors. Magnetic measurements of the lunar crust and Apollo samples indicate that the Moon generated a dynamo magnetic field lasting from at least 4.2 until <2.5 billion years (Ga) ago. However, it has been unclear when the dynamo ceased. Here, we report paleomagnetic and 40Ar/39Ar studies showing that two lunar breccias cooled in a near-zero magnetic field (<0.1 μT) at 0.44 ± 0.01 and 0.91 ± 0.11 Ga ago, respectively. Combined with previous paleointensity estimates, this indicates that the lunar dynamo likely ceased sometime between ~1.92 and ~0.80 Ga ago. The protracted lifetime of the lunar magnetic field indicates that the late dynamo was likely powered by crystallization of the lunar core. | en_US |
| dc.language.iso | en | |
| dc.publisher | American Association for the Advancement of Science (AAAS) | en_US |
| dc.relation.isversionof | 10.1126/sciadv.aax0883 | en_US |
| dc.rights | Creative Commons Attribution NonCommercial License 4.0 | en_US |
| dc.rights.uri | https://creativecommons.org/licenses/by-nc/4.0/ | en_US |
| dc.source | Science Advances | en_US |
| dc.title | The end of the lunar dynamo | en_US |
| dc.type | Article | en_US |
| dc.relation.journal | Science Advances | en_US |
| dc.eprint.version | Final published version | en_US |
| dc.type.uri | http://purl.org/eprint/type/JournalArticle | en_US |
| eprint.status | http://purl.org/eprint/status/PeerReviewed | en_US |
| dc.date.updated | 2020-05-08T14:33:32Z | |
| dspace.date.submission | 2020-05-08T14:33:34Z | |
| mit.journal.volume | 6 | en_US |
| mit.journal.issue | 1 | en_US |
| mit.license | PUBLISHER_CC | |
| mit.metadata.status | Authority Work and Publication Information Needed |
