Dataset Information

Persistence and origin of the lunar core dynamo.

ABSTRACT: The lifetime of the ancient lunar core dynamo has implications for its power source and the mechanism of field generation. Here, we report analyses of two 3.56-Gy-old mare basalts demonstrating that they were magnetized in a stable and surprisingly intense dynamo magnetic field of at least ~13 ?T. These data extend the known lifetime of the lunar dynamo by ~160 My and indicate that the field was likely continuously active until well after the final large basin-forming impact. This likely excludes impact-driven changes in rotation rate as the source of the dynamo at this time in lunar history. Rather, our results require a persistent power source like precession of the lunar mantle or a compositional convection dynamo.

SUBMITTER: Suavet C

PROVIDER: S-EPMC3666739 | biostudies-literature | 2013 May

REPOSITORIES: biostudies-literature

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Persistence and origin of the lunar core dynamo.

Suavet Clément C Weiss Benjamin P BP Cassata William S WS Shuster David L DL Gattacceca Jérôme J Chan Lindsey L Garrick-Bethell Ian I Head James W JW Grove Timothy L TL Fuller Michael D MD

Proceedings of the National Academy of Sciences of the United States of America 20130506 21

The lifetime of the ancient lunar core dynamo has implications for its power source and the mechanism of field generation. Here, we report analyses of two 3.56-Gy-old mare basalts demonstrating that they were magnetized in a stable and surprisingly intense dynamo magnetic field of at least ~13 μT. These data extend the known lifetime of the lunar dynamo by ~160 My and indicate that the field was likely continuously active until well after the final large basin-forming impact. This likely exclude ...[more]

PMID: 23650386

Dataset Information

Persistence and origin of the lunar core dynamo.

Publications

Persistence and origin of the lunar core dynamo.

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