Bulk magnetic domain stability controls paleointensity fidelity

Greig A. Paterson, Adrian R. Muxworthy, Yuhji Yamamoto, Yongxin Pan

doi:10.1073/pnas.1714047114

Bulk magnetic domain stability controls paleointensity fidelity

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Greig A. Paterson

Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;
Adrian R. Muxworthy

Department of Earth Science and Engineering, Imperial College London, London SW7 2AZ, United Kingdom;
Yuhji Yamamoto

Center for Advanced Marine Core Research, Kochi University, Nankoku 783-8502, Japan;
Yongxin Pan

Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;

書誌事項

公開日: 2017-11-29

権利情報

https://creativecommons.org/licenses/by-nc-nd/4.0/

DOI

10.1073/pnas.1714047114

公開者: Proceedings of the National Academy of Sciences

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説明

<jats:title>Significance</jats:title> <jats:p>The strength of the ancient geomagnetic field (paleointensity) is a key tool to observe the evolution of early Earth’s geodynamo, which provided an essential protective barrier for the emergence of life. However, paleointensity data are fraught with difficulties that make understanding the evolution of our planet more challenging. We demonstrate a long-sought-after quantitative relationship between fundamental rock magnetic properties and the fidelity of paleointensity records. This relationship can be used to reject low-fidelity paleointensity records and help resolve controversy that surrounds key questions about the evolution of our planet, such as when did the geodynamo begin, when did the inner core solidify, or how early life may have interacted with the magnetic field.</jats:p>

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Proceedings of the National Academy of Sciences

Proceedings of the National Academy of Sciences 114 (50), 13120-13125, 2017-11-29

Proceedings of the National Academy of Sciences