Weaker axially dipolar time-averaged paleomagnetic field based on multidomain-corrected paleointensities from Galapagos lavas
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- Huapei Wang
- Earth and Planetary Sciences, Rutgers University, Piscataway, NJ 08854;
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- Dennis V. Kent
- Earth and Planetary Sciences, Rutgers University, Piscataway, NJ 08854;
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- Pierre Rochette
- Aix-Marseille Université, CNRS, IRD, CEREGE UM34, 13545 Aix en Provence, France
書誌事項
- 公開日
- 2015-11-23
- 権利情報
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- http://www.pnas.org/site/misc/userlicense.xhtml
- DOI
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- 10.1073/pnas.1505450112
- 公開者
- Proceedings of the National Academy of Sciences
この論文をさがす
説明
<jats:title>Significance</jats:title> <jats:p>Our multidomain-corrected paleointensity results from near-equatorial lavas from the Galapagos give a mean intensity only about one-half of that obtained from the only robust published result from near-polar lavas from Antarctica. This new evidence is consistent with the factor-of-2 equator-to-pole paleointensity signature of a geocentric axial dipole field and also indicates that the time-averaged field is considerably weaker than the present-day field. The resulting dipole moment provides a new calibration standard for cosmogenic isotope production rates and suggests that the present decrease in geomagnetic field intensity may simply be a return to a more average magnitude rather than a harbinger of a polarity reversal.</jats:p>
収録刊行物
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- Proceedings of the National Academy of Sciences
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Proceedings of the National Academy of Sciences 112 (49), 15036-15041, 2015-11-23
Proceedings of the National Academy of Sciences
