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Earth and Planetary Science Letters, 2018 Long-term variations of the geomagnetic dipole moment (GDM) during periods of stable polarity and in transitional states (reversals and excursions) provide key information for understanding the geodynamo regime. Following several studies dealing with the Brunhes chron and the Matuyama–Brunhes transition, this study presents a new authigenic 10 Be/ 9 Be
Quentin Simon +2 more
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Geomagnetic field stability: Reversal events and excursions
Earth and Planetary Science Letters, 1994Abstract It has been suggested that there are several reverse subchrons in the Brunhes, and this suggestion is gaining some acceptance. However, such a suggestion has fundanmental implications for the reversal process, because it implies that the reverse polarity state has been substantially less stable than the normal polarity state during the ...
R.T. Merrill, P.L. McFadden
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Behaviour of the Geomagnetic Field during Reversals and Excursions
Moscow University Physics Bulletin (English Translation of Vestnik Moskovskogo Universiteta, Fizika)M Yu Reshetnyak, Reshetnyak M Yu
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TIMING OF QUATERNARY GEOMAGNETIC REVERSALS AND EXCURSIONS IN VOLCANIC AND SEDIMENTARY ARCHIVES
Geological Society of America Abstracts with Programs, 2019Abstract We review the ages of Quaternary magnetic polarity reversals and magnetic excursions. Improvements in radioisotopic 40Ar/39Ar dating of reversals and excursions reflect the use of multi-collector mass spectrometers, along with ultra-low backgrounds, laser-based incremental heating methods, and adoption of 28.201 Ma for the Fish Canyon ...
J.E.T. Channell, B.S. Singer, B.R. Jicha
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Earth and Planetary Science Letters, 2008
Abstract Fuller (Fuller, M., Geomagnetic field intensity, excursions, reversals and the 41,000-yr obliquity signal, Earth Planet. Sci. Lett. 245 (2006) 605–615.) pointed out that, for 9 reversals over the last 3 Myr, reversal age has a non-random relationship to the phase of orbital obliquity.
Chuang Xuan, J E T Channell
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Abstract Fuller (Fuller, M., Geomagnetic field intensity, excursions, reversals and the 41,000-yr obliquity signal, Earth Planet. Sci. Lett. 245 (2006) 605–615.) pointed out that, for 9 reversals over the last 3 Myr, reversal age has a non-random relationship to the phase of orbital obliquity.
Chuang Xuan, J E T Channell
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Geophysical Journal InternationalSUMMARY We investigate the effect of statistically non-stationary turbulence in the Earth’s outer core on the effective turbulent electromotive force generated by the convectively driven flow of liquid iron and the evolution characteristics of the geomagnetic field.
Krzysztof A Mizerski
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Journal of Geophysical Research: Solid EarthAbstract The turbulence in the liquid iron within the outer core of the Earth is responsible for the geomagnetic field generation, its sustainment and dynamical evolution. Here we revive Braginsky's idea of the Stratified Ocean at the top of the Core (SOC) and consider a non‐stationary turbulent wave field composed of Magnetic ...
Krzysztof A Mizerski
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Self-reversal explanation for the Laschamp/Olby geomagnetic field excursion
Physics of the Earth and Planetary Interiors, 1982Abstract The reversed natural remanent magnetisation (NRM) of the volcanic features at Laschamp and Olby (Chaine des Puys, Auvergne, France) is commonly believed to document the youngest excursion of the geomagnetic field during the present Brunhes epoch. Recent radiometric dating determines the age of these lavas to be 35000–45000 y.
Friedrich Heller, Nikolai Petersen
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2021
<p>The geomagnetic field is commonly approximated to a geocentric tilted dipole. However, a next step in the approach of the geomagnetic field is the eccentric dipole which takes the first and second terms of the spherical harmonic representation of the geomagnetic field.
Alicia González-López +5 more
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<p>The geomagnetic field is commonly approximated to a geocentric tilted dipole. However, a next step in the approach of the geomagnetic field is the eccentric dipole which takes the first and second terms of the spherical harmonic representation of the geomagnetic field.
Alicia González-López +5 more
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Physics of the Earth and Planetary Interiors, 2001
We carried out a Thellier paleointensity study of a ∼3.6 million year Pliocene geomagnetic excursion recorded in a lava flow succession from southern Georgia (lesser Caucasus). Previous paleomagnetic study [Phys. Earth Planet. Int. 96 (1996) 41] revealed that several consecutive lava flows record an intermediate polarity direction at the base of the ...
Goguitchaichvili, Avto +2 more
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We carried out a Thellier paleointensity study of a ∼3.6 million year Pliocene geomagnetic excursion recorded in a lava flow succession from southern Georgia (lesser Caucasus). Previous paleomagnetic study [Phys. Earth Planet. Int. 96 (1996) 41] revealed that several consecutive lava flows record an intermediate polarity direction at the base of the ...
Goguitchaichvili, Avto +2 more
openaire +2 more sources