Results 191 to 200 of about 2,212 (217)
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Paleointensity determination by a modified thellier method
Physics of the Earth and Planetary Interiors, 1977Abstract It has been frequently observed that the ferromagnetic minerals in volcanic rocks may undergo some physical/chemical changes when they are heated in a laboratory. For paleointensity determinations, it is therefore desirable to use the Thellier method, in which internal consistency of the data assures that such undesirable changes did not ...
Masaru Kono, Naoko Ueno
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Harmonic fluctuations in the relative paleointensity data?
2021<p>The existing relative paleointensity (RPI) database allowed the construction of reliable stacking curves for at least the last 1 Myr. Observed fluctuations in the RPI curves suggest both lithologic/climatic influence or geodynamo processes.
Marcia Ernesto +2 more
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Paleointensity behavior in Barremian–Cenomanian (Cretaceous)
International Journal of Geomagnetism and Aeronomy, 2004Fragmentary knowledge on geomagnetic field intensity in Barremian–Cenomanian stageobtained from sediment rocks is summarized. Three types of periodical variations arerevealed in the paleointensity behavior. The types differ by the amplitude and duration(tens of millennia, hundreds of millennia and more than million years).
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Interactions in rocks and the reliability of paleointensity data
Earth and Planetary Science Letters, 1969Abstract A simple theory of thermoremanent magnetization (TRM) of magnetostatically interacting single-domain grains is presented in this paper. In first approximation, small-field TRM is proportional to applied field and inversely proportional to mean interaction field,Hi.
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The A.R.M. correction method of paleointensity determination
Earth and Planetary Science Letters, 1978Abstract A new method has been developed for recovering paleointensities from igneous rocks which requires only a single heating to the Curie temperature, utilizing partial ARM acquisition measurements before and after the heating to carefully separate distortions of the coercivity spectrum, caused by the heating, from viscous components present in ...
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On improving the selection of Thellier-type paleointensity data
Geochemistry, Geophysics, Geosystems, 2014Lisa Tauxe, Greig A. Paterson, Ron Shaar
exaly