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	Provedor de dados ArchiMer (1) Autor Meynadier, Laure (1) Simon, Quentin (1) Thouveny, Nicolas (1) Valet, Jean-pierre (1) Palavra-chave Demagnetization (1) Geomagnetic reversals (1) Magnetization acquisition (1) Rock magnetism (1) Sediment (1) Tipo do documento Text (1) Ano 2016 (1) País France (1) Idioma Inglês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 1 Primeira ... 1 ... Última When and why sediments fail to record the geomagnetic field during polarity reversals ArchiMer Valet, Jean-pierre; Meynadier, Laure; Simon, Quentin; Thouveny, Nicolas. We present four new records of the Matuyama–Brunhes (M–B) reversal from sediments of the Equatorial Indian Ocean, West Equatorial Pacific and North Atlantic Oceans with deposition rates between 2 cm/kyr and 4.5 cm/kyr. The magnetic measurements were performed using 8 cc cubic samples and provided well-defined reverse and normal polarity directions prior and after the last reversal. In three records stepwise demagnetization of the transitional samples revealed a succession of scattered directions instead of a well-defined characteristic component of magnetization. There is no relationship with changes in magnetic mineralogy, magnetic concentration and magnetic grain sizes. This behavior could be caused by weakly magnetized sediment. However the transitional... Tipo: Text Palavras-chave: Geomagnetic reversals; Magnetization acquisition; Rock magnetism; Sediment; Demagnetization. Ano: 2016 URL: https://archimer.ifremer.fr/doc/00347/45868/45561.pdf Registros recuperados: 1 Primeira ... 1 ... Última

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