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	Provedor de dados ArchiMer (4) Autor Almqvist, B (1) Creveling, Jessica R (1) Eriş, Kadir K (1) Hagen, Cedric J (1) Herrero-bervera, E (1) Lougheed, B C (1) Lund, Steve (1) Makaroğlu, Özlem (1) Nowaczyk, Norbert R (1) Obrochta, S (1) Reilly, Brendan T (1) Schwartz, Martha (1) Snowball, I (1) Stoner, Joseph S (1) Stott, Lowell (1) Wiers, S (1) Çağatay, M Namık (1) Mais... Palavra-chave Palaeomagnetic secular variation (4) Palaeomagnetism (3) Geomagnetic excursions (2) Palaeointensity (2) Atlantic Ocean (1) Dynamic programming (1) Magnetic fabrics and anisotropy (1) Magnetostratigraphy (1) Marine magnetics and palaeomagnetics (1) Statistical methods (1) Mais... Tipo do documento Text (4) Ano 2020 (2) 2019 (1) 2017 (1) País France (4) Idioma Inglês (4)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última Coring induced sediment fabrics at IODP Expedition 347 Sites M0061 and M0062 identified by anisotropy of magnetic susceptibility (AMS): criteria for accepting palaeomagnetic data ArchiMer Snowball, I; Almqvist, B; Lougheed, B C; Wiers, S; Obrochta, S; Herrero-bervera, E. Anisotropy of magnetic susceptibility data obtained from discrete sub-samples recovered from two Integrated Ocean Drilling Program sites (Expedition 347 sites M0061 and M0062 in the Baltic Sea) by an Advanced Piston Corer are compared to results obtained on sub-samples recovered by replicate 6 m long Kullenberg piston cores. Characteristic natural remanence directions were obtained from the total of 1097 sub-samples using principal component analyses. The three principal anisotropy axes of sub-samples taken from Advanced Piston Core liners align to the sub-sample axes, with the maximum axis (K1) parallel to the split core surfaces, possibly caused by outwards relaxation of the core-liners after splitting. A second anomalous anisotropy fabric is... Tipo: Text Palavras-chave: Magnetic fabrics and anisotropy; Palaeomagnetic secular variation; Palaeomagnetism. Ano: 2019 URL: https://archimer.ifremer.fr/doc/00481/59233/61937.pdf High-resolution palaeomagnetic record from Sea of Marmara sediments for the last 70 ka ArchiMer Makaroğlu, Özlem; Nowaczyk, Norbert R; Eriş, Kadir K; Çağatay, M Namık. Magnetostratigraphic and geochemical analyses were performed on two sediment cores recovered from the Sea of Marmara to investigate geomagnetic field variations over the last 70 ka. A chronology for each of the two cores was developed from eight AMS 14C datings, tephrochronology, and tuning of Ca concentrations with stadials and interstadials observed in Greenland ice core oxygen isotope data. Based on the age models, cores MD01–2430 and MRS-CS19 reach back to 70 ka and 32 ka, respectively. High average sedimentation rates of 43 cm/kyr for core MD01–2430 and 68 cm/kyr for core MRS-CS19 allow high-resolution reconstruction of geomagnetic field variations for the Sea of Marmara. Mineral magnetic properties are sensitive to glacioeustatic sea-level changes... Tipo: Text Palavras-chave: Geomagnetic excursions; Marine magnetics and palaeomagnetics; Palaeointensity; Palaeomagnetic secular variation; Palaeomagnetism. Ano: 2020 URL: https://archimer.ifremer.fr/doc/00632/74416/74131.pdf Dynamic Time Warping of Paleomagnetic Secular Variation Data ArchiMer Hagen, Cedric J; Reilly, Brendan T; Stoner, Joseph S; Creveling, Jessica R. We present and make publicly available a dynamic programming algorithm to simultaneously align the inclination and declination vector directions of sedimentary paleomagnetic secular variation data.This algorithmgenerates a library of possible alignments through the systematic variation of assumptions about the relative accumulation rate and shared temporal overlap of two or more time-series. The paleomagnetist can then evaluate this library of reproducible and objective alignments using available geologic constraints, statistical methods, and expert knowledge.We apply the algorithm to align previously (visually) correlated medium to high accumulation rate northern North Atlantic Holocene deposits (101– 102 cm/ka) with strong radiocarbon control. The... Tipo: Text Palavras-chave: Palaeomagnetic secular variation; Palaeomagnetism; Magnetostratigraphy; Dynamic programming; Statistical methods; Atlantic Ocean. Ano: 2020 URL: https://archimer.ifremer.fr/doc/00601/71322/69749.pdf Long-term palaeomagnetic secular variation and excursions from the western Equatorial Pacific Ocean (MIS2-4) ArchiMer Lund, Steve; Schwartz, Martha; Stott, Lowell. New palaeomagnetic results are presented for the Pleistocene (MIS2-4) portion of deep-sea core MD98-2181 (MD81; Devao Gulf, Philippine Islands). MD81 is the highest resolution (similar to 50 cm ky-1) palaeomagnetic secular variation (PSV) record for similar to 12-70 ka ever recovered from equatorial latitudes (+/- 15 degrees.). Magnetic studies indicate that MD81 has a stable natural remanence with directional uncertainties (MAD angles) typically less than 3 degrees. We have also recovered a relative palaeointensity estimate from these sediments based on normalization to isothermal remanence. We have correlated our relative palaeointensity record with highresolution relative palaeointensity records from the North Atlantic Ocean. The MD81 ages are always... Tipo: Text Palavras-chave: Geomagnetic excursions; Palaeointensity; Palaeomagnetic secular variation. Ano: 2017 URL: https://archimer.ifremer.fr/doc/00420/53156/55308.pdf Registros recuperados: 4 Primeira ... 1 ... Última

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