globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2012.05.012
Scopus记录号: 2-s2.0-84878954637
论文题名:
High-resolution paleomagnetic secular variations and relative paleointensity since the Late Pleistocene in southern South America
作者: Lisé-Pronovost A.; St-Onge G.; Gogorza C.; Haberzettl T.; Preda M.; Kliem P.; Francus P.; Zolitschka B.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2013
卷: 71
起始页码: 91
结束页码: 108
语种: 英语
英文关键词: ICDP-project PASADO ; Laguna Potrok Aike ; Paleomagnetism ; Relative paleointensity ; Secular variation ; Southern Hemisphere
Scopus关键词: ICDP-project PASADO ; Laguna potrok aike ; Paleomagnetism ; Relative paleointensity ; Secular variation ; Southern Hemisphere ; Lakes ; Magnetization ; Sedimentology ; Geomagnetism ; geomagnetism ; grain size ; lacustrine deposit ; paleomagnetism ; Pleistocene ; proxy climate record ; reconstruction ; resolution ; secular variation ; Southern Hemisphere ; Argentina ; Laguna Potrok Aike ; Santa Cruz [Argentina] ; South America
英文摘要: Paleomagnetic inclination, declination and relative paleointensity were reconstructed from the sediments of Laguna Potrok Aike in the framework of the International Continental scientific Drilling Program (ICDP) Potrok Aike maar lake Sediment Archive Drilling prOject (PASADO). Here we present the u-channel-based full vector paleomagnetic field reconstruction since 51.2ka cal BP. The relative paleointensity proxy (RPI) was built by normalising the natural remanent magnetisation with the anhysteretic remanent magnetisation using the average ratio at 4 demagnetisation steps part of the ChRM interval (NRM/ARM10-40mT). A grain size influence on the RPI was removed using a correction based on the linear relationship between the RPI and the median destructive field of the natural remanent magnetisation (MDFNRM). The new record is compared with other lacustrine and marine records and stacks from the mid- to high-latitudes of the Southern Hemisphere, revealing consistent millennial-scale variability, the identification of the Laschamp and possibly the Mono Lake geomagnetic excursions, and a direction swing possibly associated to the Hilina Pali excursion at 20ka cal BP. Nonetheless, a global-scale comparison with other high-resolution records located on the opposite side of the Earth and with various dipole field references hint at a different behaviour of the geomagnetic field around southern South America at 46ka cal BP. © 2012 Elsevier Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60616
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作者单位: Canada Research Chair in Marine Geology, Institut des sciences de la mer de Rimouski (ISMER), Université du Québec à Rimouski (UQAR), Rimouski, Canada; GEOTOP Research Center, Canada; Instituto de Física Arroyo Seco, Universidad Nacional del Centro de la Provincia de Buenos Aires, Tandil, Argentina; Physical Geography, Friedrich-Schiller-University Jena, Jena, Germany; Département des sciences de la Terre et de l'atmosphère, Université du Québec à Montréal (UQAM), Montréal, Canada; Geomorphology and Polar Research (GEOPOLAR), Institute of Geography, University of Bremen, Bremen, Germany; Institut national de la recherche scientifique, Centre Eau, Terre, Environnement (INRS-ETE), Québec, Canada

Recommended Citation:
Lisé-Pronovost A.,St-Onge G.,Gogorza C.,et al. High-resolution paleomagnetic secular variations and relative paleointensity since the Late Pleistocene in southern South America[J]. Quaternary Science Reviews,2013-01-01,71
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