Lisé-Pronovost, Agathe; St-Onge, Guillaume; Gogorza, Claudia; Haberzettl, Torsten; Preda, Michel; Kliem, Pierre; Francus, Pierre; Zolitschka, Bernd; PASADO Science Team (2013): Age determination and paleomagnetic investigations on a sediment profile from laguna Potrok Aike [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.804602, Supplement to: Lisé-Pronovost, A et al. (2013): High-resolution paleomagnetic secular variations and relative paleointensity since the Late Pleistocene in southern South America. Quaternary Science Reviews, 71(1), 91-108, https://doi.org/10.1016/j.quascirev.2012.05.012
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Abstract:
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 51.2 ka 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/ARM10e40 mT). 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 20 ka 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 46 ka cal BP.
Project(s):
Coverage:
Latitude: -51.900000 * Longitude: -70.380000
Date/Time Start: 2008-09-01T00:00:00 * Date/Time End: 2008-11-30T00:00:00
Event(s):
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
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2 datasets
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Datasets listed in this publication series
- Lisé-Pronovost, A; St-Onge, G; Gogorza, C et al. (2012): Table 1. AMS radiocarbon ages for the PASADO-ICDP site 2 sedimentary record from Laguna Potrok Aike. https://doi.org/10.1594/PANGAEA.804599
- Lisé-Pronovost, A; St-Onge, G; Gogorza, C et al. (2012): High-resolution paleomagnetic secular variation and relative paleointensity since the Late Pleistocene in Southern South America. https://doi.org/10.1594/PANGAEA.804598