Magnetic susceptibility dataset from the early Givetian to early Frasnian in the La Thure section

Recent advances in radiometric dating result in significant improvements in the geological timescale and provide better insight into the timing of various processes and evolutions within the Earth's system. However, no radiometric ages are contained within the Givetian. Consequently, the absolute ages of the Givetian Stage boundaries, as well as the stage's duration, remain poorly constrained. As an alternative, the analysis of sedimentary cycles allows for the estimation of the duration of this stage. We examined the high-resolution magnetic susceptibility signals of four Givetian outcrops in... Mehr ...

Verfasser: De Vleeschouwer, David
Boulvain, Frédéric
Da Silva, Anne-Christine
Pas, Damien
Labaye, Corentin
Claeys, Philippe
Dokumenttyp: Dataset
Erscheinungsdatum: 2015
Verlag/Hrsg.: PANGAEA
Schlagwörter: Belgium / Kappabridge / AGICO KLY-3 / La_Thure_Quarry / OUTCROP / Outcrop sample / SECTION / height / Susceptibility / specific
Sprache: Englisch
Permalink: https://search.fid-benelux.de/Record/base-27365122
Datenquelle: BASE; Originalkatalog
Powered By: BASE
Link(s) : https://doi.pangaea.de/10.1594/PANGAEA.855764

Recent advances in radiometric dating result in significant improvements in the geological timescale and provide better insight into the timing of various processes and evolutions within the Earth's system. However, no radiometric ages are contained within the Givetian. Consequently, the absolute ages of the Givetian Stage boundaries, as well as the stage's duration, remain poorly constrained. As an alternative, the analysis of sedimentary cycles allows for the estimation of the duration of this stage. We examined the high-resolution magnetic susceptibility signals of four Givetian outcrops in the Givet area for a possible astronomical imprint, to fully understand the rates of evolutionary and environmental change. All four sections are firmly correlated and wavelet analyses of the magnetic susceptibility signals reveal the imprint of astronomical eccentricity forcing. The highly stable 405 kyr cycles constrain the duration of the Givetian Stage at 4.35±0.45 Myr, which is in good agreement with the International Chronostratigraphic Chart (5.0 Myr). The studied sections also exhibit an imprint of obliquity, suggesting a climatic teleconnection between low and high latitudes. The corresponding microfacies curves demonstrate similar astronomical imprint, and thereby indicate that the observed 10**5 year-scale cyclicity is the result of climatic and environmental change.