Magnetic susceptibility as a high-resolution correlation tool and as a climatic proxy in Paleozoic rocks – Merits and pitfalls: Examples from the Devonian in Belgium

Silva, Anne‐Christine Da; Vleeschouwer, David De; Boulvain, Frédéric; Claeys, Philippe; Fagel, Nathalie; Humblet, Marc; Mabille, Cédric; Michel, Jennifer; Abadi, Mehrdad Sardar; Pas, Damien; Dekkers, Mark J.

doi:10.1016/j.marpetgeo.2013.06.012

Cited by 63 publications

(46 citation statements)

References 76 publications

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“…The 'Monts de Baileux' section (50802 ′ 25 ′′ N, 4823 ′ 37 ′′ E) exposes a succession of strata from the Hanonet Fm to the base of the Mont d'Haurs Fm, and also encompasses the Eifelian -Givetian boundary (Mabille & Boulvain 2008). It has been firmly correlated with the 'La Couvinoise' section based on sedimentology (Mabille & Boulvain 2007) and cyclostratigraphy (figure 10 in Da Silva et al 2013 (Boulvain et al , 2010b, and the correlation to 'Monts de Baileux' is straightforward thanks to the highly parallel MS variations (Fig. 2).…”

Section: Geological Settingmentioning

confidence: 77%

The astronomical calibration of the Givetian (Middle Devonian) timescale (Dinant Synclinorium, Belgium)

Vleeschouwer¹,

Boulvain

Silva

et al. 2014

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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.

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Section: Geological Settingmentioning

confidence: 77%

The astronomical calibration of the Givetian (Middle Devonian) timescale (Dinant Synclinorium, Belgium)

Vleeschouwer¹,

Boulvain

Silva

et al. 2014

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“…The Lompret outcrop is exposed in a recently expanded limestone quarry situated to the northeast of Lompret village, about 10 km west of Frasnes. In this quarry, in the old, now ceased, pit Middle Frasnian limestones of the Bieumont Member (Grands Breux Formation) were quarried (Humblet and Boulvain 2000;Da Silva et al 2013). In the new pit, active since 2011 and located somewhat to the northeast, a greyish limestone body is quarried, also exposing the overlying and fossiliferous Upper Frasnian deposits of the Neuville and Matagne formations.…”

Section: Geographical and Geological Settingmentioning

confidence: 96%

A classic Late Frasnian chondrichthyan assemblage from southern Belgium

Ginter

Gouwy

Goolaerts

2017

Acta Geologica Polonica

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ABSTRACT:Ginter, M., Gouwy, S. and Goolaerts, S. 2017. A classic Late Frasnian chondrichthyan assemblage from southern Belgium. Acta Geologica Polonica, 67 (3), 381-392. Warszawa.Samples from the Upper Frasnian (Devonian) of Lompret Quarry and Nismes railway section in Dinant Synclinorium, southern Belgium, yielded several chondrichthyan teeth and scales. The teeth belong to three genera: Phoebodus, Cladodoides and Protacrodus. The comparison with selected Late Frasnian chondrichthyan assemblages from the seas between Laurussia and Gondwana revealed substantial local differences of taxonomic composition due to palaeoenvironmental conditions, such as depth, distance to submarine platforms, oxygenation of water, and possibly also temperature. The assemblage from Belgium, with its high frequency of phoebodonts, is the most similar to that from the Ryauzyak section, South Urals, Russia, and the Horse Spring section, Canning Basin, Australia.

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“…As mentioned above the influence of climate on MS variations in sediments was demonstrated in Pleistocene sediments by coupling variations in MS with the O-isotope curve (Robinson 1986). In Palaeozoic sediments, this influence is often inferred, and the recent application of spectral analysis on MS records provides convincing evidence of the presence of astronomically driven (Milankovich) cycles in Palaeozoic sections (Rodionov et al 2003;Ellwood et al 2008Ellwood et al , 2011aEllwood et al , b, 2015De Vleeschouwer et al 2012aDa Silva et al 2013;Devleeschouwer et al 2015;Grabowski et al 2015). Identification and counting of climatic cycles of constant duration, identified into MS signals, permit the creation of floating time scales for some parts of the Palaeozoic (Ellwood et al 2007(Ellwood et al , 2011a(Ellwood et al , b, 2015De Vleeschouwer et al 2012aGarcía-Alcalde et al 2012;Da Silva et al 2013).…”

Section: Application Of Ms Records As Palaeoenvironmental and Palaeo-mentioning

confidence: 99%

“…The two sections illustrate very different behaviours, with the Villers section indicating a moderate correlation between MS and Zr content (r ¼ 0.6) and a poor correlation on the Tailfer section (r ¼ 0.3). This suggests that some primary signal was partly preserved in the Villers section, while it was very poorly preserved owing to diagenetic impact at Tailfer (for complete results, see Da Silva et al 2013). † Gamma-ray spectrometry (GRS) measurements are related to the abundance of the three dominant radioactive elements occurring in sedimentary rocks: K, Th and U.…”

Section: Comparison With Other Proxiesmentioning

confidence: 99%

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Magnetic susceptibility application: a window onto ancient environments and climatic variations: foreword

Silva

Whalen

Hladil

et al. 2015

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Magnetic susceptibility (MS) is a powerful tool, which is being applied increasingly on sedimentary rocks to constrain stratigraphic correlations, or as a palaeo-environmental or palaeoclimatic tool. The origin of the magnetic minerals responsible for the variations in MS can be linked to various phenomena such as detrital inputs, pedogenesis, bacterial precipitation or diagenesis. Therefore, it is critical to improve our knowledge of the origin of the MS signal in order to apply it for correlations or as a proxy. Here, we present a synthesis of the techniques that can be applied to get a better understanding of the origin of the MS signal, through comparison with other palaeo-environmental proxies, through magnetic measurements or through dissolution and direct observation of the extracted minerals. We also propose an overview of the different techniques applied in order to use MS as a correlation tool, and we show various examples of successful applications of MS as a recorder of change in past sea-level and climate. We also present the main results and activities of the IGCP-580 project 'Application of magnetic susceptibility as a palaeoclimatic proxy on Palaeozoic sedimentary rocks and characterization of the magnetic signal'.

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Magnetic susceptibility as a high-resolution correlation tool and as a climatic proxy in Paleozoic rocks – Merits and pitfalls: Examples from the Devonian in Belgium

Cited by 63 publications

References 76 publications

The astronomical calibration of the Givetian (Middle Devonian) timescale (Dinant Synclinorium, Belgium)

The astronomical calibration of the Givetian (Middle Devonian) timescale (Dinant Synclinorium, Belgium)

A classic Late Frasnian chondrichthyan assemblage from southern Belgium

Magnetic susceptibility application: a window onto ancient environments and climatic variations: foreword

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