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See detailMagnetic susceptibility and electron magnetic resonance study of monovalent potassium doped manganites Pr0.6Sr0.4−xKxMnO3
Thaljaoui, R.; Pękała, K.; Pękała, M. et al

in Journal of Alloys and Compounds (2013), 580(0), 137-142

The monovalent potassium doped manganites Pr0.6Sr0.4−xKxMnO3 (x = 0.05–0.2) are characterized using the complementary magnetic susceptibility and electron resonance methods. In paramagnetic phase the ... [more ▼]

The monovalent potassium doped manganites Pr0.6Sr0.4−xKxMnO3 (x = 0.05–0.2) are characterized using the complementary magnetic susceptibility and electron resonance methods. In paramagnetic phase the temperature variations of the inverse magnetic susceptibility and the inverse intensity of resonance signal obey the Curie–Weiss law. A similarity in temperature variation of resonance signal width and the adiabatic polaron conductivity points to the polaron mechanism controlling the resonance linewidth. The low temperature limit of the pure paramagnetic phase is determined from the electron resonance spectra revealing the mixed phase spread down to the Curie temperature. [less ▲]

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See detailMagnetic susceptibility and its relationship with paleoenvironments, diagenesis and remagnetization: examples from the Devonian carbonates of Belgium
Da Silva, Anne-Christine ULg; Dekkers, Mark; Mabille, Cédric et al

in Studia Geophysica & Geodaetica (2012), 56(2), 677-704

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See detailMagnetic Susceptibility and sedimentology techniques applied to unravel the interaction between eustasy and tectonic activity from the Jurassic Kashafrud Fromation (Koppeh Dagh Basin, NE Iran).
Sardar Abadi, Mehrdad ULg; Da Silva, Anne-Christine ULg; Amini et al

in Kido, E; Suttner, T; Piller, W (Eds.) et al IGCP-580, 4th annual meeting, 24-30th June 2012, Graz, Austria, Abstract book (2012)

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See detailMagnetic susceptibility applied as an age-depth-climate relative dating technique using sediments from Scladina Cave, a Late Pleistocene cave site in Belgium
Ellwood, B. B.; Harrold, F. B.; Benoist, S. L. et al

in Journal of Archaeological Science (2004), 31(3), 283-293

Here we demonstrate that magnetic susceptibility (MS) data from Scladina Cave, Belgium, provide a time-depth-climate relationship that is correlated to the marine oxygen isotopic record and thus yields a ... [more ▼]

Here we demonstrate that magnetic susceptibility (MS) data from Scladina Cave, Belgium, provide a time-depth-climate relationship that is correlated to the marine oxygen isotopic record and thus yields a high-resolution relative dating method for sediments recovered from many archaeological sites. This methodology will help resolve one of the major problems facing archaeologists, namely the difficulty of acquiring absolute dates with reasonable precision for the period from 40,000 to 400,000 years or so. The problem is that dating techniques applicable to most materials within this age range are subject to significant errors. Relative dating techniques.. such as magnetic secular variation or stable isotope methods, offer the potential to improve this precision. but both methods suffer from problems that make broad application to many sites impossible. However, for most archaeoloaical cave sites, MS measurements of cave sediments offers the potential for intra-site correlation and paleoclimate estimation. This is possible in protected cave environments because the MS of cave sediments results from climate processes active outside caves. which cause variations in magnetic properties of the sediments that ultimately accumulate inside caves. Once deposited, these materials are often preserved and their stratigraphy provides a time-depth-climate signal that can be identified. Therefore MS data can be used as an independent methodology, alongside conventional methods such as sedimentology and palynology, for relative age dates, and correlation within and between sites by tracing evidence of paleoclimatic change. This correlation has been used to infer an age of 90,000 +/- 7000 years for Neanderthal skeletal remains recovered from Scladina Cave, an important Middle Paleolithic archaeological site in Belgium. (C) 2003 Elsevier Ltd. All rights reserved. [less ▲]

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See detailMagnetic susceptibility correlation of km-thick Eifelian-Frasnian sections (Belgium-Czech Republic)
Boulvain, Frédéric ULg; Da Silva, Anne-Christine ULg; Mabille, Cedric et al

in Geologica Belgica (2010, December), 13(4), 5-7

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See detailMagnetic susceptibility correlation of km-thick Eifelian–Frasnian sections (Ardennes and Moravia)
Boulvain, Frédéric ULg; Da Silva, Anne-Christine ULg; Mabille, Cédric et al

in Geologica Belgica (2010), 13(4), 309-318

After briefly introducing the sedimentology of two Eifelian-Frasnian carbonate sections in Belgium and Moravia, this paper focuses on the comparison of the magnetic susceptibility (MS) curves. The ... [more ▼]

After briefly introducing the sedimentology of two Eifelian-Frasnian carbonate sections in Belgium and Moravia, this paper focuses on the comparison of the magnetic susceptibility (MS) curves. The Ardennes section shows highly variable facies, with an alternation of ramp, platform and mound environments. Detrital inputs are locally very important. Time-equivalent facies in the area of the Moravian Karst correspond to rather pure carbonate platform facies, mostly composed of Amphipora beds. This first analyse of long-term trends in Devonian MS in Belgium and Moravia shows a remarkable similarity, despite a very different background of palaeogeographical setting, facies, sedimentary rate and retrogradation-progradation history. However, a relative independence of the MS and the distal-proximal curves, deduced either from the microfacies record (Ardennes) or from shoreline shifts (Moravia) is observed. This questions the nature of the forcing mechanisms that must at least be active at the inter-regional scale. Moravia and the Ardennes are located along the same palaeolatitude, perhaps suggesting some climatically driven mechanisms, responsible for the input of the detrital fraction responsible for the MS in these sediments. Trade winds are potentially responsible for transportation of dust and its widespread distribution in intertropical areas. [less ▲]

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See detailMagnetic susceptibility correlation of km-thick Eifelian–Frasnian sections (Belgium–Czech Republic).
Boulvain, Frédéric ULg; Da Silva, Anne-Christine ULg; Mabille, Cedric et al

in SDGG, Heft 58 – Abstract Volume – 26th IAS Regional Meeting/SEPM-CES SEDIMENT 2008 – Bochum (2008)

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See detailA magnetic susceptibility curve for the Devonian Limestone from Belgium
Boulvain, Frédéric ULg; Mabille, Cédric ULg; Poulain, Geoffrey et al

in Geologica Belgica (2010), 13

This paper proposes a first magnetic susceptibility (MS) curve for the Devonian Limestone from Belgium. A comparison with a large scale depositional model shows the complex relations between MS and ... [more ▼]

This paper proposes a first magnetic susceptibility (MS) curve for the Devonian Limestone from Belgium. A comparison with a large scale depositional model shows the complex relations between MS and paleoenvironments. Other Devonian-scale MS curves from other parts of the world are necessary to constraint these relations. [less ▲]

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See detailA magnetic susceptibility curve for the Devonian limestone.
Boulvain, Frédéric ULg; Da Silva, Anne-Christine ULg

in 12e congrès français de sédimentologie, ASF Rennes, livre des résumés Publi.ASF 64 (2009)

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See detailMagnetic susceptibility evolution and sedimentary environments on carbonate platform sediments and atolls, comparison of the Frasnian from Belgium and Alberta, Canada
Da Silva, Anne-Christine ULg; Potma, Ken; Weissenberger, John A. W. et al

in Sedimentary Geology (2009), 214

Magnetic susceptibility (MS) measurements on carbonate rocks are considered as a proxy for impurities delivered to the carbonate environments. In the absence of strong climatic or tectonic variations ... [more ▼]

Magnetic susceptibility (MS) measurements on carbonate rocks are considered as a proxy for impurities delivered to the carbonate environments. In the absence of strong climatic or tectonic variations, bulk MS values have been linked to sea level variations, because sea-level fall increases clastic supply and therefore increases magnetic mineral deposition. In this paper we explore the relationship between the average magnitude of bulk MS, with shallowing-up sequences and facies evolution in different Devonian carbonate complexes. Similarities and differences between these parameters have been scrutinized in carbonate attached platform and detached platforms (mounds and/or atolls) from Belgium and Canada. In the carbonate attached platforms from Belgium and Canada, the MS patterns are directly related to depositional environment. Mean MS values increase from the most distal towards the most proximal facies and towards the top of the majority of fourth-order shallowing-up sequences. These trends are in agreement with theoretical background (MS increases with regression). In the Belgian detached platform, the average MS pattern generally shows an opposite behaviour of that observed in the attached carbonate platforms. Average MS decreases towards the most proximal facies and towards the top of a majority of the fourth-order shallowing-up sequences. This behaviour can be explained by the influence of sedimentary rate and water agitation during deposition. A high sedimentary rate will dilute the magnetic minerals in the atoll facies and the highwater agitation during deposition may be expected to have prevented the deposition of the magnetic grains. So, the combination of these two effects will result in the observed low values in the atoll crown and lagoonal facies. In the Canadian detached platform, MS is mainly negative. This means that the limestones are very pure. The technique does not appear to be appropriate in these rocks. The variations of average MS behaviour by platform type can imply difficulties in correlating carbonates from different settings. A comparison of time equivalent mound and platform deposits shows that after an important regressive surface, the MS values are increasing for the platform deposits and decreasing for the mound. So MS evolution can be in complete opposition (caused by highly different sedimentary rates) in different depositional settings. The MS signal preserved in carbonate rocks is probably mainly related to 1) varying clastic supplies; 2) varying carbonate accumulation rates (dilution of the magnetic minerals by high carbonate production) and 3) potentially diagenesis. [less ▲]

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See detailMagnetic susceptibility evolution in the Eifelian-Givetian Baileux section (Baileux section): complex origin of the magnetic susceptibility signal
Da Silva, Anne-Christine ULg; Dekkers, Mark; Mabille, Cédric et al

in Koptikova, Leona; Hladil, Jindrich; Adamovic, Jiri (Eds.) Miroslav Krs conference: time, magnetism, records, systems and solution. The 2011 Annual IGCP-580 Meeting. Abstract volume (2011)

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See detailMagnetic susceptibility evolution on Paleozoic sedimentary settings, a clue for past paleoenvironments
Da Silva, Anne-Christine ULg; Pas, Damien ULg; Mabille, Cédric et al

in Suttner; Kido; Piller (Eds.) et al Mid Paleozoic climate and biodiversity. IGCP-596 opening meeting. Abstract Volume (2011)

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See detailMagnetic susceptibility of Eifelian–Frasnian-Tournaisian carbonate sections (Belgium).
Boulvain, Frédéric ULg; Bertola; Da Silva, Anne-Christine ULg

in Geologica Belgica Meeting 2012; Moving plates and melting icecaps. Processes and forcing factors; Abstract book (2012)

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See detailMagnetic Susceptibility of Frasnian reefs and mounds from Eastern Belgium.
Demaude, Nicolas; Boulvain, Frédéric ULg; Cornet, Pierre et al

Conference (2010)

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See detailMagnetic susceptibility on different sedimentary settings, example from the Devonian of Belgium
Da Silva, Anne-Christine ULg; Mabille, Cédric; Boulvain, Frédéric ULg

in Geologica Belgica (2010, December), 13(4),

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See detailMagnetic susceptibility records in recent (Cenozoic) and Ancient (Devonian – Palaeozoic) mound systems.
Foubert, Anneleen; Da Silva, Anne-Christine ULg; Boulvain, Frédéric ULg et al

in Geologica Belgica (2010, December), 13(4),

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See detailMagnetic susceptibility, correlations and Palaeozoic environments: foreword.
Da Silva, Anne-Christine ULg; Boulvain, Frédéric ULg

in Geologica Belgica (2010), 13(4), 287-290

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See detailMagnetic Susceptibility, Correlations and Paleozoic Environments
Da Silva, Anne-Christine ULg; Boulvain, Frédéric ULg

Book published by Geologica Belgica (2010)

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