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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 detailGeophysical records in recent (Cenozoic) and ancient (Devonian – Palaeozoic) carbonate mound systems.
Foubert, Aneleen; Da Silva, Anne-Christine ULg; De MolB, Ben et al

in Book of Abstracts - 18th ISC Congress (2010, October 28)

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See detailPalaeoenvironmental study and small scale correlations using facies analysis and magnetic susceptibility of the Mid-Emsian (Himmelbaach quarry, Luxembourg).
Michel, Jonathan ULg; Boulvain, Frédéric ULg; Philippo, Simon et al

in Geologica Belgica (2010), 13(4), 447-458

The Himmelbaach quarry is located in the Wiltz Synclinorium in Luxembourg. The rocks outcropping in this quarry correspond to the mid-Emsian Clervaux Shales Formation. Three different facies have been ... [more ▼]

The Himmelbaach quarry is located in the Wiltz Synclinorium in Luxembourg. The rocks outcropping in this quarry correspond to the mid-Emsian Clervaux Shales Formation. Three different facies have been identified in the quarry. An argillaceous sandstone facies with oblique stratifications, cross-stratifications, herring-bones and erosive bases represent the first facies; the second facies is characterized by lenticular- (with connected lenses) to wavy-bedded sandy argillites, argillaceous sandstones and quartz arenites. The last facies corresponds to a quartz arenite with oblique stratification, planar laminations and mud drapes. The base of this facies shows flaser bedding and sigmoidally curved bed surfaces. The palaeoenvironmental study of this area is rather difficult because of the structural deformation and lateral variation of the facies. Due to this deformation, six partial sections (4a to 4f) were sampled here. In order to reconstruct a reliable vertical and lateral succession of the depositional setting, facies analysis and magnetic susceptibility were used. Magnetic susceptibility (MS) is generally applied as a tool for correlation in a deepwater carbonated environment. In this paper we used the MS technique successfully in a siliciclastic proximal setting. Analysis of MS curves as well as the recognition of three marker beds ((1) the last bed of argillaceous sandstones in Facies 1; (2) a thin horizon of carbonated sandstone within Facies 2; (3) the first appearance of the characteristics massive quartzitic beds in Facies 3) allowed the correlation of sections 4a, 4b and 4c. These correlations helped us to reconstruct a vertical and lateral succession of facies, which ultimately led to the recognition of a tide-dominated marginal-marine depositional model composed respectively of tidal channels (Facies 1), a tidal flat (Facies 2) and a tidal sand ridge (Facies 3). This example also shows the usefulness of magnetic susceptibility for small scale correlation, even in a proximal environment such as a marginal-marine setting. [less ▲]

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See detailApplication of magnetic susceptibility on different carbonate systems
Da Silva, Anne-Christine ULg

Scientific conference (2010, February 02)

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See detailDelta and deep basin Jurassic deposits from Iran: relationship between magnetic susceptibility and facies
Sardar Abadi, Mehrdad ULg; Da Silva, Anne-Christine ULg; Zamanzadeh

in Abstract 4eme Congrès Français de Stratigraphie, Strati2010, Paris, France, 30 Augustus – 2 September (2010)

This study concerns, the Kashafrud Formation from Kopet Dagh Basin in its type section, which corresponds to the first Jurassic sedimentary cycle in Iran,. Sedimentary studies were carried out to propose ... [more ▼]

This study concerns, the Kashafrud Formation from Kopet Dagh Basin in its type section, which corresponds to the first Jurassic sedimentary cycle in Iran,. Sedimentary studies were carried out to propose a paleoenvironmental model of the sedimentary succession. Furthermore, magnetic susceptibility (MS) measurements were performed and compared with sedimentological evolution. The MS curve evolution is related to the abundance of magnetic minerals, which itself is related to lithogenic supplies which could be related mostly to sea level and climatic changes. Theoretically, a regression will lead to a more important proportion of landmass exposed and so to an increase of detritic minerals in the sedimentary system and so to an increasing MS. A transgression will decrease MS (Ellwood et al., 2000). Palaeoenvironments of this Jurassic succession from base to top are: flood dominated delta, deep basin deposits, silisiclastic and mixed silisiclastic and carbonate shoreface deposits. Comparison between facies evolution and MS curve shows that the facies which are deposited in delta and shoreface zones have low MS values; on the contrary basinal deposits are presenting high MS values. The facies deposited in mixed silisiclastic and carbonate shoreface have lowest MS values. So it appears that the deeper basinal deposits have the highest MS values and the shallower deltaic and shorelines facies have the lowest MS values, in opposition with theoretical background. This could be related to water agitation and sedimentation rate during deposition. In the deltaic and shoreface environments, a high water agitation could prevent the detritic particles to settle and a high sedimentary rate could dilute the magnetic minerals (see Da Silva et al., 2009). It actually seams that the carbonate production in the upper parts of the studied interval has led to a dramatic decrease in MS values. This study clearly shows the significant role of MS in environmental analysis, and the importance of a strong sedimentological background. Ellwood, B.B., Crick, R.E., El Hassani, A., Benoist, S.L. & Young, R.H., 2000. Magnetosusceptibility event and cyclostratigraphy method applied to marine rocks: detrital input versus carbonate productivity. Geology, 28: 1135-1138. Da Silva, A.-C., Mabille, C. & Boulvain, F., 2009. Influence of sedimentary setting on the use of magnetic susceptibility: examples from the Devonian of Belgium. Sedimentology, 56: 1292-1306. [less ▲]

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See detailAbstract of the first IGCP – 580 meeting (Liège, Belgium, 2-6 December 2009)
Da Silva, Anne-Christine ULg; Boulvain, Frédéric ULg

Book published by Geologica Belgica (2010)

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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 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 detailCours de diagenèse
Da Silva, Anne-Christine ULg

Learning material (2010)

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See detailAnnual report 2010 of the IGCP-580 Project.
Da Silva, Anne-Christine ULg; Whalen, Michael; Hladil, Jindrich et al

Report (2010)

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See detaille phénomène récifal Givétien en Ardenne.
Boulvain, Frédéric ULg; Mabille, Cédric; Da Silva, Anne-Christine ULg

in Brice, Denise (Ed.) Le Givétien (2010)

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See detailMagnetic susceptibility and cyclic arrangements from the late Devonian (Frasnian) Hull platform, Canning Basin, Australia.
Da Silva, Anne-Christine ULg; George, Annette; Chow, Nancy

in Travaux de Geophysiques (2010), XXXIX

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See detailStromatoporoids paleoecology from the Frasnian (Upper Devonian) of Southern Belgium.
Da Silva, Anne-Christine ULg; Kershaw, Stephen; Boulvain, Frédéric ULg

in International Palaeontological Congress, Programme and Abstracts (2010)

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See detailCyclostratigraphic implications of Devonian-climate astronomical forcing.
De Vleeschouwer, David; Da Silva, Anne-Christine ULg; Boulvain, Frédéric ULg et al

in Geological Society of America Abstracts with Programs (2010), 42(5), 540

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See detailCenozoic and Devonian carbonate mound systems – comparisons of magnetic susceptibility behaviour between recent and ancient systems.
Da Silva, Anne-Christine ULg; Foubert, Anneleen; De Mol, Ben

in Travaux Géophysiques (2010), XXXIX

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

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

Detailed reference viewed: 16 (3 ULg)