References of "Geologica Belgica"
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See detailShort note: Synthetic ilmenite as a blank to XRF trace element determination
Duchesne, Jean-Clair ULg; Bologne, Guy

in Geologica Belgica (2011), 14(1-2), 103-106

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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 detailDetailed sedimentological study and magnetic susceptibility of and Eifelian mixed ramp-related system in the Eifel area
Pas, Damien ULg; Mabille, Cédric; Aretz, Markus et al

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

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See detailApplication of magnetic susceptibility to the Maastrichtian-Eocene phosphatic deposits of Séjla section in Gafsa-Métlaoui basin (Southern Tunisia)
Akermi, Souha; Abdallah, H.; Da Silva, Anne-Christine ULg et al

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 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 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 detailEarthquake-induced hazards in mountain regions: a review of case histories from Central Asia – an inaugural lecture to the society.
Havenith, Hans-Balder ULg; Bourdeau, Céline

in Geologica Belgica (2010), 13/3

This paper presents a summary of the main trigger factors of earthquake-induced landslides as well as a review of case histories of major landslide-triggering earthquake events in Central Asia. The goal ... [more ▼]

This paper presents a summary of the main trigger factors of earthquake-induced landslides as well as a review of case histories of major landslide-triggering earthquake events in Central Asia. The goal is to analyse the relationship between geological, tectonic and morphological conditions and the susceptibility to seismic slope failure and to show the potential long-term contribution of seismic ground motion dynamics, such as site effects and liquefaction, to slope failure. Case histories related to five M>7 earthquake events in the Tien Shan and Pamir Mountains are outlined: the earthquakes of Kemin in 1911, Sarez in 1911, Khait in 1949, Gissar in 1989 and Suusamyr in 1992. The Kainama earth-flow case history of 2005 is added to document possible mid-term effects of smaller earthquakes. These events show that in the Central Asian Mountains, two types of seismically triggered mass movements may have particularly disastrous effects: massive long rockslides and medium-sized earth flows made of loess – or a mixture of both. Actually, the most catastrophic mass movement of the last century in Central Asia triggered by the 1949 Khait earthquake was a massive long runout rock avalanche, which had gained a very high velocity due to the entrainment of loess sediments and related lubrification. [less ▲]

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See detailCenomanian sands and clays north of the Vesdre valley: the oldest known Cretaceous deposits in eastern Belgium
Demoulin, Alain ULg; Quesnel, Florence; Dupuis, Christian et al

in Geologica Belgica (2010), 11(3), 241-256

A number of motored auger holes have been drilled in 2002 and 2006 in four sand-clay deposits preserved in dissolution pockets within the Dinantian limestones of the watershed north of the Vesdre valley ... [more ▼]

A number of motored auger holes have been drilled in 2002 and 2006 in four sand-clay deposits preserved in dissolution pockets within the Dinantian limestones of the watershed north of the Vesdre valley. These deposits of unknown age are currently classified as (Tertiary) SBL in the new geological map of Wallonia. We present detailed lithostratigraphic logs of the deposits and describe the results of sedimentological and mineralogical analyses. In particular, K-Ar dating of neoformed Mn oxides found at the base of one augerhole at Rechain yielded ages ranging from Cenomanian to Santonian, allowing us to place the Rechain and Andrimont deposits within the early Late Cretaceous. This is fully consistent with their topographic location very close beneath the trace of the pre-Cretaceous erosion surface and makes them the westernmost remains of the Hergenrath Member of the Late Cretaceous Aachen Formation. To the west, the Magnée deposit is more “typical SBL”, probably corresponding to the Late Neogene filling of a dissolution pocket by reworked weathering products of the local Cretaceous cover. [less ▲]

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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 detailThe stratigraphical architecture of the Quaternary deposits as support for hydrogeological modelling of the central zone of Hanoi (Vietnam)
Jusseret, Simon; Baeteman, Cecile; Dassargues, Alain ULg

in Geologica Belgica (2010), 13(1-2), 77-90

The Quaternary deposits of the Hanoi area have been investigated in order to provide information required for the design of a groundwater-flow model. Limited sedimentological data exist from 32 ... [more ▼]

The Quaternary deposits of the Hanoi area have been investigated in order to provide information required for the design of a groundwater-flow model. Limited sedimentological data exist from 32 destructive drillings carried out previously in the study area. The data base contains hydrographical and hydrogeological observations, but few sedimentological details. This is in contrast with the more seaward regions of the area where the Holocene deposits of the Red River plain has previously been studied. However, a comparison of the results obtained in this study with the previous studies indicates that the Hanoi sediment succession developed in an incised valley under conditions of rapid relative sealevel rise until ca. 7-6 a cal BP. The succession consists initially of alluvial floodplain deposits conformably overlain by mud deposited at the head of an estuary which filled with continuing rapid sea-level rise. Once the relative sea-level rise stabilized, fluvial deposition prograded over the adjacent estuarine mud. The development of a groundwater-flow model requires knowledge of the three-dimensional distribution of the various deposits. Despite the paucity of information with respect to sediment description, a model of the entire Quaternary sequence is presented in several lithostratigraphic crosssections and a panel diagram. The latter forms the basis for the construction of a contour map of the base of the Pleistocene and Holocene deposits, and for a sequence map of the Quaternary deposits in the study area. [less ▲]

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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 detailXRF major and trace element determination in Fe-Ti oxide minerals
Duchesne, Jean-Clair ULg; Bologne, Guy

in Geologica Belgica (2009), 12(3-4), 205-212

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See detailTowards a palaeogeographical and sequential framework for the Givetian of Belgium
Boulvain, Frédéric ULg; Mabille, Cédric ULg; Poulain, Geoffrey et al

in Geologica Belgica (2009), 12

This paper starts with a review of facies and reef morphologies from the Givet Group in the Ardenne area. Platform initiation and evolution are analyzed and related to external factors at a global scale ... [more ▼]

This paper starts with a review of facies and reef morphologies from the Givet Group in the Ardenne area. Platform initiation and evolution are analyzed and related to external factors at a global scale (sea level changes, climate changes), at a regional scale (local subsidence, change in detrital supply) and to internal factors like organic communities composition. More specifically, the location of reef barriers are related to sea level changes and a sequence stratigraphic canvas is proposed. [less ▲]

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