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See detailPétitions et rapports médicaux
Ricciardetto, Antonio ULg

Textual, factual or bibliographical database (2010)

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See detailPétitions et rapports médicaux: Bibliographie
Ricciardetto, Antonio ULg

Textual, factual or bibliographical database (2010)

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See detailPetits animaux de nos maisons
Loneux, Michèle ULg

Book published by Musée d'Histoire Naturelle - Editions de la Girafe, 56 photos couleurs, 6 figs., 55 pages (1998)

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See detailPetits commerces, grands préjugés
Dawance, Sophie ULg

in Politique : Revue de Débats (2008), 55

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See detailPetits dîners entre amis (et rivaux): prix, réseaux littéraires et stratégies de consacrants
Dozo, Björn-Olav ULg; Lacroix, Michel

in COnTEXTES : Revue de Sociologie de la Littérature (2010), 7

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See detailPetits producteurs - grands progrès : bilan de 10 années d'encadrement
Sindic, Marianne ULg; Belleflamme, Christel ULg; Corbisier, Patrice et al

Scientific conference (2006, January)

Application de la démarche qualité pour les premiers transformateurs agricoles.

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See detailPetits producteurs, grands progrès ! Bilan de dix années d'encadrement.
Sindic, Marianne ULg; Belleflamme, Christel ULg

in Le lait, une filière dynamique (2006)

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See detailLes Petits Riens de Daisuke Igarashi
Dejasse, Erwin ULg

in 9e Art : Les Cahiers du Musée de la Bande Dessinée (2007), 13

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See detailLes petits savent de grandes choses ! Une approche de l'écrit en 3ème maternelle
Dheur, G.; Mouvet, Bernadette ULg

Learning material (1992)

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See detailPETRA: Multivariate analyses for neuroimaging data
Segovia-Román, Fermín ULg; Álvarez Illán, Ignacio; Salas-Gonzalez, Diego et al

in Proceeding of 2nd International Work-Conference on Bioinformatics and Biomedical Engineering (in press)

In last years, many research efforts in neurosciences have focused in multivariate approaches based on machine learning as an al- ternative to the use of Statistical Parametric Mapping and the univariate ... [more ▼]

In last years, many research efforts in neurosciences have focused in multivariate approaches based on machine learning as an al- ternative to the use of Statistical Parametric Mapping and the univariate analyses that it provides. However, this relatively new field still lacks of a software framework that completely meets the needs of the scientific community. In this work we present a toolbox designed to facilitate the access to the recent advances in neuroimaging data analysis based on multivariate approaches. The toolbox, written on Matlab, is freely avail- able and implements a Graphical User Interface that allows managing neuroimaging data in an easy way. [less ▲]

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See detailPetrobras report January 2008
Steemans, Philippe ULg

Report (2008)

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See detailPetrogenesis of Archean PGM-bearing chromitites and associated ultramafic-mafic-anorthositic rocks from the Guelb el Azib layered complex (West African craton, Mauritania)
Berger, J.; Diot, H.; Lo, K. et al

in Precambrian Research (2013), 224

The Archean Guelb el Azib layered complex (GAC) in the West African craton of Mauritania is composed of an association of serpentinites, chromitites, amphibolites and anorthosites with few fine-grained ... [more ▼]

The Archean Guelb el Azib layered complex (GAC) in the West African craton of Mauritania is composed of an association of serpentinites, chromitites, amphibolites and anorthosites with few fine-grained amphibolite dykes. The complex forms tectonic slices in 2.9-3.5. Ga TTG gneiss terrains in close association with supracrustal rocks (BIFs, impure marbles, amphibolites). It was affected by a main granulite-facies grade metamorphism (up to 900. °C at 5-6. kbar) with subsequent retrogression in amphibolite and greenschist facies conditions. The preserved igneous macrostructures, the mineral compositions and the nature of relic magmatic assemblages have been used to constrain the composition of the parental melts and the conditions of crystallization. According to petrological observations and to comparison with experimental data, the formation of the complex can be explained by fractionation of a slightly hydrous high-alumina basaltic melt at low pressure. The early fractionation of olivine and the absence of massive clinopyroxene fractionation before plagioclase saturation led to crystallization of highly calcic plagioclase with Fe-, Al-rich but Cr-poor chromite from a hydrous tholeiitic parental magma, similar to worldwide Archean tholeiites. The complex shares many similarities with Archean anorthosite layered complexes, possibly formed in a supra-subduction zone environment according to results obtained on similar 2.9-3.0. Ga complexes from Greenland and India (namely Fiskenaesset and Sittampundi). Three phases of PGE mineralization affected the GAC chromitites: (i) igneous crystallization of laurite; (ii) formation of late magmatic IPGE sulpho-arsenides (irarsite-hollingworthite) and (iii) hydrothermal Pt-Pd mineralization represented by sperrylite and rustenburgite. © 2012 Elsevier B.V. [less ▲]

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See detailPetrogenesis of jotunitic and acidic members of an AMC suite (Rogaland anorthosite province, SW Norway): a Sr and Nd isotopic assessment
Bolle, Olivier ULg; Demaiffe, Daniel; Duchesne, Jean-Clair ULg

in Precambrian Research (2003), 124(2-4), 185-214

Sr and Nd isotopic data from the anorthosite-mangerite-charnockite (AMC) suite of the Late-Sveconorwegian (ca. 0.93 Ga) Rogaland anorthosite province of SW Norway are discussed. The study focuses on new ... [more ▼]

Sr and Nd isotopic data from the anorthosite-mangerite-charnockite (AMC) suite of the Late-Sveconorwegian (ca. 0.93 Ga) Rogaland anorthosite province of SW Norway are discussed. The study focuses on new data obtained from three distinct rock occurrences: (1) primitive (=MgO-rich and K2O-poor)jotunites that represent the parental magmas of leuconorite and mafic plutons (Sr-87/Sr-86(0.93Ga) = ca. 0.704-0.707, epsilon(Nd)(0.93 Ga) = +3.6 down to +1.2); (2) evolved jotunites that differentiated from the primitive jotunites and constitute the starting components of dyke-scale fractionation trends (Sr-87/Sr-86(0.93Ga) = ca. 0.705-0.713, epsilon(Nd)(0.93 Ga) = +0.4 down to -2.0); and (3) felsic plutons (Sr-87/Sr-86(0.93Ga) = ca. 0.707-0.723, epsilon(Nd)(0.93Ga) = +1.4 down to -1.7). A comparison of the Sr and Nd isotopic compositions with available geochemical data (major and trace elements) is also made. Fractionation of the primitive to the evolved jotunites, below the intrusion level of the anorthosite province, is shown to have involved crustal contamination. A case of fractional crystallization and simultaneous contamination/assimilation is substantiated in the felsic cap of a layered intrusion (the Bjerkreim-Sokndal intrusion). It is further proposed that the Sr and Nd isotopic compositions of the various felsic occurrences result from fractional crystallization of primitive jotunitic melts, with or without contamination/assimilation; this strengthens the possibility for large volumes of silica-rich magmas to have been produced by fractionation, through evolved jotunites, of primitive jotunites. The entire range in Sr and Nd isotopic compositions of the Rogaland anorthosite province is interpreted as reflecting a mixing of crustal contaminants, having variable Sr-87/Sr-86(0.93Ga) ratios and (negative) epsilon(Nd)(0.93 Ga) values, with a more isotopically primitive source. The crustal end members of that mixing array are represented by moderatey to strongly LILE-enriched high-grade gneisses from the Pre-Sveconorwegian basement of southernmost Norway, that have a crustal history extending back to 1.5-1.9 Ga in the surroundings of the anorthosite province. The primitive end member is either an unusual LREE-depleted and Rb-enriched component, possibly corresponding to an originally depleted source subsequently modified by metasomatic fluids, or a more classical depleted component; it corresponds to a gabbronoritic rock of the deep crust, as shown by recent experimental data, with a quite short crustal residence time (<0.4-0.2 Ga). If that mafic end member is the lower granulitic crust itself, this would imply the presence in the deep continental crust of southwesternmost Norway of a crustal material strongly different from the 1.7- to 1.9-Gyr-old, moderately LILE-enriched component that is supposed to constitute the largest volume of the present deep continental crust in southern Norway. (C) 2003 Elsevier Science B.V. All rights reserved. [less ▲]

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See detailPetrogenesis of monzonoritic dykes in the Egersund-Ogna anorthosite (Rogaland, SW Norway)
Duchesne, Jean-Clair ULg; Demaiffe, Daniel; Roelandts, Iwan et al

in Contributions to Mineralogy & Petrology (1985), 90

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See detailPetrogenesis of the Kabanga-Musongati layered mafic-ultramafic intrusions in Burundi (Kibaran Belt): geochemical, Sr-Nd isotopic constraints and Cr-Ni behaviour
Duchesne, Jean-Clair ULg; Liégeois, Jean-Paul ULg; Deblond, André et al

in Journal of African Earth Sciences (2004), 39

A succession of mafic-ultramafic layered intrusions forms an alignment in the boundary zone between the Kibaran belt and the Tanzania craton. The intrusions represent a continuous series of cumulate rocks ... [more ▼]

A succession of mafic-ultramafic layered intrusions forms an alignment in the boundary zone between the Kibaran belt and the Tanzania craton. The intrusions represent a continuous series of cumulate rocks. For instance, in the Mukanda-Buhoro and Musongati (MBM) contiguous bodies, the series starts with dunite and passes to lherzolite, pyroxenite, norite, gabbronorite and anorthosite on top. Cumulate textures are conspicuous in all rock types and cryptic layering characterises cumulus mineral compositions, thus evidencing fractional crystallization as a major differentiation mechanism. The increase of Cr in the ultramafic members of the series indicates that chromite was not a liquidus mineral in dunite and lherzolite rocks, thus unable to form chromitite layers. The high Ni-content of dunite seems to preclude the existence of conjugate Ni-rich sulphide deposits. The 87Sr/86Sr initial ratio is relatively constant and averages 0.7087, with some values up to 0.712 due to local assimilation. Fine-grained rocks from the MBM area are isotopically (Nd and Sr) similar to the MBM cumulates. Modelling their crystallization produces cumulus mineral compositions similar to those in the Musongati ultramafic rocks, which suggests a broadly picritic parental magma. On the other hand, fine-grained rocks from the Nyabikere area are not related to the Nyabikere cumulates. Nd and Sr isotope ratios show that the MBM magmatism is related to an enriched source, possibly an old subcontinental lithospheric mantle. The Nyabikere dykes, as well as the Waga dykes, come from a depleted mantle source, as do the A-type granitoids occurring in the same boundary zone. Several lines of evidence point to two types of parental magmas, a picritic magma, and a more evolved magma, broadly similar to the Bushveld Main Zone magma. [less ▲]

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See detailPetrographic evidence for primary hagendorfite in an unusual assemblage of phosphate minerals, Kibingo granitic pegmatite, Rwanda
Fransolet, André-Mathieu ULg; Hatert, Frédéric ULg; Fontan, François

in Canadian Mineralogist (2004), 42(Part 3), 697-704

A sample from the Kibingo granitic pegmatite, Rwanda, shows a striking assemblage of an alluaudite-group mineral with heterosite. The core of alluaudite s.l. is strongly pleochroic in blue green to ... [more ▼]

A sample from the Kibingo granitic pegmatite, Rwanda, shows a striking assemblage of an alluaudite-group mineral with heterosite. The core of alluaudite s.l. is strongly pleochroic in blue green to pinkish grey hues, and is rimmed by an irregular border, weakly pleochroic in yellow brown to greenish yellow tints. The pleochroic core is very rich in Na (up to 9.35% Na2O), whereas the yellowish green border is depleted in Na (3.75% Na2O) and more oxidized. The decrease of the Na contents is not accompanied by significant variations of the ratio Fe-tot/(Fe-tot + Mn). This mechanism represents the progressive transition of hagendorfite to alluaudite sensu stricto, and results from an oxidation, Na+ + Fe2+ --> rectangle + Fe3+. Heterosite exhibits cracks that are parallel to one of the cleavage directions, and that are favorable to the development of a product of alteration, identified as cyrilovite. Heterosite shows a chemical composition close to the idealized formula (Fe0.853+Mn0.153+)PO4, with a Mg content constant and quite low, i.e., 0.023 Mg apfu. The Kibingo heterosite seems to be the Fe-richest member known so far. The heterosite corresponds to an oxidized Fe-rich member of the triphylite - lithiophilite series, a member that was initially in equilibrium with the primary hagendorfite. The ratio Fe-tot/(Fe-tot + Mn) of the two minerals of this assemblage is different: the value is about 0.70 ire hagendorfite, and 0.85 in the former triphylite. The temperature of formation of hagendorfite is estimated at about 600degreesC. Contrary to the information in the literature, the Kibingo pegmatitic body differs from the amblygonite pegmatite of Mwaka and could be a poorly evolved neighboring pegmatitic lens. [less ▲]

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