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Inproceedings Reference Geothermal resources assessment methodology in Wallonia (Belgium).
The Geological Survey of Belgium (GSB) is involved in geothermal resources assessment at European scale with GeoElec and Thermomap (very shallow) projects and at regional scale with the geothermal plate-form of Wallonia. The GSB has recently completed a first evaluation of geothermal potential of the Walloon region for medium to high enthalpy (300-6000 m). In 2008, the U.S Geological Survey (USGS) has conducted an updated assessment of geothermal resources in the United States. The volume method was the primary scheme applied to identified geothermal systems in which the recoverable heat is estimated from the thermal energy available in a reservoir. In some European countries, the temperature data available generally allow to produce a heat flow map at great depth. The subsurface temperature measurements of Belgium were first compiled by Legrand in 1975 and updated by Vandenberghe & Fock in 1989. The temperature values from the coal and hydrocarbon exploration wells are significantly spread over the reservoirs. The geothermal gradients are strongly influenced by groundwater circulation. The fold and thrust belt context of the subsoil in Wallonia makes geothermal gradient interpretation, reservoir temperatures and reservoir volume difficult to assess. The first geothermal reservoirs identified at 1 kilometer depth were mapped by Berckmans & Vandenberghe (1998). The northern Campine and Anvers regions, the Hainaut basin, and the corridor between Liège and Visé were considered as potential areas. The waloon geothermal plate-form project consisted mainly in preparing and collecting deep geological structure and geothermal resource of the underground data. Geophysical, geological, temperatures and hydrogeological data required some up to date re-interpretation to match the current model knownledge of the deep geological underground of Wallonia. More details were given by a focused study on Liege area with a 3D model realized by Liege University and a chemical geothermometer analyse conducted by GSB. Two maps of geothermal energy interests were produced: one for low to medium depth (300-3000 m), and another one for great depth (3000-6000 m). They mainly represent cartography of the Devono-Carboniferous limestones and Lower Devonian quartzites for two geothermal horizons. Simplified versions of the two maps destinated to the public and policy makers were constructed according to the USGS geothermal resource and reserve terminology, illustrated in the Mc Kelvey diagram (1980). Berckmans A., Vandenberghe N., 1998. Use and potential of geothermal energy in Belgium. Geothermics 27: 235 - 242. Legrand, R. (1975). Jalons Géothermiques. Mémoire Explicatif Cartes Géologique, Mines Belgique, 16 :46 pp. Mc Kelvey (1980). US Geologcal Survey. Principles of a Resource/Reserve classification for Minerals, Circular 831. Vandenberghe N., Fock W. Temperature data in the subsurface of Belgium, 1989. Temperature data in the susbsurface of Belgium. Tectonophysics 164, 237-250.
Located in Library / RBINS Staff Publications
Inproceedings Reference The plastic clay industry in Andenne (Belgium), a geological and historical approach.
Located in Library / RBINS Staff Publications
Proceedings Reference "About Haematite. Procurement and transformation during recent prehistory." Field guide book of the International Workshop (Jambes 07-08/02/2013)
Located in Library / RBINS Staff Publications
Proceedings Reference "About Haematite. Procurement and transformation during recent prehistory." Abstract book of the International Workshop (Jambes 07-08/02/2013)
Located in Library / RBINS Staff Publications
Proceedings Reference Autour de l'hématite. Circulation et transformation au cours de la préhistoire récente : Méthodes d’analyse – About haematite. Procurement and transformation during recent prehistory: Analytical methods. Table ronde internationale – International works
Located in Library / RBINS Staff Publications
Proceedings Reference Rare Earth Elements and Sr-Isotopic Geochemistry: Tools to Determinate the Geological and Geographical Origins of Neolithic Fluorites [S14]
Located in Library / RBINS Staff Publications
Inproceedings Reference Geogenic CO2 releases in Belgium and Germany as natural analogues for the development and evaluation of monitoring tools and methods
Located in Library / RBINS Staff Publications
Proceedings Reference Did a major environmental event lead to the Late Bronze Age abandonment of the ancient harbor city of Hala Sultan Tekke? Unraveling the sedimentary record of the Larnaca salt lake, Cyprus.
Located in Library / RBINS Staff Publications
Inproceedings Reference The chronology of Lateglacial and Holocene fluvial dynamics in the Lower Scheldt basin (N-Belgium), and its relation with the archaeological record
In light of tidal restoration and nature development projects, several alluvial areas in the Lower Scheldt Basin (LSB) have been subjected to geo-archaeological surveys and excavations. An analysis of 80 radiocarbon dates obtained in these studies shows several trends in the chronology of Lateglacial and Holocene fluvial activity in the LSB. Similar evolutions are observed in other lowland river basins in NW Europe, and can be related to both climatic changes, and from the 4 th millennium cal BP onwards, also to anthropogenic influences. In general a low energy aggradation regime dominates the built up of the alluvial area throughout most of the early and middle Holocene. In several areas of the LSB fluvial activity increases in the 1 st millennium BC, with the incision and following aggradation of local channels. From the Roman period onwards the aggradation of alluvial fines again dominates the fluvial regime, extending the area of overbank sedimentation. The comparison between these radiocarbon dating results and the observed archaeological record allows to draw conclusions concerning the interplay between landscape development and the presence and preservation of the archaeological record.
Located in Library / RBINS Staff Publications
Inproceedings Reference Elucidation of an invasive slug species complex in California with comments on the source location of introductions
Located in Library / RBINS Staff Publications