[en] Dust deposition in southern Belgium is estimated from the geochemical signature of an ombrotrophic peatland. The Rare Earth Elements (REE) and lithogenic elements concentrations, as well as Nd isotopes, were determined by HR-ICP-MS and MC-ICP-MS respectively, along a 6 m peat section covering 5300 years, from 2000 to 7300 cal.BP dated by the 14C method. Changes in REE concentration in the peat correlate with those of Ti, Al, Sc and Zr that are lithogenic conservative elements, suggesting that REE are immobile in the studied peat bogs and can be used as tracers of dust deposition. Peat humification and testate amoebae were used to evaluate hydroclimatic conditions. The range of dust deposition varied from 0.03 to 4.0 g m-2 yr-1. The highest dust fluxes were observed from 2750 to 2550 cal.BP and from 5150 to 4750 cal.BP and correspond to cold periods. The Nd values show a large variability from -13 to –5, identifying three major sources of dusts: local soils, distal volcanic and desert particles.
Research center :
AGES
Disciplines :
Earth sciences & physical geography
Author, co-author :
Allan, Mohammed ; Université de Liège - ULiège > Doct. sc. (géologie - Bologne)
Beghin, Jérémie ; Université de Liège - ULiège > Département de géologie > Paléobiogéologie - Paléobotanique - Paléopalynologie (PPP)
Le Roux, Gael
Piotrowska, Natalia
Javaux, Emmanuelle ; Université de Liège - ULiège > Département de géologie > Paléobiogéologie - Paléobotanique - Paléopalynologie (PPP)
Court-Picon, Mona ; Université de Liège - ULiège > Département de géologie > Département de géologie
Mattielli, Nadine
Verheyden, Sophie
Fagel, Nathalie ; Université de Liège - ULiège > Département de géologie > Argiles, géochimie et environnements sédimentaires
Language :
English
Title :
Mid and late Holocene dust deposition in Western Europe: The Misten peat bog (Hautes Fagnes - Belgium)
Abouchami, W., Galer, S. J. G., and Koschinsky A.: Pb and Nd isotopes in NE Atlantic Fe-Mn crusts: Proxies for trace metal paleosources and paleocean circulation, Geochim. Cosmochim. Acta., 63, 1489-1505, 1999. (Pubitemid 29515088)
Akagi, T., Feng-Fu, F., Yabuki, S.: Absence of Ce anomaly in the REE patterns of peat moss and peat grass in the Ozegahara peat-land, Geochem. J., 36, 113-118, 2002. (Pubitemid 34416337)
Ali, A. and Srinivasan, G.: Precise thermal ionization mass spectro-metric measurements of 142 Nd/144 Nd and143Nd/ 144Nd iso-topic ratios of Nd separated from geological standards by chro-matographic methods, Int. J. Mass. Spectrom., 299, 27-34, 2011.
André, L., Deutsch, S., and Hertogen, J.: Trace-element and Nd isotopes in shales as indexes of provenance and crustal growth: The early Paleozoic from the Brabant Massif (Belgium), Chem. Geol., 57, 101-115, 1986.
Aubert, D., Le Roux, G., Krachler., M., Cheburkin, A., Kober., B., Shotyk., W., and Stille., P.: Origin and fluxes of atmospheric REE entering an ombrotrophic peat bog in Black Forest (SW Germany): Evidence from snow, lichens and mosses, Geochim. Cos-mochim. Acta, 70, 2815-2826, 2006. (Pubitemid 43677094)
Beghin, J., Salpeteur, T., Charman, D., Lamentowicz, M., Gerri-enne, P., Streel, M., Court-Picon, M., Allan, M., Fagel, N., and Javaux E.: Surface wetness reconstruction using testate amoebae analysis of the mid to late Holocene Misten peat bog (Hautes-Fagnes, eastern Belgium), in preparation, 2013.
Belokopytov, I. E. and Veresnevich, V. V.: Giktorf's peat borers, Torfânaâ promyslennost', 8, 9-10, 1955.
Blaauw, M. and Christen, J. A.: Flexible paleoclimate age-depth models using an autoregressive gamma process, Bayesian Analysis, 6, 457-474, 2011.
Blaauw, M., van Geel, B., and van der Plicht, J.: Solar forcing of climate change during the mid-Holocene: indications from raised bogs in The Netherlands, The Holocene, 14, 34-44, 2004.
Booth, R. K., Jackson, S. T., and Gray, C. E. D.: Paleoecology and high-resolution paleohydrology of a kettle peatland in upper Michigan, Quaternary Res., 61, 1-13, 2004. (Pubitemid 38300734)
Booth, R. K., Lamentowicz, M., and Charman, D. J.: Preparation and analysis of testate amoebae in peatland palaeoenvironmental studies, Mires and Peat, 7, 1-7, 2010.
Bout-Roumazeilles, V., Combourieu-Nebout, N., Desprat, S., Siani, G., Turon, J.-L., and Essallami, L.: Tracking atmospheric and riverine terrigenous supplies variability during the last glacial and the Holocene in central Mediterranean, Clim. Past, 9, 1065-1087, doi:10.5194/cp-9-1065-2013, 2013.
Bronk, R. C.: Bayesian analysis of radiocarbon dates, Radiocarbon, 51, 337-360, 2009.
Chambers, F. M., Booth, R. K., De Vleeschouwer, F., Lamen-towicz, M., Le Roux, G., Mauquoy, D., Nichols, J. E. and van Geel, B.: Development and refinement of proxy-climate indicators from peats, Quaternary Int., 268, 21-33, doi:10.1016/j.quaint.2011.04.039, 2011.
Charman, D. J., Hendon, D., and Woodland, W.: The identification of peatland testate amoebae. Quaternary Research Association Technical Guide no.9, London, UK, 2000.
Chauvel, C. and Blichert-Toft, J.: A hafnium isotope and trace element perspective on melting of the depleted mantle, Earth Planet. Sci. Lett., 190, 137-151, 2001. (Pubitemid 32792285)
Claussen, M., Kubatzki, C., Brovkin, V., Ganopolski, A., Hoelz-mann, P., and Pachur, H. J.: Simulation of an abrupt change in Saharan vegetation in the mid-Holocene, Geophys. Res. Lett., 26, 2037-2040, doi:10.1029/1999GL900494, 1999.
Cottin, J. Y., Lorand, J. P., Agrinier, P., Bodinier, J. L., and Liee-geois, J. P.: Isotopic (O, Sr, Nd) and trace element geochemistry of the Laouni layered intrusions (Pan-African belt, Hoggar, Algeria): evidence for post-collisional tholeiitic magmas variably contaminated by continental crust, Lithos., 45, 197-222, 1998. (Pubitemid 29430699)
Damblon, F.: Les dépôts tourbeux et l'histoire de la végétation sur le plateau des Hautes-Fagnes (Belgique), Annales de la Société géologique de Belgique, 117, 259-276, 1994. (Pubitemid 28054440)
Davis, B. A. S. and Brewer, S.: Orbital forcing and the role of the Latitudinal Temperature/Isolation Gradient, Clim. Dy-nam., 32, 143-165, 2009.
Davis, B. A. S., Brewer, S., Stevenson, A. C., Guiot, J., and Data contributors: The temperature of Europe during the Holocene reconstructed from pollen data, Quaternary Sci. Rev., 22, 1701-1716, 2003. (Pubitemid 36914574)
DeMenocal, P., Ortiz, J., Guilderson, T., Adkins, J., Sarnthein, M., Baker, L., and Yarusinsky, M.: Abrupt onset and termination of the African Humid Period: Rapid climate responses to gradual insolation forcing, Quaternary Sci. Rev., 19, 347-361, doi:10.1016/S0277-3791(99)00081-5, 2000. (Pubitemid 30018302)
De Paolo, D. J. and Wasserburg, G. J.: Nd isotope variations and netrogenetic models, Geoohvs. Res. Let. Washington 3, 6017-6040, 1976.
De Vleeschouwer, F., Gérard, L., Goormaghtigh, C., Mattielli, N., Le Roux, G., and Fagel, N.: Atmospheric lead and heavy metal pollution records from a Belgian peat bog spanning the last two millennia: Human impact on a regional to global scale, Sci. Total Environ., 377, 282-295, 2007. (Pubitemid 46660963)
Delmonte, B., Petit, J. R., and Maggi, V.: Glacial to Holocene implications of the new 27, 000-year dust record from the EPICA Dome C (East Antarctica) ice core, Clim. Dynam., 18, 647-660, 2002. (Pubitemid 34523289)
Delmonte, B., Basile-Doelsch, I., Petit, J. R., Maggi, V., RevelRolland, M., Michard, A., Jagoutz, E., and Grousset, F.: Comparing the EPICA and Vostok dust records during the last 220 000 years: stratographical correlation and origin in glacial periods, Earth Sci. Rev., 66, 63-87, 2004. (Pubitemid 38763512)
De Vleeschouwer, F., Luthers, C., Mauquoy, D., Wastiaux, C., Le Roux, G., Moschen, R., Pawlyta, J., Pazdur, A., Sikorski, J., and Piotrowska, N.: Multiproxy paleoenvironmental study in the Misten bog (East Belgium) during the last millennium, Quaternary Int., 268, 44-57, 2012.
Fagel, N., Innocent, C., Stevenson, R., and Hillaire-Marcel, C.: Deep circulation changes in the Labrador Sea since the Last Glacial Maximum: New constraints from Sm-Nd data on sediments, Paleoceanography, 14, 0883-8305, 1999.
Ferket, H., Muchez, P., Schroyen, K., and Sintubin, M.: Metamor-phism in the Stavelot-Venn Massif: a study of quartz veins in the basal devonian conglomerates (Lochkovian), Aardkundige Mededelingen, 9, 7-16, 1998. (Pubitemid 34414411)
Gabrielli, P., Wegner, A., Petit, J.R., Delmonte, B., De Deckker, P., Gaspari, V., Fischer, H., Ruth, U., Kriews, M., Boutron, C., Cescon, P., and Barbante, C.: A major glacial-interglacial change in aeolian dust composition inferred from Rare Earth Elements in Antarctic ice, Quaternary Sci. Rev., 29, 265-273, 2010.
Gallet, S., Jahn B., Lanoe, B. V. V, Dia, A., and Rossello, E.: Loess geochemistry and its implications for particle origin and composition of the upper continental crust, Earth Planet. Sci. Lett., 156, 157-172, 1998.
Givelet, N., Le Roux G., Cheburkin, A., Chen, B., Frank, J., Good-site, M. E., Kempter, H., Krachler, M., Noernberg, T., Rausch, N., Rheinberger, S., Roos-Barraclough, F., Sapkota, A., Scholz, C., and Shotyk, W.: Suggested protocol for collecting, handling and preparing peat cores and peat samples for physical, chemical, mineralogical and isotopic analyses, J. Environ. Monit., 6, 481-492, 2004. (Pubitemid 38716543)
Goudie, A. S.: The global distribution of dust storms, An. Arid Zone, 40, 1-12, 2001.
Goudie, A. S. and Middleton, N. J.: Desert Dust in the Global System, Springer, 2006.
Grimm, E. C.: CONISS: A fortran 77 program for stratigraphically constrained cluster analysis by the method of incremental sum of squares, Comp. Geosci., 13, 13-35, 1987.
Grousset, F. E. and Biscaye, P. E.: Continental aerosols, isotopic fingerprints of sources and atmospheric transport: a review, Chem. Geol., 222, 149-167, 2005.
Grousset, F. E., Ginoux, P., Bory, A., and Biscaye, P. E.: Case study of a Chinese dust plume reaching the French Alps, Geo-phys. Res. Lett., 30, 1277, doi:10.1029/2002GL016833, 2003.
Handley, H. K., Turner, S., Macpherson, C. G., Gertisser, R., and Davidson, J. P.: Hf-Nd isotope and trace element constraints on subduction inputs at island arcs: Limitations of Hf anomalies as sediment input indicators, Earth Planet. Sci. Let., 304, 212-223, 2011.
Johnsen, S. J., Dahl-Jensen, D., Gundestrup, N., Steffensen, J. P., Clausen, H. B., Miller, H., Masson-Delmotte, V., Sveinbjörns-dottir, A. E., and White, J.: Oxygen isotope and palaeotempera-ture records from six Greenland ice-core stations: Camp Century, Dye-3, GRIP, GISP2, Renland and NorthGRI, J. Quaternary Sci., 16, 299-307, 2001. (Pubitemid 32494784)
Kamanov, G. D., Brenner, M., and Tucker, J. L.: Anthropogenic versus natural control on trace element and Sr-Nd-Pb iso-tiope stratigraphy in peat sediments of southeast Florida (USA), ∼1500AD to present, Geochem. Cosmochim. Acta, 73, 3549-3567, 2009.
Krachler, M., Mohl, C., Emons, H., and Shotyk, W.: Two thousand years of atmospheric rare earth element (REE) deposition as revealed by an ombrotrophic peat bog profile, Jura Mountains, Switzerland, J. Environ. Monitor., 5, 111-121, 2003. (Pubitemid 36223176)
Kylander, M. E., Muller, J., Wust, R. A. J., Gallagher, K., Garcia-Sanchez, R., Coles, B. J., and Weiss, D. J.: Rare earth elementand Pb isotope variations in a 52 kyr peat core from Lynch's Crater (NE Queensland, Australia): proxy development and application to paleoclimate in the Southern Hemisphere, Geochim. Cosmochim. Acta, 71, 942-60, 2007. (Pubitemid 46179061)
Kylander, M. E., Bindler, R., Martínez Cortizas, A., Gallagher, K., Mörth, C. M., and Rauch, S.: A novel geochemical approach to paleorecords of dust deposition and effective humidity: 8500 years of peat accumulation at Store Mosse (the "Great Bog") Sweden, Quarternary Sci. Rev., 69, 69-82, 2013.
Lambert, F., Bigler, M., Steffensen, J. P., Hutterli, M., and Fischer, H.: Centennial mineral dust variability in high-resolution ice core data from Dome C, Antarctica, Clim. Past, 8, 609-623, doi:10.5194/cp-8-609-2012, 2012.
Lamentowicz, M., Obremska, M., and Mitchell, E. A. D.: Auto-genic succession, land-use change, and climatic influences on the Holocene development of a kettle hole mire in Northern Poland. Rev. Palaeobot. Palynol., 151, 21-40, 2008.
Lawson, I. T., Swindles, G. T., Plunkett, G., and Greenberg, D.: The spatial distribution of Holocene cryptotephras in north-west Europe since 7 ka: implications for understanding ash fall events from Icelandic eruptions, Quarternary Sci. Rev., 41, 57-66, 2012.
Lawrence, C. R. and Neff, J. C.: The contemporary physical and chemical flux of Aeolian dust: A synthesis of direct measurements of dust deposition, Chem. Geol., 267, 46-63, 2009.
Le Roux, G., Fagel, N., De Vleeschouwe, F., Krachler, M., Debaille, V., Stille, P., Mattelli, N., Van der Knaap, W. O., Van Leeuwen, J. F. N., and Shotyk, W.: Volcano-and climate-driven changes in atmospheric dust sources and fluxes since the Late Glacial in Central Europe, Geology, 40, 335-338, 2012.
Linnemann, U., Herbosch, A, Liégeois, J.-P., Pin, C, Gärtner, A., and Hofmann, M.: The Cambrian to Devonian odyssey of the Brabant Massif within Avalonia: a review with the new zircon ages, geochemistry, Sm-Nd isotopes, stratigraphy and palaeo-geography, Earth Sci. Rev., 112, 126-154, 2012.
Magny, M.: Holocene climatic variability as reflected by mid-European lake-level fluctuations, and its probable impact on prehistoric human settlements, Quaternary Int., 113, 65-80, 2004.
Martín-Chivelet, J., Muñoz-García, M. B., Edwards, R. L., Turrero, M. J., and Ortega, A. I.: Northern Spain 4000 Year Stalagmite d13C and Temperature Reconstruction, Global Planet. Change, 77, 1-12, 2011.
Marx, S. K., Kamber, B. S., and McGowan, H. A.: Provenance of long travelled dust determined with ultra-trace-element composition: a pilot study with samples from New Zealand glaciers, Earth Surf. Process. Landforms, 30, 699-716, 2005. (Pubitemid 40906493)
Marx, S. K., McGowan, H. A., and Kamber, B. S.: Long-range dust transport from eastern Australia: a proxy for Holocene aridity and ENSO-induced climate variability, Earth Planet. Sci. Lett., 282, 167-177, 2009.
Marx, S. K., Kamber, B. S., McGowan, H. A., and Denholm, J.: Holocene dust deposition rates in Australia's Murray-Darling Basin, record the interplay between aridity, position of the mid-latitude westerlies, Quaternary Sci. Rev., 30, 3290-3305, 2011.
Mayewski, P. A., Rohling, E. E., Stager, J. C., Karlen, W., Maasch, K. A., Meeker, L. D., Meyerson, E. A., Gasse, F., van Kreveld, S., Holmgren, K., Lee-Thorp, J., Rosqvist, G. Rack, F., Staubwasser, M., Schneider, R. R., and Steig, E. J.: Holocene climate variability, Quaternary Res., 62, 243-255, 2004. (Pubitemid 39499957)
Meskhidze, N., Chameides, W. L., Nenes, A., and Chen, G.: Iron mobilization in mineral dust: Can anthropogenic SO2 emissions affect ocean productivity?, Geophys. Res. Lett., 30, 2085, doi:10.1029/2003GL018035, 2003.
Moreno, T., Castillo, S., Alastuey, A., Cuevas, E., Herrmann, L., Mounkaila, M., Elvira, J., and Gibbons, W.: Geochemical variations in aeolian mineral particles from the Sahara-Sahel Dust Corridor, Chemosphere, 65, 261-270, 2006. (Pubitemid 44177653)
Müller, B., Höhne, N., and Ellermann, C.: Differentiating (historic) responsibilities for Climate Change, Oxford Institute for Energy Studies (OIES), University of Oxford, Royaume-Un, 2007.
Payne, R. J.: Can testate amoeba-based palaeohydrology be extended to fens?, J. Quaternary Sci., 26, 15-27, 2011.
Payne, R. J. and Mitchell, E. A. D.: How many is enough? Determining optimal count totals for ecological and palaeoecological studies of testate amoebae, J. Paleolimnol., 42, 483-495, 2009.
Piotrowska, N., Blaauw, M., Mauquoy, D., and Chambers, F. M.: Constructing deposition chronologies for peat deposits using radiocarbon dating, Mires and Peat 7, 10, available at: http://www.mires-and-peat.net/, 2011.
Piotrowska, N.: Status report of AMS sample preparation laboratory at GADAM Centre, Gliwice, Poland. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 294, 176-181, 2013.
Reimer, P. J., Baillie, M. G. L., Bard, E., Bayliss, A., Beck, J. W., Blackwell, P. G., Bronk Ramsey, C., Buck, C. E., Burr, G. S., Edwards, R. L., Friedrich, M., Grootes, P.M., Guilderson, T.P., Hajdas, I., Heaton, T. J., Hogg, A. G., Hughen, K. A., Kaiser, K. F., Kromer, B., McCormac, F. G., Manning, S. W., Reimer, R. W., Richards, D. A., Southon, J. R., Talamo, S., Turney, C. S. M., van der Plicht, J., and Weyhenmeyer, C. E.: IntCal09 and Marine09 radiocarbon age calibration curves, 0-50000 years cal BP, Radiocarbon 5, 1111-1150, 2009.
Roos-Barraclough, F., Martinez-Cortizas, A., GarcIa-Rodeja, E., and Shotyk, W.: A 14500 year record of the accumulation of atmospheric mercury in peat: volcanic signals, anthropogenic influences and a correlation to bromine accumulation, Earth Planet. Sci. Lett., 202, 435-451, 2002. (Pubitemid 35225032)
Sapkota, A.: Mineralogical, chemical, and isotopic (Sr, Pb) Composition of atmospheric mineral dusts in an ombrotrophic peat bog, Southern South America, PhD Thesis, Ruprecht-KarlsUniversität, Heidelberg, Germany, 2006.
Sapkota, A., Cheburkin, A. K., Bonani, G., and Shotyk, W.: Six mil-lenia of atmospheric dust deposition in southern South America (Isla Navarino, Chile), Holocene, 17, 561-572, 2007. (Pubitemid 47234463)
Shotyk, W.: Peat bog archives of atmospheric metal deposition: geo-chemical evaluation of peat profiles, natural variations in metal concentrations, and metal enrichment, Environ. Rev., 4, 149-183, 1996. (Pubitemid 126640627)
Shotyk, W., Weiss, D., Appleby, P. G., Cheburkin, A. K., Frei, R., Gloor, M., Kramers, J. D., Reese, S., and van der Knaap, W. O.: History of atmospheric lead deposition since 12, 370 14C yr BP recorded in a peat bog profile, Jura Mountains, Switzerland, Science, 281, 1635-1640, 1998.
Shotyk, W., Weiss, D., Kramers, J. D., Frei, R., Cheburkin, A. K., Gloor, M., and Reese, S.: Geochemistry of the peat bog at Etang de la Gruère, Jura Mountains, Switzerland, and its record of atmospheric Pb and lithogenic trace metals (Sc, Ti, Y, Zr, and REE) since 12, 370 14C yr BP, Geochim. Cosmochim. Acta, 65, 2337-2360, 2001. (Pubitemid 32704360)
Shotyk, W., Krachler M., Martinez-Cortizas, A., Cheburkin, A. K., and Emons, H.: A peat bog record of natural, pre-anthropogenic enrichments of trace elements in atmospheric aerosols since 12370 14C yr BP, and their variation with Holocene climate change, Earth Planet. Sci. Lett., 199, 21-37, 2002. (Pubitemid 34641986)
Sillasoo, U., Mauquoy, D., Blundell, A., Charman, D., Blaauw, M., Daniell, J. R. G., Toms, P., Newberry, J., Chambers, F. M., and Karofeld, E.: Peat multi-proxy data from Mannikjarve bog as indicators of late Holocene climate changes in Estonia, Boreas, 36, 20-37, 2007. (Pubitemid 46978663)
Sjogren, P.: The development of pasture woodland in the southwest Swiss Jura Mountains over 2000 years, based on three adjacent peat profiles, The Holocene, 16, 210-223, 2006.
Taylor S. R.: The Encyclopedia of Geochemistry and Environmental Sciences, Stroudsburg, Pennsylvania, 1972.
Taylor, S. R. and McLennan, S. M.: The Continental Crust: Its Composition and Evolution, Blackwell, Oxford, 1985.
Thompson, L. G., Mosley-Thompson, E., Davis, M., Lin, P.-N., Henderson, K. A., Cole-Dai, J., Bolzan, J. F., and Liu, K. B.: Late glacial stage and Holocene tropical ice core records from Huascaran, Peru, Science, 269, 46-50, 1995. (Pubitemid 26435845)
Thompson, L. G., Mosley-Thompson, E., Davis, M. E., Henderson, K. A., Brecher, H. H., Zagorodnov, V. S., Mashiotta, T. A., Lin, P.-N., Mikhalenko, V. N., Hardy, D. R., and Beer, J.: Ice core records: evidence of Holocene climate change in tropical Africa, Science, 298, 589-593, 2000.
Thompson, L. G., Mosley-Thompson, E., Davis, M. E., Lin, P. N., Henderson, K., and Mashiotta, T. A.: Tropical glacier and ice core evidence of climate change on annual to millennial timescales, Clim. Change, 59, 137-155, 2003. (Pubitemid 36914387)
Tegen, I., Werner, M., Harrison, S. P., and Kohfeld, K. E.: Relative importance of climate and land use in determining present and future global soil dust emission, Geophys. Res. Lett., 31, L05105, doi:10.1029/2003GL019216, 2004.
Väliranta, M., Korhola, A., Seppä, K. Tuittila, E.-S., Sarmaja-Korjonen, K., Laine, J., and Alm, J.: High-resolution reconstruction of wetness dynamics in a southern boreal raised bog, Finland, during the late Holocene: a quantitative approach, The Holocene, 17, 1093-1107, 2007;
Wanner, H., Beer, J., Butikofer, J., Crowley, T., Cubasch, U., Fluck-iger, J., Goosse, H., Grosjean, M., Joos, F., Kaplan, J. O., Kuttel, M., Muller, S., Pentice, C., Solomina, O., Stocker, T., Tarasov, P., Wagner, M., and Widmann, M.: Mid to late Holocene climate change-an overview, Quaternary Sci. Rev., 27, 1791-1828, 2008.
Wanner, H., Solomina, O., Grosjean, M., Ritz, S. P., and Jetel, M.: Structure and origin of Holocene cold events, Quaternary Sci. Rev., 30, 3109-3123, 2011.
Wardenaar E.: A new hand tool for cutting peat profiles, Revue canadienne de botanique, 65, 1771-1772, 1987.
Wastiaux, C. and Schumacker, R.: Topographie de surface et de subsurface des zones tourbeuses des réserves naturelles domaniales des Hautes-Fagnes. Rapport de synthèse. Convention C60 entre l'Université de Liège et le Ministère de la Région Wallonne (D.G.R.N.E.), rapport inédit: 52 p., 2003.
Ylirukanen, I. and Lehto, S.: The occurrence of rare earth elements in some Finnish mires, Bull. Geol. Soc. Finland, 67, 27-38, 1995. (Pubitemid 26475596)
Zdanowicz, C. M., Zielinski, G. A., Wake, C., Fisher, D. A., and Koerner, R. M.: A Holocene record of atmospheric dust deposition on the Penny Ice Cap, Baffin Island, Canada, Quaternary Res., 53, 62-69, 2000. (Pubitemid 30137387)