| Titre | Lead concentrations and isotope ratios in the exchangeable fraction: tracing soil contamination near a copper smelter |
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| Auteur | Hou, X; Parent, M; Savard, M M ; Tassé, N; Bégin, C; Marion, J |
| Source | Geochemistry: Exploration, Environment, Analysis vol. 6, no. 2-3, 2006 p. 229-236, https://doi.org/10.1144/1467-7873/05-092 |
| Année | 2006 |
| Séries alt. | Commission géologique du Canada, Contributions aux publications extérieures 2003193 |
| Éditeur | Geological Society of London |
| Document | publication en série |
| Lang. | anglais |
| DOI | https://doi.org/10.1144/1467-7873/05-092 |
| Media | papier; en ligne; numérique |
| Formats | html; pdf |
| Province | Québec |
| SNRC | 32C/12; 32C/13; 32C/14; 32D/02; 32D/03; 32D/06; 32D/07; 32D/08; 32D/09; 32D/10; 32D/16; 32F/04 |
| Région | Rouyn-Noranda |
| Lat/Long OENS | -79.5000 -77.0000 49.2500 48.0000 |
| Sujets | pollution; cuivre; fonderies; plomb; rapports isotopiques; rapports des isotopes de plomb; isotopes; etudes de l'environnement; analyse environnementales; effets sur l'environnement; contamination des
métaux lourds; métaux; géochimie des métaux lourds; datations au plomb-plomb; géochimie du sol; études pédologiques; géologie de l'environnement; géochimie; minéraux métalliques; pédologie |
| Illustrations | croquis cartographiques; profils; graphiques |
| Programme | Les métaux dans l'environnement (MEDE) |
| Programme | INRS Institut national de la recherche scientifique, Centre Eau, Terre & Environnement, Programme de financement |
| Diffusé | 2006 06 14 |
| Résumé | (disponible en anglais seulement)
A total of 75 soil samples were collected from podzolic soils at eight sites in northwestern Quebec in order to compare results in contaminated locations near
the Horne Copper smelter in Rouyn-Noranda with those near Hudson Bay, 800 km further north, and a priori devoid of pollution. Lead concentrations and Pb isotopic compositions were determined on soil samples leached by 0.25 M HCl. Lead is enriched in
the surface organic horizons at all sites in Rouyn-Noranda. Its concentration decreases abruptly from the surface organic horizons to the underlying mineral horizons. The 206Pb/207Pb ratios are low in surface organic horizons, and they increase
sharply in the mineral horizons. Along a NE–SW transect, the highest average Pb concentration (869 ppm) in organic horizons is found at the test site, 9 km from the smelter. The lowest average of 39 ppm Pb in surface organic layers is accompanied by
the highest average 206Pb/207Pb ratio (1.15) at site 5, 116 km NE of the Horne smelter. At the test site, the highest Pb concentration of 1414 ppm is also accompanied by the lowest 206Pb/207Pb ratio (0.98), which is close to the isotopic composition
of Noranda galena (206Pb/207Pb=0.92). Both Pb concentration and isotopic composition indicate that the Horne smelter is the main source of Pb contamination of soils in the Rouyn-Noranda region. The two soil profiles from near Hudson Bay display much
lower Pb concentration and different trends of isotope
ratios with depth. |
| GEOSCAN ID | 214875 |
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