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TitreGeochemical landscapes
TéléchargerTéléchargement (publication entière)
AuteurGrunsky, E C; McNeil, R J; Garrett, R G
SourcePresentations and recommendations from the workshop on the role of geochemical data in environmental and human health risk assessment, Halifax, 2010; par Rencz, A N (éd.); Kettles, I M (éd.); Commission géologique du Canada, Dossier public 6645, 2011 p. 16; 1 CD-ROM, https://doi.org/10.4095/287940
LiensCanadian Database of Geochemical Surveys, downloadable files
LiensBanque de données de levés géochimiques du Canada, fichiers téléchargeables
Année2011
ÉditeurRessources naturelles Canada
RéunionWorkshop on the role of geochemical data in environmental and human health risk assessment; Halifax; CA; mars 17-18, 2010
Documentdossier public
Lang.anglais
DOIhttps://doi.org/10.4095/287940
MediaCD-ROM; en ligne; numérique
Référence reliéeCette publication est contenue dans Rencz, A N; Kettles, I M; (2011). Presentations and recommendations from the workshop on the role of geochemical data in environmental and human health risk assessment, Halifax, 2010, Commission géologique du Canada, Dossier public 6645
Référence reliéeCette publication est reliée Friske, P W B; Ford, K L; Kettles, I M; McCurdy, M W; McNeil, R J; Harvey, B A; (2010). North American soil geochemical landscapes project: Canadian field protocols for collecting mineral soils and measuring soil gas radon and natural radioactivity, Commission géologique du Canada, Dossier public 6282
Référence reliéeCette publication est contenue dans Rencz, A N; Kettles, I M; (2011). Presentations and recommendations from the workshop on the role of geochemical data in environmental and human health risk assessment, Halifax, 2010, Commission géologique du Canada, Dossier public 6645
Formatspdf
ProvinceColombie-Britannique; Alberta; Saskatchewan; Manitoba; Ontario; Québec; Nouveau-Brunswick; Nouvelle-Écosse; Île-du-Prince-Édouard; Terre-Neuve-et-Labrador; Territoires du Nord-Ouest; Yukon; Nunavut
SNRC1; 2; 3; 10; 11; 12; 13; 14; 15; 16; 20; 21; 22; 23; 24; 25; 26; 27; 28; 29; 30; 31; 32; 33; 34; 35; 36; 37; 38; 39; 40; 41; 42; 43; 44; 45; 46; 47; 48; 49; 52; 53; 54; 55; 56; 57; 58; 59; 62; 63; 64; 65; 66; 67; 68; 69; 72; 73; 74; 75; 76; 77; 78; 79; 82; 83; 84; 85; 86; 87; 88; 89; 92; 93; 94; 95; 96; 97; 98; 99; 102; 103; 104; 105; 106; 107; 114O; 114P; 115; 116; 117; 120; 340; 560
Lat/Long OENS-141.0000 -50.0000 90.0000 41.7500
Sujetsanalyse environnementales; etudes de l'environnement; effets sur l'environnement; géochimie du sol; sols; études pédologiques; échantillons de sol; propriétés du sol; contamination des métaux lourds; pollution; substances polluantes; biogéochimie; levés biochimiques; levés géochimiques; géochimie; pédologie; géologie de l'environnement; Cénozoïque; Quaternaire
Consultation
Endroit
 
Bibliothèque de Ressources naturelles Canada - Ottawa (Sciences de la Terre)
 
Bibliothèque de Ressources naturelles Canada - Calgary (Sciences de la Terre)
 
Commission géologique du Canada (Atlantique)
 
Bibliothèque de Ressources naturelles Canada - Vancouver (Sciences de la Terre)
 
Bibliothèque de Ressources naturelles Canada - Québec (Sciences de la Terre)
 
ProgrammeEcosystems Risk Characterization, Géoscience de l'environnement
Diffusé2011 01 01
Résumé(disponible en anglais seulement)
A geochemical landscape is the geochemical characterization of a given part of the earth based on the joint influence of climate, relief, geology and vegetation on the chemical processes over a region. The primary purposes for assessing geochemical landscapes are for: agriculture, mineral exploration, environmental and human health studies and are carried out through geochemical surveys.
The scale of a geochemical survey determines the sampling density and is generally focused on the scale of the geochemical process that is being measured. A rule of thumb is that the sample density should be 1/2 the size of the geochemical target being sought. Sample density and the spatial extent of a geochemical survey dictate the overall number of sites for the survey,
Influences on the geochemistry of soils in Canada are characterized by the ecozone classification, regional bedrock geology and soils. The North American Soil Geochemical Landscapes Project (NASGLP) was designed to capture the geochemical variability of the continent at the Ecoprovince level at a spacing of one sample site per 40 km2. Sample design is an essential element of a geochemical survey. There are at least two ways to design a geochemical survey that is statistically defensible. The Generalized Random Tesselation Stratified Design (GRTS) is based on a spatially balanced selection of points over an area. Alternatively, an unbalanced, nested random sample design based on a designated sample resolution permits the use of statistical techniques such as analysis of variance to test the representivity of the data.
Ecoregion designation is well established across Canada at the zone, region and district levels. Soil and bedrock geology maps have been compiled by various provincial territorial agencies but are not continuous across the country.
The vertical profile of soils varies widely across the country. Northern soils are dominantly cyrosols and brunosols. Both the west coast and eastern part of Canada are dominated by podzolic soils and the western interior plains are dominated by chernozemic and luvisolic soils. The nature of the soil profile plays a role in the geochemical response that is observed from the base of the C horizon to the upper most layers.
GEOSCAN ID287940