# name
Sample "integrity" - an evaluation of sample variability of soils around Rouyn-Noranda, Quebec

# metadata.dc.description[].value
In order to test sample integrity near a point source, a detailed soil sample collection site was established close the Horne smelter located at Rouyn - Noranda, Quebec.    We conclude that Humus geochemistry reflects non-uniform distribution of metal-rich smelter particulate,and indicates that site variability is an important factor in mapping the distribution of smelter particulates and in modeling particulate deposition.

# metadata.dc.description[].value
Afin de tester l'intégrité échantillon près d'une source ponctuelle, un site de collecte de l'échantillon du sol détaillé a été établi à proximité de la fonderie Horne à Rouyn situé - Noranda, Québec.  Nous concluons que l'humus reflète la distribution non uniforme de fonderieparticules riche en métal, et indique que le site variabilité est un facteur important dans la cartographie de la distribution des particules de la fonderie et dépôt de particules de modélisation.

# metadata.dc.description.abstract[].value
A detailed soil sample collection grid was established 3 km southwest of the Horne smelter at Rouyn - Noranda, Quebec.  The work supports interpretation of a regional geochemical survey of humus and soil within 100 km radius of the smelter and was designed to determinegeochemical variability at a site affected by smelter particulate deposition. Soils in the grid are luvisols formed on glacial lake silts and clays and overly pillowed volcanic bedrock.  Vegetation comprises small poplars and alders, with a fern ground cover; carbonized stumps and a thin layer ofcharcoal beneath humus indicate the site has been subject to fire.  Litterfall, humus, and B-horizon soil samples were collected at 10, 20, and 30m from the intersection of two perpendicular transects and at a point halfway between the 30m sample locations.  Three samples of each were collected atthe point of intersection. C-horizon soil was collected at the intersection, the 30m sites, and halfway between the 30m sample locations In preparation for ICP-AES geochemical analyses, litterfall and humus samples were macerated, and all samples sieved to <2mm.  The litterfall samples weredigested using perchloric acid, and all other samples using aqua-regia.  The B- and C-horizon soil samples were analysed in duplicate. A total of 48 analyses were carried out.Geochemical variation among litterfall, B-horizon, and C-horizon samples lies within the range of analytical variation, and trace metal concentrations (Cu, Pb, Zn, Ni, Cr) are 10s to 100s of ppm.  For non-smelter-related elements, such as Ni, humus concentrations are equivalent to those of C-horizonsoil.  For Cr, humus values are lower than those of C-horizon soil.  In contrast, smelter-related elements, Cu, Pb, and Zn, have humus concentrations that are 1000's of ppm, and range within a variability of several 1000 ppm across the site.Humus geochemistry reflects non-uniform distribution of metal-rich smelter particulate, and indicates that site variability is an important factor in mapping the distribution of smelter particulate and in modeling deposition.

# metadata.dc.identifier.citation[].value
Knight, R. D. & Hernderson, P. J. (2017). Sample "integrity" - an evaluation of sample variability of soils around Rouyn-Noranda, Quebec. Geological Survey of Canada, Scientific Presentation, 46, Natural Resources Canada. https://doi.org/10.4095/299343

# metadata.dc.title[].value
Sample "integrity" - an evaluation of sample variability of soils around Rouyn-Noranda, Quebec

# metadata.nrcan.meeting.name[].value
6th International Symposium on Environmental Geochemistry (ISEG)

# metadata.nrcan.serial.title[].value
Geological Survey of Canada, Scientific Presentation