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TitleRemote sensing of geochemical anomalies related to ultrabasic rocks and gold and uranium mineralization
AuthorBelanger, J R
SourceCanadian Journal of Remote Sensing vol. 17, no. 2, 1991 p. 112-121,
Alt SeriesGeological Survey of Canada, Contribution Series 11790
PublisherInforma UK Limited
Mediapaper; on-line; digital
File formatpdf
ProvinceQuebec; Saskatchewan
NTS21E/14; 21L/03; 64D; 64E
AreaThetford Mines; Star Lake; Wollaston Lake
Subjectsmetallic minerals; geochemistry; geophysics; remote sensing; prospecting; vegetation; geochemical surveys; gold; satellite imagery; landsat; landsat imagery; uranium; mineralization; ultramafic rocks; ultrabasic rocks; geobotanical surveys; igneous rocks; lower ordovician; nickel geochemistry; gold geochemistry; uranium geochemistry; biogeochemical surveys; Ordovician; Precambrian
Illustrationssketch maps; charts; photographs
Released2014 08 01
AbstractProspecting methods involving the study of vegetation, such as geobotany, biogeochemistry, and remote sensing, are based on the principle that plants draw their nutrients from elements present in the soil and should therefore reflect the chemical composition of the soil around them. A study in southeast Québec has shown that the high concentration of ultrabasic debris in the glacial till affects the distribution of tree species and also causes vegetation stress, such as a decrease in chlorophyll production, late leaf development in the spring, and early senescence in the fall. At Star Lake, Saskatchewan, it was not possible to identify any geochemical anomalies, as these are relatively small and the mineralization associated with gold occurrences (quartz-filled fractures) is not toxic to plants. In the Wollaston Lake area, Saskatchewan, preliminary results of multidate Landsat imagery show that uranium anomalies in vegetation can be detected by remote sensing.