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TitleIdentification of iron-rich components in bedrock and till from multispectral satellite imaging in support of geoscience mapping of Hall Peninsula, Baffin Island, Nunavut
AuthorBudkewitsch, P; Bilodeau, C; Senkow, M D
SourceCanada-Nunavut Geoscience Office, Summary of Activities 2012, 2013 p. 85-92
PublisherCanada-Nunavut Geoscience Office
Mediapaper; on-line; digital
File formatpdf
NTS25I; 25J; 25O; 25P; 26A; 26B
AreaBaffin Island; Hall Peninsula
Lat/Long WENS -68.0000 -64.0000 65.0000 62.5000
Subjectsgeophysics; geochemistry; bedrock geology; tills; iron geochemistry; satellite imagery; sulphides; ultramafic rocks; oxidation; gossans
Illustrationssketch maps
AbstractThis study is part of the Canada-Nunavut Geoscience Office's Hall Peninsula Integrated Geoscience Program, a multiyear bedrock and surficial geology mapping program with associated thematic studies. RapidEye multispectral satellite data provide relatively high spatial resolution and large area coverage, making it a suitable sensor for providing information to support geological mapping at a reconnaissance scale. A preliminary analysis was performed on Hall Peninsula in order to highlight the presence of iron oxides and hydroxides commonly associated with gossans. Numerous sites of interest, ranging from a few pixels covering several tens of square metres to larger areas representing hundreds of square metres, were identified and validated by field visits. A range of geological material types was recognized. The most common were iron oxides from weathered metasedimentary units containing disseminated sulphides. Other localities correlate with localized occurrences of ultramafic rock that were previously unmapped.