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TitlePolyphase glacial dynamics and clast dispersal patterns in glaciofluvial and glacial sediments in north-central Quebec, with application to diamond exploration
DownloadDownload (whole publication)
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorParent, M
SourceSurficial geology of northern Canada: a summary of Geo-mapping for Energy and Minerals program contributions; by McMartin, IORCID
logo (ed.); Geological Survey of Canada, Bulletin 611, 2023 p. 201-219, Open Access logo Open Access
PublisherNatural Resources Canada
Mediaon-line; digital
RelatedThis publication is contained in Surficial geology of northern Canada: a summary of Geo-mapping for Energy and Minerals program contributions
File formatreadme
File formatpdf
NTS23M; 23N; 24C; 24D; 33N; 33O; 33P; 34A; 34B; 34C
Lat/Long WENS -78.0000 -68.0000 57.0000 55.0000
SubjectsScience and Technology; sedimentology; Nature and Environment; mineralogy; surficial geology/geomorphology; diamond; ice sheets; kimberlites
Illustrationslocation maps; diagrams; graphs; charts; tables
ProgramGEM2: Geo-mapping for Energy and Minerals GEM Synthesis
Released2023 02 16
AbstractThe regional dynamics of shifting ice-flow directions and ice-divide migrations were estab-lished in the Saindon-Cambrien corridor of north-central Quebec by two independent means: 1) the measurement of crosscutting striations; and 2) the glacial dispersal patterns of distinctive lithological markers from outliers of the Sakami Formation. Clasts from two outliers were successively dispersed to the north-northeast, northwest, and west-southwest. They form composite dispersal trains consisting of 200 km long ribbon-shaped trains toward the west-southwest and palimpsest trains caused by the westward re-entrainment of dispersal trains formed during earlier flow phases. Widespread evidence of basal sliding and abrasion recorded by striations associated with successive flow systems, together with the development of long dispersal trains, indicates that protracted warm-based conditions prevailed in north-central Quebec. This improved understanding of glacial dynamics and dispersal in the core region of the eastern Laurentide Ice Sheet helps us to interpret the distribution of legacy kimberlite indicator mineral data sets in eskers and to assess the diamond prospectivity of the Saindon-Cambrien corridor.
Summary(Plain Language Summary, not published)
This study was conducted under phase 2 of TGI and its objective was to assess the prospectivity of this region (Saindon-Cambrien Corridor) for diamond exploration. The prime reconnaissance method is to assess the presence of KIMs (kimberlite indicator minerals) in a loosely spaced set of glaciofluvial and glacial samples, kimberlite being the main rock type to potentially contain diamonds. This method of exploration is the most effective one in glaciated Shield terrains of northern Canada. KIMs were recovered in this region of northern Québec and this prompted exploration firms to stake claims in areas of KIM clusters. This study also provides a reconstruction of ice-flow history as well as dispersal patterns/models in glacial and glaciofluvial sediments of the region. Such ice-flow data and models constitute key information for any firm conducting mineral exploration projects in Shield areas of northern Canada. This is particularly true in the case of diamond exploration surveys, as standard geochemical and geophysical methods are much less effective than KIMs in reconnaissance surveys.

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