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TitleAlong-slope variations in sediment lithofacies and depositional processes since the Last Glacial Maximum on the northeast Baffin margin, Canada
AuthorJenner, K A; Campbell, D CORCID logo; Piper, D J WORCID logo
SourceMarine Geology vol. 405, 2018 p. 92-107,
Alt SeriesNatural Resources Canada, Contribution Series 20170321
PublisherElsevier BV
Mediapaper; on-line; digital
File formatpdf (Adobe® Reader®); html
ProvinceNunavut; Northern offshore region
NTS16; 26A; 26G; 26H; 26I; 26J; 27; 28A; 28B; 28C; 28D; 28E; 28F; 37H; 38A; 38B; 38C; 38D
AreaBaffin Island; Baffin Bay; Davis Strait; Pond Inlet; Pangnirtung Fiord; Qikiqtarjuaq; Clyde River; Gibbs Fiord; Scott Inlet; Lancaster Sound; Home Bay
Lat/Long WENS -80.0000 -54.0000 75.0000 64.3333
Subjectsmarine geology; surficial geology/geomorphology; stratigraphy; geochronology; geophysics; Science and Technology; Nature and Environment; continental margins; continental shelf; continental slope; marine sediments; muds; sands; clays; turbidites; gravels; glacial deposits; landslide deposits; debris flow deposits; slumps; lithofacies; carbonates; geological history; depositional history; depositional environment; sediment dispersal; source areas; glacial history; glaciation; Wisconsinian glacial stage; ice margins; deglaciation; marine sediment cores; bioturbation; currents; turbidity currents; bottom currents; ice rafting; icebergs; basins; radiometric dating; radiocarbon dating; sedimentary structures; stratigraphic analyses; stratigraphic correlations; lithostratigraphy; paleoenvironment; troughs; geophysical interpretations; acoustic surveys, marine; grain size analyses; grain size distribution; Last Glacial Maximum; Baffin Margin; Baffin Shelf; Baffin Slope; Baffin Island Current; West Greenland Current; ice streams; limit of glaciation; colluvial and mass-wasting deposits; Phanerozoic; Cenozoic; Quaternary
Illustrationsgeoscientific sketch maps; location maps; geophysical profiles; tables; lithologic sections; correlation sections; photographs; geophysical images; plots
ProgramPublic Safety Geoscience Marine Geohazards
Released2018 07 26
AbstractTwelve piston cores were used to characterize late Quaternary lithofacies, depositional processes and deglacial history along the Baffin Bay slope between Lancaster Sound and Home Bay. Core investigations show four distinct laterally correlatable lithofacies along the slope - basal and upper diamicton, laminated red brown mud, tan carbonate gravelly, sandy mud and bioturbated brown mud. Basal diamicton largely represents glacigenic debris flow deposits during a glacial advance from Baffin Island at ~25 cal ka. The distribution and character of laminated red brown mud suggests a lateral supply to Baffin Bay slope from ice-proximal meltwater plumes and turbidity currents sourced in glacial ice from both Baffin Bay shelf and Home Bay between 41.5 cal ka to ~14.2 cal ka. An upper diamicton records a lesser, localized glacial advance that ended at about 14.2 cal ka. Tan carbonate mud events represent ice-rafted, enhanced detrital carbonate delivery to the slope between ~25 cal ka and ~11 cal ka. A gradual thinning of these events, from northern to southern Baffin Bay, corroborates a northern Baffin Bay, Lancaster Sound or Nares Strait iceberg source. Proglacial facies seaward of Home Bay contain beds with slightly elevated detrital carbonate that may represent the distal edge of carbonate ice-rafted from Lancaster Sound. Baffin Bay is a type example of a polar glacial basin in which direct glacial supply predominates over the effects of glacial meltwater. As a result, axial supply from the large ice streams north of Baffin Bay (particularly Lancaster Sound) is dominant in the Baffin Bay basin and lateral supply from smaller ice streams on Baffin Island predominates on the NE Baffin Slope.
Summary(Plain Language Summary, not published)
Thirteen piston cores characterize Late Quaternary lithofacies, depositional processes and deglacial history along the Baffin Bay slope between Lancaster Sound and Home Bay.

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