GEOSCAN Search Results: Fastlink


TitleTransport of suspended particulate matter in an Antarctic fjord
AuthorDomack, E W; Foss, D J P; Syvitski, J P M; McClennen, C E
SourceMarine Geology vol. 121, issue 3-4, 1994 p. 161-170,
Alt SeriesGeological Survey of Canada, Contribution Series 12593
PublisherElsevier BV
Mediapaper; on-line; digital
File formatpdf
Lat/Long WENS -61.3333 -61.0000 -64.2500 -64.3333
Subjectswater temperature; salinity; sediment transport; sands; quartz; grain size analysis; silts; bottom sediments; turbidity currents; turbidity; fjords
Illustrationslocation maps; graphs; photomicrographs; schematic cross-sections
AbstractVertical profiles of temperature, salinity, and light attenuation were used in conjunction with underwater photography and water samples to characterize the nature and dynamics of particle transport in an Antarctic fjord. Most of the particles are sand sized (0.1-2 mm) floccules comprised of individual grains in the 5 to 50 pm size range. The quartz silt grains are derived from basal, debris laden meltwater originating from beneath the submerged valley glacier. The meltwater buoyantly rises to form cold water interflows at mid water depths. Turbulent mixing near the seafloor also plays a role in the transport and break-up of floccules. Together the midwater cold tongues and near-bottom turbidity account for 87% of the total sediment load thus attesting to the importance of non-surface transport mechanisms in
polar fjords.