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| Andrews, J. T.; Barber, D. C.; Jennings, A. E.; Eberl, D. D.; Maclean, B.; Kirby, M. E.; Stoner, J. S.. |
| Core HU97048-007PC was recovered from the continental Labrador Sea slope at a water depth of 945?m, 250?km seaward from the mouth of Cumberland Sound, and 400?km north of Hudson Strait. Cumberland Sound is a structural trough partly floored by Cretaceous mudstones and Paleozoic carbonates. The record extends from similar to 10 to 58?ka. On-board logging revealed a complex series of lithofacies, including buff-colored detrital carbonate-rich sediments [Heinrich (H)-events] frequently bracketed by black facies. We investigate the provenance of these facies using quantitative X-ray diffraction on drill-core samples from Paleozoic and Cretaceous bedrock from the SE Baffin Island Shelf, and on the?<?2-mm sediment fraction in a transect of five cores from... |
| Tipo: Text |
Palavras-chave: Baffin Bay; Detrital carbonate (DC-) events; Heinrich events; Labrador Sea; Laurentide Ice Sheet. |
| Ano: 2012 |
URL: https://archimer.ifremer.fr/doc/00265/37644/35823.pdf |
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| Rashid, H.; Saint-ange, Francky; Barber, D. C.; Smith, M. E.; Devalia, N.. |
| Heinrich iceberg-rafting events 1 and 2 (H1 and H2) in the Labrador Sea are identified by their typical nepheloid-flow deposit sedimentary structure, high bulk carbonate, increase in iceberg-rafted detritus (IRD), and depletion of delta O-18 in the surface-dwelling foraminifer, Neogloboquadrina pachyderma (s). H-layers in this region have sedimentological characteristics different than those in the North Atlantic, and consist of IRD interspersed in pelagic sediments. High resolution C-14-AMS dates allowed us to delineate the leads and lags in instability between different ice-streams of the former Laurentide ice-sheet (LIS). Our data suggest that the discharge from the Hudson Strait ice-stream was followed by Cumberland Sound ice-sheet during H1 and H2.... |
| Tipo: Text |
Palavras-chave: Heinrich iceberg-rafting; Radiogenic isotopes; Cumberland sound ice-shelf; Hudson Strait ice-stream; Trinity Trough ice-stream. |
| Ano: 2012 |
URL: https://archimer.ifremer.fr/doc/00265/37641/36841.pdf |
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