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Andrews, John T; Dunhill, Gita; Vogt, Christoph; Voelker, Antje H L (2017): Age determination, bulk mineral assemblage and sedimentology of sediment cores North and South of the Denmark Strait [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.876078, Supplement to: Andrews, JT et al. (2017): Denmark Strait during the Late Glacial Maximum and Marine Isotope Stage 3: Sediment sources and transport processes. Marine Geology, 390, 181-198, https://doi.org/10.1016/j.margeo.2017.07.003

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Published: 2017-06-09 • DOI registered: 2017-07-17

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Abstract:
The sediment records from north and south of Denmark Strait (cores PS2644 and MD99-2323) and on the Kangerlussuaq Trough Mouth Fan (KTMF) (MD99-2260) are evaluated for the period 12 to 60 cal ka BP with the goal of evaluating: 1) the relative roles of the Greenland and Iceland Ice Sheets in sediment composition, 2) the processes of sediment supply, and 3) the relationship, if any, between the atmospheric derived ice core records and glacial marine sediment history. These questions were addressed using counts of coarse (> 2 mm) ice rafted debris (IRD), magnetic susceptibility, grain-size spectra, and sediment mineral composition. A significant difference in these variables occurred between MS3 and MIS2, with the latter showing small to modest abrupt changes in felsic and mafic minerals and in IRD, compared to larger and less variable changes during MIS2. The dominant bedrock source archived in the cores is the Cenozoic basaltic outcrops from East Greenland and Iceland (~60%) but there are frequent pulses of felsic-rich sediments (~17-36%), which coincided with Greenland stadials. There is also a persistent detrital carbonate input. The largest shift in most sediment proxies occurred ~28-30 cal ka BP reflecting the sustained expansion of the ice sheets. The grain-size spectra on the Snorri Drift (MD99-2323) reflected complex depositional histories involving the supply of poorly sorted glacially derived sediment (sand, silt, and clay) and reworking by bottom currents.
Coverage:
Median Latitude: 65.821280 * Median Longitude: -27.250907 * South-bound Latitude: 64.905000 * West-bound Longitude: -30.250000 * North-bound Latitude: 67.868333 * East-bound Longitude: -21.758333
Date/Time Start: 1994-09-19T06:44:00 * Date/Time End: 1999-08-01T00:00:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
16 datasets

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Datasets listed in this publication series

  1. Andrews, JT; Dunhill, G; Vogt, C et al. (2017): Age determination of sediment core HU93030-007. https://doi.org/10.1594/PANGAEA.876047
  2. Andrews, JT; Dunhill, G; Vogt, C et al. (2017): Age determination of sediment core JM96-1222/1-GC. https://doi.org/10.1594/PANGAEA.876049
  3. Andrews, JT; Dunhill, G; Vogt, C et al. (2017): Age determination of sediment core JM96-1222/2-GC. https://doi.org/10.1594/PANGAEA.876050
  4. Andrews, JT; Dunhill, G; Vogt, C et al. (2017): Bulk mineral assemblage via Quantitative Phase Analysis with X-ray diffraction of sediment core JM96-1222-2. https://doi.org/10.1594/PANGAEA.876061
  5. Andrews, JT; Dunhill, G; Vogt, C et al. (2017): Age determination of sediment core JM96-1225/2-GC. https://doi.org/10.1594/PANGAEA.876419
  6. Andrews, JT; Dunhill, G; Vogt, C et al. (2017): Age determination of sediment core JM96-1228/1-GC. https://doi.org/10.1594/PANGAEA.876058
  7. Andrews, JT; Dunhill, G; Vogt, C et al. (2017): Age determination of sediment core JM96-1229/1-GC. https://doi.org/10.1594/PANGAEA.876059
  8. Andrews, JT; Dunhill, G; Vogt, C et al. (2017): Age determination of sediment core MD99-2260. https://doi.org/10.1594/PANGAEA.876054
  9. Andrews, JT; Dunhill, G; Vogt, C et al. (2017): Bulk mineral assemblage with X-ray diffraction of sediment core MD99-2260. https://doi.org/10.1594/PANGAEA.876067
  10. Andrews, JT; Dunhill, G; Vogt, C et al. (2017): Sedimentology of sediment core MD99-2260. https://doi.org/10.1594/PANGAEA.876065
  11. Andrews, JT; Dunhill, G; Vogt, C et al. (2017): Age determination of sediment core MD99-2323. https://doi.org/10.1594/PANGAEA.876055
  12. Andrews, JT; Dunhill, G; Vogt, C et al. (2017): Bulk mineral assemblage with X-ray diffraction of sediment core MD99-2323. https://doi.org/10.1594/PANGAEA.876068
  13. Andrews, JT; Dunhill, G; Vogt, C et al. (2017): Sedimentology of sediment core MD99-2323. https://doi.org/10.1594/PANGAEA.876076
  14. Andrews, JT; Dunhill, G; Vogt, C et al. (2017): Content of sand (>63 µm) of sediment core PS2644-2. https://doi.org/10.1594/PANGAEA.876445
  15. Andrews, JT; Dunhill, G; Vogt, C et al. (2017): Bulk mineral assemblage with X-ray diffraction of sediment core PS2644-5. https://doi.org/10.1594/PANGAEA.876077
  16. Andrews, JT; Dunhill, G; Vogt, C et al. (2017): Content of sand (>63 µm) of sediment core PS2644-5. https://doi.org/10.1594/PANGAEA.876446