Naafs, Bernhard David A; Hefter, Jens; Stein, Ruediger (2013): Biomarker and XRD results for the last 3.4 Ma from IODP Site 306-U1313 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.818094, Supplement to: Naafs, BDA et al. (2013): Millennial-scale ice rafting events and Hudson Strait Heinrich(-like) Events during the late Pliocene and Pleistocene: a review. Quaternary Science Reviews, 80, 1-28, https://doi.org/10.1016/j.quascirev.2013.08.014
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Abstract:
Various types of abrupt/millennial-scale climate variability such as Dansgaard/Oeschger and Heinrich Events characterized the last glacial period. Over the last decade, a number of studies demonstrated that such millennial-scale climate variability was not limited to the last glacial but inherent to Quaternary climate. Here we review the occurrence and origin of millennial ice-rafting events in the North Atlantic during the late Pliocene and Pleistocene (last 3.4 Ma) with a special focus on North Atlantic Hudson Strait (HS) Heinrich(-like) Events.
Besides a clear biomarker signature, we show that Heinrich Layers 5, 4, 2, and 1 in marine sediment cores from across the North Atlantic all bear the organic geochemical fingerprint of the Hudson area. Using this framework and combining previously published results, detailed investigations into the organic and inorganic chemistry of ice-rafted debris (IRD) found across the North Atlantic demonstrate that prior to MIS 16 (~ 650 ka) IRD in the North Atlantic did not originate from the Hudson area of northern Canada. The signature of this early IRD is distinctly different compared to that of HS Heinrich Layers. Rather ice-rafting events during the late Pliocene and early Pleistocene predominantly emanated from the calving of the Greenland and Fennoscandian ice sheets and possibly minor contributions from local ice streams from the North American and British ice sheets. Compared to North Atlantic HS Heinrich Events, these early Pleistocene IRD-events had a limited impact on surface water characteristics in the North Atlantic. North Atlantic HS Heinrich(-like) Events first occurred during MIS 16. At the same time, the dominant frequency in silicate-rich IRD accumulation shifted from the obliquity (41-ka) to a 100-ka frequency across the North Atlantic. Iceberg survivability or a change in iceberg trajectory likely did not control this change in IRD-regime. These results lend further support for the existing hypothesis that an increase in size (thickness) of the Laurentide ice sheet controls the occurrence of North Atlantic HS Heinrich Events, favoring an internal dynamic mechanism for their occurrence.
Project(s):
Coverage:
Latitude: 41.000000 * Longitude: -32.957300
Date/Time Start: 2004-03-28T00:00:00 * Date/Time End: 2004-04-02T00:00:00
Event(s):
306-U1313 * Latitude: 41.000000 * Longitude: -32.957300 * Date/Time Start: 2004-03-28T00:00:00 * Date/Time End: 2004-04-02T00:00:00 * Elevation: -3426.0 m * Campaign: Exp306 (North Atlantic Climate 2) * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE)
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3 datasets
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Datasets listed in this publication series
- Naafs, BDA; Hefter, J; Stein, R (2013): Dolomite/calcite and quartz/calcite ratios of IODP Hole 306-U1313B. https://doi.org/10.1594/PANGAEA.818093
- Naafs, BDA; Hefter, J; Stein, R (2013): Sea surface temperatures and Biomarker abundance in the 0-1 Ma section of IODP Hole Site 306-U1313. https://doi.org/10.1594/PANGAEA.818090
- Naafs, BDA; Hefter, J; Stein, R (2013): Sea surface temperatures and Biomarker abundance in the 1-3.5 Ma section of IODP Hole Site 306-U1313. https://doi.org/10.1594/PANGAEA.818091