Bukar, Shettima; von Dobeneck, Tilo; Max, Lars; Lenz, Marlene M; Mulitza, Stefan (2025): Extended age model of sediment core GeoB18530-1 by correlation of δ18O record to NGRIP chronology [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.971262, In: von Dobeneck, Tilo; Bukar, Shettima (2025): Petrological classification and lithology-specific abundance analysis of ice-rafted detritus (IRD) of sediment core GeoB18530-1 [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.971290
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Published: 2025-10-20 • DOI registered: 2025-11-18
Abstract:
The previously published 14C-AMS based chronology of GeoB18530-1 by Max et al. (2022; doi:10.1594/PANGAEA.943562), covering the upper 0 - 7.16 m core section down to Heinrich Event layer H2, was revised and extended to the full core length of 10.64 m, including now also Heinrich Event layers H3 to H5a. The age model was first extended back to 34.6 ka using two older 14C AMS dates by Lars Max (doi:10.1594/PANGAEA.943562). This radiocarbon chronology now covers H1 – H3 within inferred age brackets of 15.3 to 17.3 ka (H1), 23.3 to 25.3 ka (H2) and 28.5 to 30.5 ka (H3) respectively. The ages of the older Heinrich Event layers H4 – H5a were obtained by correlating the Ca/Sr and d18O records to the NGRIP chronology, obtaining age brackets of 38.3 to 39.8 ka (H4), 47.2 to 49.0 ka (H5) and 55.9 to 56.2 ka (H5a). Between these age tie points, we linearly interpolated sediment ages in 1 cm depth increments and assigned Heinrich Event numbers (H1 to H5a) and (Heinrich-related) interlayer numbers (I1 to I6) to the respective stratigraphic units.
Related to:
Bukar, Shettima; Lisker, Frank; von Dobeneck, Tilo; Max, Lars; Wang, Yiyun; Lenz, Marlene M; Mulitza, Stefan; St-Onge, Guillaume (2025): Ice-Rafted Detritus of the Southeast Grand Banks Slope, Newfoundland, Throughout Heinrich Layers 1 to 5a: 1. Petrology and Abundance. Geochemistry, Geophysics, Geosystems, 26(10), e2024GC011930, https://doi.org/10.1029/2024GC011930
Source:
Max, Lars; Nürnberg, Dirk; Chiessi, Cristiano Mazur; Lenz, Marlene M; Mulitza, Stefan (2022): Age determination of sediment core GeoB18530-1 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.943562
Max, Lars; Nürnberg, Dirk; Chiessi, Cristiano Mazur; Lenz, Marlene M; Mulitza, Stefan (2022): Subsurface ocean warming preceded Heinrich Events. Nature Communications, 13, https://doi.org/10.1038/s41467-022-31754-x
Project(s):
Funding:
German Research Foundation (DFG), grant/award no. 221211316: GRK/IRTG 1904: ArcTrain - Processes and impacts of climate change in the North Atlantic Ocean and the Canadian Arctic
German Research Foundation (DFG), grant/award no. 395191400: Links between subpolar Northwest Atlantic surface to deep ocean variability and Atlantic Meridional Overturning Circulation since the Last Glacial Maximum
Petroleum Technology Development Fund (PTDF), grant/award no. Shettima Bukar: Overseas postgraduate scholarship to Shettima Bukar
Coverage:
Latitude: 42.839500 * Longitude: -49.234833
Date/Time Start: 2014-06-14T13:58:00 * Date/Time End: 2014-06-14T13:58:00
Minimum DEPTH, sediment/rock: 0.010 m * Maximum DEPTH, sediment/rock: 10.399 m
Event(s):
GeoB18530-1 (509-1) * Latitude: 42.839500 * Longitude: -49.234833 * Date/Time: 2014-06-14T13:58:00 * Elevation: -1888.0 m * Recovery: 10.74 m * Location: SE Grand Banks Slope * Campaign: MSM39 * Basis: Maria S. Merian * Method/Device: Gravity corer (GC)
Comment:
Corresponds to Figure 3.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Lenz, Marlene M | Geocode – Syringe sample depth for d18O | |
| 2 | AGE | Age | ka BP | Bukar, Shettima | Age model, composite | Geocode – Radiocarbon and NGRIP correlation |
| 3 | Neogloboquadrina pachyderma sinistral, δ18O | N. pachyderma s δ18O | ‰ PDB | Lenz, Marlene M | Mass spectrometer, Finnigan, MAT 253 | Extension of doi:10.1594/PANGAEA.943560 |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
143 data points