Bukar, Shettima; von Dobeneck, Tilo: Grain-size distribution and grain-size dependent magnetic susceptibility of sediment core GeoB18530-1 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.971771 (dataset in review), In: von Dobeneck, Tilo; Bukar, Shettima: Rock magnetic, geochemical and sedimentological properties related to IRD composition and content of sediment core GeoB18530-1 [dataset bundled publication]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.971785 (dataset in review)
Abstract:
Since the weight percentages of (classifiable) IRD particles > 1 mm and (unclassifiable, but separable) IRD particles > 125 µm both largely underestimate the total content and magnetic impact of IRD, it is important to quantify also the finer IRD fractions and their magnetic susceptibilities. From each of the IRD-rich sediment units H1, I1 and H2, six magnetic cube samples of 6.2 cm³ each were combined, dried, weighed and ultrasonically suspended in water. These three slurries were successively washed through 16 stacked sieves with mesh sizes in approximately 0.5 phi steps from 4000 µm to 5 µm using a Fritsch wet sieve shaker. The sieve fractions were carefully collected, dried, weighed and measured in a Kappabridge KLY2 susceptometer. The data and therefrom-derived partial susceptibilities and cumulative distributions clearly demonstrate that the magnetically most dominant and "volatile" sediment particles fall into the 40-125 µm range. Detrital particles of such sizes are too coarse to have been current-transported over long distances and were therefore probably at least partially ice-rafted.
Keyword(s):
Related to:
Bukar, Shettima; von Dobeneck, Tilo; Wang, Yiyun; Frederichs, Thomas; Dallanave, Edoardo; St-Onge, Guillaume (submitted): Ice-Rafted Detritus (IRD) of the SE Grand Banks Slope, Newfoundland, Throughout Heinrich Layers 1 to 6 - Part II: Magnetic Properties. Geochemistry, Geophysics, Geosystems
References:
von Dobeneck, Tilo; Bukar, Shettima: Petrological classification and lithology-specific abundance analysis of ice-rafted detritus (IRD) of sediment core GeoB18530-1 [dataset bundled publication]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.971290
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
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: 5.8330 m * Maximum DEPTH, sediment/rock: 6.6035 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 6.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Calculated | Geocode | |
| 2 | Depth, sediment/rock, top/minimum | Depth sed top | m | Wang, Yiyun | six pooled 6.2 cm³ cube samples | |
| 3 | Depth, sediment/rock, bottom/maximum | Depth sed bot | m | Wang, Yiyun | six pooled 6.2 cm³ cube samples | |
| 4 | Heinrich event | Heinrich event | Bukar, Shettima | HE stratigraphy based on Ca/Sr | ||
| 5 | Grain size, minimum | Grain size min | µm | Bukar, Shettima | Wet sieve shaker | 200 mm Ø nylon and inox sieves |
| 6 | Grain size, maximum | Grain size max | µm | Bukar, Shettima | Wet sieve shaker | 200 mm Ø nylon and inox sieves |
| 7 | Size fraction | Size fraction | % | Bukar, Shettima | Precision scale, Sartorius | Accuracy 0.1 mg |
| 8 | Magnetic susceptibility | MAGS | m3/kg | Bukar, Shettima | Kappabridge, AGICO KLY-2 |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
336 data points