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:
The IRD-rich Heinrich Event (HE) layers of gravity core GeoB18530-1, retrieved from the SE Grand Banks slope of Newfoundland, coincide with bulk magnetic susceptibility maxima. This positive correlation of IRD content and susceptibility is widely observed and at first glance contradictive, since detrital dolomite, the most common IRD component, is weakly magnetic and should therefore reduce rather than enhance bulk magnetic susceptibility. As Part I of the associated manuscripts (Bukar et al., submitted) showed, the petrology of HLs is rather diverse; some prominent magmatic and metamorphic IRD species should actually have relatively high magnetic susceptibilities. This data set bundle comprises a collection of bulk rock magnetic, geochemical and sedimentological sediment records revealing the influence of specific magnetic mineral fractions, IRD lithologies and textural properties on the magnetic susceptibility signal. Part II of the associated manuscripts (Bukar et al., submitted) also features so far unreported rock magnetic property data of all observed IRD lithologies. These susceptibility, IRM, ARM and HIRM data were acquired from large or pooled (granule to gravel size) classified IRD specimens. Since IRD particles are not limited to larger grain sizes, three composite bulk sediment samples from units H1, I1 and H2 were wet-sieved to reveal the grain-size dependence of magnetic susceptibility. Six linear regression models finally compare the predictability of magnetic susceptibility from rock magnetic, geochemical, sedimentological and petrological data.
Keyword(s):
Supplement 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
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Size:
8 datasets
Download Data (login required)
Datasets listed in this bundled publication
- Wang, Y; von Dobeneck, T; Bukar, S et al. (in review): Bulk rock magnetic property records of sediment core GeoB18530-1. https://doi.pangaea.de/10.1594/PANGAEA.971729
- Max, L; von Dobeneck, T; Bukar, S et al. (in review): Element ratio proxy records for dolomitic and granitic IRD content in sediment core GeoB18530-1. https://doi.pangaea.de/10.1594/PANGAEA.971732
- Bukar, S; von Dobeneck, T (in review): Grain-size distribution and grain-size dependent magnetic susceptibility of sediment core GeoB18530-1. https://doi.pangaea.de/10.1594/PANGAEA.971771
- Bukar, S; von Dobeneck, T; Hilgenfeldt, C (in review): Isothermal Remanent Magnetization (IRM) acquisition curves for the unclassified IRD > 1mm fractions of sediment core GeoB18530-1. https://doi.pangaea.de/10.1594/PANGAEA.971697
- Bukar, S; von Dobeneck, T; Hilgenfeldt, C (in review): Isothermal Remanent Magnetization (IRM) acquisition curves for petrologically representative IRD particles of sediment core GeoB18530-1. https://doi.pangaea.de/10.1594/PANGAEA.971720
- von Dobeneck, T; Bukar, S (in review): Six linear regression models for the magnetic susceptibility of sediment core GeoB18530-1. https://doi.pangaea.de/10.1594/PANGAEA.971784
- Bukar, S; von Dobeneck, T (in review): Rock magnetic properties of petrologically representative IRD particles in sediment core GeoB18530-1. https://doi.pangaea.de/10.1594/PANGAEA.971696
- Wang, Y; von Dobeneck, T; Bukar, S (in review): Unclassified IRD susceptibility and content, porosity and grain density of sediment core GeoB18530-1. https://doi.pangaea.de/10.1594/PANGAEA.971687