Lithology-specific IRD counts of sediment core GeoB18530-1
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| Format: | Dataset Open Access |
| Langue: | en |
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PANGAEA
2025
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| _version_ | 1867169476301029376 |
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| author | Bukar, Shettima Lisker, Frank von Dobeneck, Tilo Mulitza, Stefan |
| author_facet | Bukar, Shettima Lisker, Frank von Dobeneck, Tilo Mulitza, Stefan |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Total and lithology-specific ice-rafted detritus (IRD) counts of sediment core GeoB18530-1 were determined by stereomicroscopically identifying, picking and counting all recognizable IRD grains from the > 1mm dry sieve fraction, which had been obtained from the 125 µm wet sieve fraction of 10 cm^3 ultrasonically dispersed sediment (10 ml syringe sample). Total IRD counts vary between 1 and 300 grains per sample, i.e. 0.1 to 3 IRD grains/cm^3. The IRD lithologies were initially sorted by their physical properties including color, hardness, cleavage, grain size, and texture. Based on these stereomicroscopic observations, we devised a new (and evolving) IRD classification scheme of rocks and rock-forming minerals that was validated and refined by SEM and thin section analysis of the largest observed IRD particles (dropstones). Digital micrographs and thin sections of each classified IRD lithology are presented in dataset (https://doi.pangaea.de/10.1594/PANGAEA.971268). |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_971280 |
| institution | PANGAEA |
| language | en |
| publishDate | 2025 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Lithology-specific IRD counts of sediment core GeoB18530-1 Bukar, Shettima Lisker, Frank von Dobeneck, Tilo Mulitza, Stefan 509-1; ArcTrain; Counting >1000 µm fraction; DEPTH, sediment/rock; GC; GeoB18530-1; Grand Banks Margin; Gravity corer; Heinrich event; Heinrich events; Ice rafted detritus; Ice-Rafted Detritus; Ice rafted detritus, Amphibolite; Ice rafted detritus, Biotite Granite; Ice rafted detritus, Biotite Schist; Ice rafted detritus, Calcite; Ice rafted detritus, Dolerite; Ice rafted detritus, Garnet Gabbro; Ice rafted detritus, Greywacke; Ice rafted detritus, Hematite-coated quartz; Ice rafted detritus, Hornblende Granite; Ice rafted detritus, Microcline; Ice rafted detritus, Mudstone; Ice rafted detritus, Muscovite-Biotite Granite; Ice rafted detritus, Obsidian; Ice rafted detritus, Olivine Basalt; Ice rafted detritus, Ooid-bearing Dolomite; Ice rafted detritus, others; Ice rafted detritus, Quartz; Ice rafted detritus, Quartz Wacke; Ice rafted detritus, Scoria; Ice rafted detritus, Shale; Ice rafted detritus, Shocked Quartz; Ice rafted detritus, Sucrosic Dolomite; Ice rafted detritus, Tonalite; Maria S. Merian; MSM39; Petrology; Processes and impacts of climate change in the North Atlantic Ocean and the Canadian Arctic; SE Grand Banks Slope Total and lithology-specific ice-rafted detritus (IRD) counts of sediment core GeoB18530-1 were determined by stereomicroscopically identifying, picking and counting all recognizable IRD grains from the > 1mm dry sieve fraction, which had been obtained from the 125 µm wet sieve fraction of 10 cm^3 ultrasonically dispersed sediment (10 ml syringe sample). Total IRD counts vary between 1 and 300 grains per sample, i.e. 0.1 to 3 IRD grains/cm^3. The IRD lithologies were initially sorted by their physical properties including color, hardness, cleavage, grain size, and texture. Based on these stereomicroscopic observations, we devised a new (and evolving) IRD classification scheme of rocks and rock-forming minerals that was validated and refined by SEM and thin section analysis of the largest observed IRD particles (dropstones). Digital micrographs and thin sections of each classified IRD lithology are presented in dataset (https://doi.pangaea.de/10.1594/PANGAEA.971268). |
| title | Lithology-specific IRD counts of sediment core GeoB18530-1 |
| topic | 509-1; ArcTrain; Counting >1000 µm fraction; DEPTH, sediment/rock; GC; GeoB18530-1; Grand Banks Margin; Gravity corer; Heinrich event; Heinrich events; Ice rafted detritus; Ice-Rafted Detritus; Ice rafted detritus, Amphibolite; Ice rafted detritus, Biotite Granite; Ice rafted detritus, Biotite Schist; Ice rafted detritus, Calcite; Ice rafted detritus, Dolerite; Ice rafted detritus, Garnet Gabbro; Ice rafted detritus, Greywacke; Ice rafted detritus, Hematite-coated quartz; Ice rafted detritus, Hornblende Granite; Ice rafted detritus, Microcline; Ice rafted detritus, Mudstone; Ice rafted detritus, Muscovite-Biotite Granite; Ice rafted detritus, Obsidian; Ice rafted detritus, Olivine Basalt; Ice rafted detritus, Ooid-bearing Dolomite; Ice rafted detritus, others; Ice rafted detritus, Quartz; Ice rafted detritus, Quartz Wacke; Ice rafted detritus, Scoria; Ice rafted detritus, Shale; Ice rafted detritus, Shocked Quartz; Ice rafted detritus, Sucrosic Dolomite; Ice rafted detritus, Tonalite; Maria S. Merian; MSM39; Petrology; Processes and impacts of climate change in the North Atlantic Ocean and the Canadian Arctic; SE Grand Banks Slope |
| url | https://doi.org/10.1594/PANGAEA.971280 |