Chemostratigraphy of the Snorry Drift in the North Atlantic

Демина, Л. Л.; Novichkova, Ye. A.; Kozina, N. V.

doi:10.1134/s0001437019030032

Cited by 2 publications

(1 citation statement)

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“…IRD index was calculated as the number of lithic grains per gram of dry sediment (grains/g). In the AI-3378 core, lithic grains were calculated with a 10-cm step and in the AMK-4493 core, with a 2-cm step [15,34,40]. The total carbon and total organic carbon (TOC) contents were determined by automatic coulometry with an AN 7529 carbon analyzer (precision 0.01%).…”

Section: Stable Oxygen Isotope Ird Toc and Sio 2am Analysismentioning

confidence: 99%

Geochemical Signatures of Paleoclimate Changes in the Sediment Cores from the Gloria and Snorri Drifts (Northwest Atlantic) over the Holocene-Mid Pleistocene

et al. 2019

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A multiproxy study of the sediment cores taken from the Snorri Drift, formed under the influence of the Iceland–Scotland bottom contour current, and from the Gloria Drift, located southward Greenland at the boundary of Irminger and Labrador Seas, was performed. This area undergoes a variable mixing of polar waters with the warm North Atlantic current, whose intensity and direction seemed to change dramatically with the alteration of warming and cooling periods during the six marine isotope stages MIS 1-6. The relative age of this core does not exceed 190,000 cal yr BP; the average sedimentation rate was 1.94 and 2.45 cm/kyr in the Gloria and Snorri Drifts core respectively. In both the cores, the sediment records showed the downcore co-variation of ice-rafted debris (IRD); and terrigenous elements, such as Si, Al, Ti, Cr, and Zr, were revealed; their values were clearly higher in the glacial periods (MIS 2, 4, and 6) compared to interglacials (MIS 1, 3, and 5). The downcore rhythmic distributions of these elements, as well as Al/Si, Ti/Al, Fe/Al ratios exhibit an opposite trend with that of δ18O values, biogenic components (CaCO3, BioSiO2), and Si/Fe and Mn/Fe ratios.

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Section: Stable Oxygen Isotope Ird Toc and Sio 2am Analysismentioning

confidence: 99%