These data were produced from sediment samples taken from the kasten core RAPiD-21-3K (57°27.09'N, 27°54.53'W, 2630m) from the Gardar Drift in the subpolar North Atlantic Ocean during the RRS Charles Darwin's cruise CD159 in 2004. Data generation took place in the Department of Earth Sciences, University of Oxford from 2022-2024. The polynomial age-model for this study was produced using four carbon-14 accelerator mass-spectrometry values from core RAPiD-21-3K, and six lead-210 values from the box core RAPiD-21-12B. The uppermost metre of the core (~800 years) was divided into 50 samples, with approximately 8-year resolution, for the quantification of silica mass in diatom frustules and radiolarian tests. 60 Coscinodiscus sp. frustules and 40 Hexacontium sp. tests per sample were isolated and their silica mass contents measured using ICP-mass spectrometry. 14 of these samples were used for size analysis, wherein 12-13 Coscinodiscus sp. frustules per sample were observed under a scanning electron microscope and their valve areas, valve diameters, valve face porosities, and mantle thicknesses were measured. The core was scanned using an ITRAX X-Ray Fluorescence core scanner at 2mm (1.6 year) resolution for flux quantification. Br and Si intensities were calibrated into weight percent Br and SiO2 and combined with the core dry-bulk density and sedimentation rate, and the latter with the measured silica mass-per-diatom frustule, to infer the flux of total organic carbon and the flux of diatoms to the sediments