The dataset contains pore water and core incubation silicic acid concentration and isotope measurements, sponge silicon isotope measurements, and pore water major and trace elemental concentrations obtained from seven sediment cores collected from the Greenland margin and the Labrador Sea. The samples were collected as part of the European Research Council project ICY-LAB (ERC-2015-STG grant agreement number 678371).

Supplement to: Ng, Hong Chin; Cassarino, Lucie; Pickering, Rebecca A; Woodward, E Malcolm S; Hammond, Samantha J; Hendry, Katharine R (2020): Sediment efflux of silicon on the Greenland margin and implications for the marine silicon cycle. Earth and Planetary Science Letters, 529, 115877