Organic carbon and nitrogen and bulk nitrogen isotope data and metal abundance data for siltstones and shales of the Mesoproterozoic Diabaig Formation. For a detailed description and interpretation, see Stüeken, E.E. and Prave, A.R., 2022. Diagenetic nutrient supplies to the Proterozoic biosphere archived in divergent nitrogen isotopic ratios between kerogen and silicate minerals. Geobiology.

Solubility and kinetic data for Fe(II)-silicate precipitation over a range of temperatures, as well as metal drawdown and metal release during diagenesis. Characterisation data for solid precipitates using FTIR and XRD. The XRDML data should be opened on Panalytical highscore, and the XLS file should be opened with Excel, Numbers or OpenOffice. Paper currently under review ‘Micronutrient availability in ferruginous, silica-rich Precambrian oceans’, Rosalie Tostevin, Imad Ahmed

Pyrite samples from selected sedimentary organic-rich formations or associated igneous and metamorphic rocks were analysed by conventional S isotopic analysis. Pyrites were measured in order to provide insights into their origin. Light and variable S isotope compositions in pyrite have been used to infer the influence of sulphate-reducing bacteria (and subsequent Se precipitation by sulphate-reducing microbes), whereas heavier S isotope compositions indicate a non-biological origin (i.e. physical and chemical diagenesis).