Primary data for "Hematite and Siderite Nanocrystals in ~3.48 Ga Dresser Formation Jaspilite: Implications for Early Atmospheric O2 and CO2"

This dataset contains primary data supporting the manuscript “Hematite and Siderite Nanocrystals in ~3.48 Ga Dresser Formation Jaspilite: Implications for Early Atmospheric O2 and CO2.” The archive includes numerical source data, XRD/Rietveld files, Fe2O3 reconstruction calculations, PHREEQC model plotting data and scenario keys, a PHREEQC template script, image metadata, and supporting README files for the main manuscript and supplementary material. The archived data can be accessed using standard spreadsheet, text-editor, diffraction-analysis, image-analysis, and geochemical modeling tools. CSV files can be opened with Microsoft Excel, LibreOffice Calc, R, Python/pandas, MATLAB, or any plain-text editor. XYE files containing integrated XRD patterns are plain-text diffraction data and can be opened with text editors or imported into XRD/Rietveld software such as TOPAS, GSAS-II, or other diffraction-analysis programs. XLSX workbooks can be opened with Microsoft Excel or compatible spreadsheet software and are included to preserve calculation steps, plotting workbooks, and formula-based workflows. PHREEQC model scripts are provided as plain-text files and can be run or modified using PHREEQC with the redox.dat database. Image metadata files are provided as CSV/XLSX tables, and archived image files can be opened with standard image-viewing or image-analysis software such as ImageJ/Fiji.