Elemental Mapping Reveals Selective Dolomitization in Tonian Stromatolites: Implications for Early Diagenesis and Paleoenvironmental Proxies —— Raw data used for the calculation of EF and ƒEl

We provide in situ laser ablation inductively coupled plasma time-of-flight mass spectrometry (LA-ICP-TOF-MS) into the geochemical processes of fluid-mineral reactions on the early Earth’s surface and their evolution. Utilizing different distributions of redox-sensitive elements (Fe and Mn, etc.) within stromatolite laminae and dolomite growth zonings, we meticulously reconstructed redox potential fluctuations within the Tonian seawater-porewater system. Here we provides original elemental mapping data about this research.