Supporting data and calculations for artificial beachrock MICP: petrography, point counting, carbon accounting, partial LCA and TAN-N screening

This dataset contains original and curated petrographic point-counting data, cross-polarized-light thin-section scans, and reproducible calculation files for reagent inventory, gross mineral carbon, partial input global-warming-potential and energy screening, theoretical total ammoniacal nitrogen as nitrogen (TAN-N), transport, and a hypothetical 5,400 m³ shoreline-scale artificial-beachrock scenario. The accompanying documentation defines the variables, units, equations, assumptions, provenance, uncertainty and known limitations. Internal experimental codes are retained only where required for provenance and are not taxonomic identifiers. The life-cycle and TAN-N outputs represent screening calculations rather than a complete ISO-conformant life-cycle assessment, verified net-carbon-removal assessment, measured environmental release, or ecological-risk assessment. The hypothetical shoreline-scale scenario is an inventory projection and does not demonstrate coastal-protection performance.