Biogeochemical Reaction Network Simulator (BRNS) model code and output files for the manuscript “Silicon cycling from ice-sheet to coastal ocean: insights from isotope geochemistry” by K. Hendry, et al., submitted to Nature Communications Earth & Environment (February 2025). Output files for three stations (Core A, B and C for inner fjord, mid fjord and outer/shelf environment respectively). Steady state site specific model code and Maple scripts are available via GitHub (https://github.com/kathen-28Si/GlacialSynthesis_Si_BRNS_Hendry_etal/tree/main). For model development please also see: Ward, J. P., Hendry, K. R., Arndt, S., Faust, J. C., Freitas, F. S., Henley, S. F., ... & Airs, R. L. (2022). Benthic silicon cycling in the Arctic Barents Sea: a reaction–transport model study. Biogeosciences, 19(14), 3445-3467. https://doi.org/10.5194/bg-19-3445-2022 Ng, H. C., Hawkings, J. R., Bertrand, S., Summers, B. A., Sieber, M., Conway, T. M., ... & Hendry, K. R. (2022). Benthic dissolved silicon and iron cycling at glaciated Patagonian fjord heads. Global Biogeochemical Cycles, 36(11), e2022GB007493. https://doi.org/10.1029/2022GB007493