Data and code for: Cryptic micropores decouple fluid access from reactant supply in basalt

This repository contains data and custom Python code associated with the manuscript “Cryptic micropores decouple fluid access from reactant supply in basalt.” The deposited materials include: README.md : an overview of the repository contents. Images.zip : segmented three-dimensional pore images (TIFF; voxel size 3.25 µm; pore = 1, solid = 0) of the 14 reactive-transport domains (seven each) from Hellisheidi Basalt (HB) and Jeju Basalt (JGB). TOUGHREACT_inputs.zip : TOUGHREACT V4.13-OMP input files (chemical.inp, flow.inp and solute.inp) used for the batch geochemical simulations of HB and JGB. Code.zip : supplied_surface.py, a Python script for identifying macropores, calculating geodesic distances through connected pore space and estimating geometrically supplied surface fractions, together with its README.md and LICENSE files. The script can also map simulated concentration fields onto the pore images and determine wall-concentration profiles and the transition distance d80. Macropores are identified by morphological opening, and geodesic distances are calculated from macropore boundaries through the effective connected pore network using 26-neighbour minimum-cost paths. The geometrically supplied surface fraction is calculated as the area-weighted fraction of pore-wall faces located within a specified reference distance from a macropore. The deposited files support the pore-geometry analysis, batch geochemical simulations and supplied-surface calculations reported in the associated manuscript. Simulated concentration fields are available from the corresponding author upon reasonable request. Detailed descriptions of the imaging, image processing, simulations and analytical procedures are provided in the manuscript and its Supplementary Information. Data are released under the Creative Commons Attribution 4.0 International License (CC BY 4.0). The code in Code.zip is released under the MIT License.