Supplementary material to "The Diagenetic Fingerprint of Rotliegend Sandstones in the Groningen Gas Field"

Analysis methodologyThis appendix provides additional details regarding the application of Correspondence Analysis (CA) to the point count data of authigenic minerals, following the theoretical framework outlined by Greenacre (2017) and Rosera and Coleman (2021).The analysis is based on a contingency table where the rows represent different mineral species, while the columns correspond to individual samples.This tabulation forms an 𝑖 × 𝑗 matrix, 𝑁, where 𝑖 denotes the number of mineral species and 𝑗 represents the number of samples.To facilitate the analysis, this matrix is converted into a correspondence matrix, defined as:where 𝑃 is the correspondence matrix and 𝑛 is the grand total, calculated as: