Full-range (VNIR–SWIR–MWIR–LWIR) mineral and VNIR water spectra with co-located geochemistry from an acid mine drainage (AMD) site (Kirki, NE Greece)

Acid mine drainage (AMD) environments host complex mineral-water systems that are not well represented by spectral libraries derived solely from pure minerals. We present an open dataset that integrates spectroscopy of natural AMD materials with co-located mineralogical and geochemical measurements from the Kirki (Saint Philippos) mine in NE Greece. The dataset includes: (i) laboratory mineral reflectance spectra spanning 350-15,375 nm (visible-near infrared (VNIR)-shortwave infrared (SWIR)-mid-wave infrared (MWIR)-longwave infrared (LWIR)) for 26 compositionally diverse solid samples; (ii) in situ water VNIR spectra from 337-823 nm collected over AMD-impacted streams and lakes; (iii) co-located field measurements (e.g., temperature, pH, electrical conductivity, turbidity); and (iv) an extensive suite of laboratory analyses for both solids and waters, including mineralogical, major-element, and trace-element data. All spectral and analytical products are provided in a harmonized format, with detailed metadata, instrument specifications, and processing documentation. The dataset is designed to support the development and testing of spectral analysis methods, quantitative retrieval algorithms, and cross-sensor comparisons in AMD settings, and to serve as a high-fidelity analog resource for planetary spectroscopy where sulfate- and Fe-oxide detection and longwave infrared mineral characterization are of interest.