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.