Characterization and evaluation of hydrothermally influenced clayey sediments from Caldeiras da Ribeira Grande fumarolic field (Azores Archipelago, Portugal) used for aesthetic and pelotherapy purposes
Océano Atlántico, fluorescence, Portugal, Azores, pH, risk, alunite, analgesia, clay minerals, enthalpy, feldspar, humans, sediments, silicon, skin diseases, sulfates, surveys, toxic substances, X-radiation, X-ray diffraction