Iron mineralogy of mine-drainage precipitates as environmental indicators: review of current concepts and a case study from the Sokolov Basin, Czech Republic
The present paper consists of two parts: a short review of the genesis and properties of the named minerals, and a study of mine-drainage precipitates formed under different local conditions in various lignite mines and mine dumps of the Sokolov mining district. We show that variations in mine-drainage precipitate mineralogy, such as the presence or absence of specific 'key' minerals, can serve as indicators for factors such as the pH and sulphate concentration, and thus – with certain limitations – for the genetic environment during precipitate formation. Such variations in composition are reflected, among other properties, in the precipitate colour, which can therefore be used for a rapid identification and classification – both in the field and by remote sensing – of regions that are potentially prone to acid mine drainage.
Keywords: ACID MINE DRAINAGE; COAL; COLOUR; CZECH REPUBLIC; FERRIHYDRITE; GOETHITE; INFRARED SPECTROSCOPY; IRON; JAROSITE; LEPIDOCROCITE; MOSSBAUER SPECTROSCOPY; OXIDATION; PH; PRECIPITATES; SCHWERTMANNITE; WEATHERING; X-RAY DIFFRACTION
Document Type: Review Article
Publication date: 2005-12-01