Composición mineralógica de unidades sedimentarias cenozoicas mediante espectroscopía de reflectancia de laboratorio (VNIR–SWIR) en el sector noroccidental de la Cuenca del Duero (León, España)

  1. A. Báscones 1
  2. Eduardo García-Meléndez 1
  3. María Mercedes Suárez Barrios 2
  4. Montserrat Ferrer-Julià 1
  5. Elena Colmenero Hidalgo 1
  6. A. Quirós 3
  1. 1 Universidad de León

    Universidad de León

    León, España


  2. 2 Universidad de Salamanca

    Universidad de Salamanca

    Salamanca, España


  3. 3 Universidad en León
Geotemas (Madrid)

ISSN: 1576-5172

Datum der Publikation: 2021

Nummer: 18

Seiten: 352-355

Art: Artikel

Andere Publikationen in: Geotemas (Madrid)


Laboratory reflectance spectroscopy techniques were used to measure the mineralogical composition of the sam- ples collected on the surface of Neogene and Quaternary sediments from the Northwestern sector of the Duero Basin. The vibrations of the bonds that form the crystalline structure of some minerals produce absorption features in specific positions on the electromagnetic radiation spectrum in the SWIR (1200–2500 nm). By applying the method of the second derivative, we established correlations between the mineralogical results obtained by XRD and the characteristics of the absorption features produced by the minerals that are part of the studied sediments. Among the clay minerals that are present in the analyzed sediments, kaolinite shows the best correlation to the spectral data. Through the measurement of geometrical parameters based on spectral features such as the band center and the intensity of the absorption band, we established a distinction of the main types of Fe-oxides (hematite/goethite) that are developed on the analyzed soils. These absorption features are produced in specific zones of the VNIR (400–1200 nm) by electronic transitions and charge transfer processes of Fe.