Cocientes de bandas espectrales ASTER para la diferenciación litológica en formas del relieve de baja pendiente (NW de la Cuenca del Duero, León, España)
- Eduardo García-Meléndez 1
- Arturo Báscones 1
- Montserrat Ferrer Julià 1
- Mercedes Suárez 2
- Elena Colmenero Hidalgo 1
- Juncal Altagracia Cruz Martinez 1
- Inés Pereira 1
- 1 Grupo de Investigación Geología Ambiental, Cuaternario y Geodiversidad (Q-GEO), Facultad de Ciencias Biológicas y Ambientales. Universidad de León. León
- 2 Departamento de Geología. Universidad de Salamanca. Salamanca
ISSN: 0213-683X
Year of publication: 2023
Issue: 73
Pages: 79-82
Type: Article
More publications in: Geogaceta
Abstract
In this study ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer) images are used for mapping purposes associated with mineral compositions in flat and gently sloping free crop cultivated areas in the northwestern Duero Basin. Several image band ratios have been applied to the ASTER multispectral dataset corresponding to the visible and near-infrared (VNIR) and to the short-wave infrared (SWIR) wavelengths. These band ratios enhance the absorption features related to both electronic and vibrational processes corresponding to iron oxides minerals and phyllosilicates minerals respectively. The results obtained show that in the northern and westernmost areas with Paleozoic basement, Neogene and Plio-Quaternary sediments, iron oxides minerals are more frequent. On the other hand, in the easternmost area, characterized by the Quaternary Tuerto and Órbigo river terraces, extensive areas show the existence of Al-bearing phyllosilicates. These results add information for geological, lithological and mineral prospection mapping in almost flat areas, where outcrops are scarce.