Reconocimiento del yeso de la Formación Auquilco mediante imágenes ASTER en laCordillera Principal mendocina: una herramienta efectiva para el mapeo geológico y estructural

MESCUA, J. F.

Florianópolis

Simposio; XIII Simpósio Brasileiro de Sensoriamento Remoto; 2007

Instituto Nacional de Pesquisas Espaciais (INPE)

Abstract. Three methods are presented for recognition and mapping of gypsum using ASTER L3A data. Method nº1 uses the Quartz index developed by Ninomiya (2003) for data of the TIR subsystem, method nº2 applies two different band ratios of the SWIR subsystem, and method nº3 is a band combination using bands of the TIR and SWIR subsystems, defined on the base of the spectral signature of gypsum. The results were checked in a study area in the Andes of Mendoza Province, Argentina (34°15´ - 34°30’ S and 69°45´ - 70°00’ W). All the tested methods proved effective for lithologic mapping of gypsum in the study area; the coherence in the results using independent subsystems of ASTER serves also as a validation of the success of all three techniques.Three methods are presented for recognition and mapping of gypsum using ASTER L3A data. Method nº1 uses the Quartz index developed by Ninomiya (2003) for data of the TIR subsystem, method nº2 applies two different band ratios of the SWIR subsystem, and method nº3 is a band combination using bands of the TIR and SWIR subsystems, defined on the base of the spectral signature of gypsum. The results were checked in a study area in the Andes of Mendoza Province, Argentina (34°15´ - 34°30’ S and 69°45´ - 70°00’ W). All the tested methods proved effective for lithologic mapping of gypsum in the study area; the coherence in the results using independent subsystems of ASTER serves also as a validation of the success of all three techniques.