Data/hora: 15/06/2024 18:15:43

Biblioteca(s): | Embrapa Cerrados.
Data corrente: | 11/03/1999
Data da última atualização: | 11/03/1999
Autoria: | CARVALHO JUNIOR, O. A. de; BAPTISTA, G. M. de M.; MADEIRA NETTO, J. da S.; MARTINS, E. de S.; CARVALHO, A. P. F.; MENESES, P. R.
Título: | Utilizacao de dados hiperespectrais do sensor A VIRIS para identificacao da feicao espectral da ligacao magnesio-hidroxila em latericos niqueliferos.
Ano de publicação: | 1998
Fonte/Imprenta: | In: SIMPOSIO BRASILEIRO DE SENSORIAMENTO REMOTO, 9., 1998, Santos, SP. Anais. Sao Jose dos Campos: INPE/MCT/SELPER, 1998.
Páginas: | nao paginado.
Idioma: | Português
Conteúdo: | Laterites containing nickel and occurring in the Votorantim mine in Niquelandia, GO, were sampled for mineral composition and reflectance spectra determinations in the laboratory. A VIRIS data of the sampled area, after atmospheric correction and reduction of radiance to scaled surface reflectance, were also used, with the objective of determining the spatial occurrences of nickel bearing minerals. Besides ferric oxides, the lateric material were rich in pimelite a clay mineral of the montmorilonite group presenting Mg-OH. In the reflectance spectra the Mg-OH bond is clearly identified by a sharp feature centered at 2300 nm regardless of the iron oxides occurrence. This feature could also be identified in the A VIRIS data. A simple arithmetic operation with two bands of the Mg-OH feature was useful in the determination of the occurrences of the pimelite rich laterites.
Palavras-Chave: | Brasil; Goias; Niquelandia.
Thesagro: | Cerrado; Sensoriamento Remoto.
Thesaurus Nal: | Brazil; remote sensing.
Categoria do assunto: | --
Registro original: | Embrapa Cerrados (CPAC)
Exemplares: | CPAC - (1897-1) - UPC - PL - -- - CRI4686 -  - CRI4686 - DIS