AN ´ ALISE DE DADOS HIPERESPECTRAIS EM MINA DE MANGAN ˆ ES LATERITICO, S ˜

The aim this paper is to develop a methodology of lateritic manganese identification using imaging spectroscopy. In this study was used the Airborne Visible/InfraRed Imaging Spectrometer (AVIRIS) image. The AVIRIS is an imaging sensor that measures the solar reflected spectrum from 400 nm to 2500 n ma t 10 nm intervals. The study area is located at GoiState and enclosed the Fazenda Extrema mine that presents lateritic manganese deposits developed on ParanoGroup rocks. Laboratory spectrometry studies conjugated with mineralogical analysis by diffractometry of X-ray demonstrated that the ore spectrum is opaque and spectrally featureless, due to the conduction band of MnO3 extending throughout this spectral range. The digital image processing can be subdivided in the following steps: (a) atmospheric correction using Green method, (b) areas selection with opaque behavior from the integral spectra calculation, and (c) lateritic manganese individualization usingtheMinimumNoiseFractiontransformation. Themethodisefficienttoclassifyareasofabandonedmanganeseminethatconsistofpriorityareasforimplementation of environmental recovery.