Independent component analysis (ICA) model is proposed to extract alteration minerals using spaceborne hyperspectral
data, because the result of present methods for alteration minerals identification are affected easily by the factors
including excursion and variation of spectral signatures, interference of environment conditions and insufficient spectral
library. In our work, the proposed method can realize extraction of alteration minerals under condition that the prior
information of mineral spectra is unknown and the background model is not built. Therefore, this method is successfully
applied to spaceborne Hyperion data at Qulong district of Tibet, and the application result in our work is approximately
in accord with the geological map. Four kinds of minerals have been identified, which include kaolinite, chlorite,
rich-aluminium sericite, and poor-aluminium sericite. And then the result that is obtained by ICA model can illuminate
the validity and practicability of the proposed method and can provide some useful information and direction for the
prognostication of mineral resource.
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